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Cyclotron shelter building contest drawing, taken September 27, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Cyclotron shelter building contest drawing, taken September 27, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Cyclotron shelter building contest drawing, taken September 27, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Cyclotron shelter building contest drawing, taken September 27, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Cyclotron shelter building contest drawing, taken September 27, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site excavation with Robert Cornog, taken October 2, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site copper delivery, taken October 2, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. First copper delivery, taken October 2, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site excavation, taken October 5, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site excavation, taken October 5, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet 5 ft. thick subfoundation being poured (east end of excavation pit), taken October 8, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. Naomi Weiss with 100,000 pounds of copper, taken October 10, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet foundation reinforcing steel bed, taken October 10, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet foundation forms, taken October 10, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet foundation forms, taken October 10, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet foundation with half of the concrete poured, taken October 11, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

60-inch cyclotron. Condit (with back to camera) and Nailen hoisting tank at 60-inch cyclotron, taken October 12, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Old Bill, Bill Brobeck, at 60-inch cyclotron with cans used for shielding, off north end. Photo taken October 12, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Group at the beach, including Paul Aebersold, Edwin McMillan, and John Lawrence. Taken October 13, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Edwin McMillan on 184-inch magnet foundation forms. Taken October 16, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Bill Brobeck with184-inch magnet copper sample from Phelps Dodge Copper Products Corporation, taken October 17, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet foundation forms. Pouring concrete into the east wall, taken October 17, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet foundation. Pouring concrete into the base, taken October 18, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Brode's magnet, taken October 21, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Ernest Orlando Lawrence standing on 184-inch magnet foundation west rail, taken October 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Edwin McMillan with184-inch magnet "power line," taken October 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet rail, with Edwin McMillan, taken October 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Workman in discussion with Bob Wicker and Wallace B. Reynolds at 184-inch magnet site, taken October 31, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Pastoral view, with cows, of the future construction site for the 184-inch cyclotron. Photo taken October 31, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Brown at Van Norman 22L, taken November11, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. Left to right: Bill Farley, Paul Aebersold, Bill Brobeck, John Backus, Robert Cornog, taken November 12, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. Wallace B. Reynolds, Henry Bigge (Bigge Drayage Co., Oakland), and Bill Brobeck, taken November 14, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Bill Farley and Donald Cooksey on Santa Fe railcar, taken November 19, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet foundation, Wilson bracing "H" beam support, taken November 19, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. Moving first plate into position, taken November 25, 1940. Photo includes onlookers. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. First plate being lowered into place, taken November 25, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. First plate resting on the rails while the rear of the truck is being supported, taken November 25, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Cutting machine at the184-inch magnet site, taken November 25, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. First plate being lowered into place, taken November 25, 1940. Photo includes onlookers. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch magnet site. Bill Brobeck on first installed plates, taken November 27, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron. Bracing on first plate to bring it true, taken November 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron. Tightening plates with a compressed-air wrench, taken November 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron. Lowering the 52-inch plate into foundation pit, taken November 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron magnet site. Paul Aebersold and Donald Cooksey standing on rail, taken November 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction. Donald Cooksey (left) and Paul Aebersold, taken November 28, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron. Jacking ends of the plate into the same plane, taken December 2, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction site looking west, taken December 4, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction. First 15 of the 52-inch plates in place with John Backus inspecting, taken December 4, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction, 52-inch plate being unloaded from truck, taken December 4, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction showing beveled plate ends, taken December 4, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction. Dick Connell, Wallace B. Reynolds, and Bill Brobeck with 26 plates in place, taken December 7, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction, with 74 plates in place, taken December 21, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Klamath Falls, Oregon, trading center for prosperous agricultural, lumbering, cattle and sheep raising area. Principal agricultural crop is potatoes

Public domain photograph of life in the United States in the 1930s, free to use, no copyright restrictions image - Picryl description

Principal's son on way home from nursery school. Homestead school. Dailey, West Virginia

Public domain photograph of West Virginia in 1930s, free to use, no copyright restrictions image - Picryl description

Cardinal Hayes Memorial High School, Grand Concourse, Bronx, New York. Principal's office

Picryl description: Public domain image of a living room, salon, office, late 19th-century interior, free to use, no copyright restrictions.

