Similar
The photographic history of the Civil War - thousands of scenes photographed 1861-65, with text by many special authorities (1911) (14576244589)
KENNEDY SPACE CENTER, FLA. -- During the FIRST robotics event held at the University of Central Florida Arena March 8-10, Center Director Bill Parsons (left) talks to students from Titusville, Fla., about their robot. The team is cosponsored by ASRC Aerospace and The Boeing Company, and represents Astronaut and Titusville High Schools. The FIRST, or For Inspiration and Recognition of Science and Technology, Robotics Competition challenges teams of young people and their mentors to solve a common problem in a six-week timeframe using a standard "kit of parts" and a common set of rules. Teams build robots from the parts and enter them in a series of competitions designed by FIRST founder Dean Kamen and Dr. Woodie Flowers, chairman and vice chairman of the Executive Advisory Board respectively, and a committee of engineers and other professionals. FIRST redefines winning for these students. Teams are rewarded for excellence in design, demonstrated team spirit, gracious professionalism and maturity, and ability to overcome obstacles. Scoring the most points is a secondary goal. Winning means building partnerships that last. Photo credit: NASA/Kim Shiflett KSC-07pd0625
CAPE CANAVERAL, Fla. – Workers help secure one of two solid rocket boosters to a mooring at Port Canaveral in Florida. Liberty Star, one of NASA’s two booster retrieval ships, towed the spent booster from space shuttle Atlantis’ final launch to the port. The shuttle’s two solid rocket booster casings and associated flight hardware are recovered in the Atlantic Ocean after every launch by Freedom Star and Liberty Star. The boosters impact the Atlantic about seven minutes after liftoff, and the retrieval ships are stationed about 10 miles from the impact area at the time of splashdown. After the spent segments are processed, they will be transported to Utah, where they will be deserviced and stored, if needed. Atlantis began its final flight, STS-135, at 11:29 a.m. EDT on July 8 to deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. Photo credit: NASA/Kim Shiflett KSC-2011-5485
Astra Rocket 3.0 flight 1 launch campaign 11
Lake Pokegama Reservoir Dam, Grand Rapids, Itasca County, MN
A view of the electronic weighing indicator used by National Aeronautics Association officials to verify the weight of the KC-135R Stratotanker aircraft"Cherokee Rose"prior to a series of four record-setting"time-to-climb"flights in the aircraft
National Health and Environmental Effects Research Laboratory (NHEERL) - Gulf Ecology Division (GED) [412-NHE-GED_Photos-TANKS3.jpg]
Automatvåg. >>, Tekniska museet, Sweden
Related
Röntgenstrahlen und Elektrotherapie - mit Kapiteln über Radium und Phototherapie (1910) (14571457790)
Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14571769637)
Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14758137145)
Practical radiography - a handbook for physicians, surgeons, and other users of X-rays (1901) (14754633491)
Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14571660097)
Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14758251035)
Die Röntgentechnik - Lehrbuch für Ärzte und Studierende (1906) (14755850044)
Manuel de radioscopie et de radiographie par l'emploi des rayons X (1900) (14570343890)
The Röntgen rays in medical work (1907) (14757527515)
A manual of practical medical electricity - the Röntgen rays and Finsen light (1902) (14597009828)
Zusammenfassung
Identifier: manualofpractica00turn (find matches)
Title: A manual of practical medical electricity : the Röntgen rays and Finsen light
Year: 1902 (1900s)
Authors: Turner, Dawson
Subjects: X-Rays Electrophysiology Electrosurgery Electric Stimulation Therapy Electrotherapeutics X-rays Electrophysiology Electrosurgery