Corozal, Puerto Rico (vicinity). Principal of a nearby school reciting a poem at the tenant purchase celebration

Public domain photograph related to Puerto Rico, free to use, no copyright restrictions image - Picryl description

Donald Cooksey at the Encinal docks with half disks, taken January 17, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Bill Brobeck at the Encinal docks with half disk, taken January 17, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction. The last plate being lowered by crane, taken January 21, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction looking west, taken January 28, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction with Paul Aebersold, taken January 28, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction with Donald Cooksey (left) and Bill Farley, taken January 28, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Paul Aebersold and 60-inch cyclotron Dees with new deflector, taken February 13, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

60-inch cyclotron construction. Paul Aebersold behind lead screen with demountable deflector, taken February 13, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Hendly Pant with stack of half disks, taken February 18, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Ernest Orlando Lawrence (left) and C.E.K. (Charles Edward Kenneth) Mees, taken February 20, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

William H. Donner, taken February 28, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction with Helen Griggs (future wife of Glenn T. Seaborg), taken March 12, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Paul Aebersold at184-inch cyclotron base, taken March 13, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Paul Aebersold standing on 184-inch cyclotron structure, taken March 13, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Donald Cooksey at184-inch cyclotron base, taken March 13, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction, taken March 13, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Millicent Sperry (future wife of Donald Cooksey) at 184-inch cyclotron construction site, taken March 20, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Individuals, including Lawrence Kruse (left) and Arthur Brown, Jr. (second from left), at 184-inch cyclotron construction site, taken March 20, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Paul Aebersold on top of first upper horizontal slab,184-inch cyclotron construction, taken March 24, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Wallace B. Reynolds at 184-inch cyclotron construction site, taken March 24, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction, taken March 24, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction, with view of San Francisco Bay and the Oakland-Bay Bridge. Taken March 24, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction, taken March 24, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Isidor Isaac Rabi, physicist and Nobel Laureate, taken April 11, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Wallace B. Reynolds, Henry Bigge (Bigge Drayage Co., Oakland), and Chester Morris (builder of the Campanile) standing by 184-inch cyclotron construction site, taken April 17, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

184-inch cyclotron construction, taken April 17, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Crane operator at 184-inch cyclotron construction site, taken April 17, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Carl G. Lawrence, Dr. and Mrs. George Blumer, Molly Lawrence, Gunda Lawrence, and Ernest Orlando Lawrence standing in front of the "Grizzly Giant" Mariposa big tree, taken April 18, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Helen Griggs and the boat, Delta Ray, at Miller's Yacht Harbor, Antioch Bridge. Helen became the wife of Glenn Seaborg. Taken April 25, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

John Lawrence (facing camera) at the lower core. 184-inch cyclotron construction site, taken April 28, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Robert Cornog's mew pump, taken May 2, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Dick Connell surveying the lower core at the 184-inch cyclotron construction site, taken May 7, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Dick Connell (left, back to camera) watch as workmen tighten bolts on the lower core at the184-inch cyclotron construction site, taken May 7, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Don Littlefield, Jack Wilson, unknown individual, Robert Cornog, 2 unknown individuals, Stephen F. Hurlburt, William C. Twitchell, and Dick Connell at 184-inch cyclotron construction site, taken May 8, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Robert Cornog (center) at184-inch cyclotron construction site. Lower core completed, except for disks. Photo taken May 8, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Lower core of 184-inch cyclotron, taken May 8, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Robert Cornog at 184-inch cyclotron construction site, taken May 8, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Bill Farley at 184-inch cyclotron construction site. Note gaps under straight edge. Photo taken May 9, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Workmen preparing first half disk for lower core at 184-inch cyclotron construction site, taken May 12, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

First (11-ton) disk being placed on lower core at 184-inch cyclotron construction site, taken May 12, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Paul Aebersold at 184-inch cyclotron construction site, taken May 14, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Joseph Hamilton (left) and Paul Aebersold on lower core of 184-inch cyclotron with Bill Twitchell working below, taken May 15, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Paul Aebersold at184-inch cyclotron construction site, taken May 15, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Lower core of 184-inch cyclotron, taken May 15, 1941. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab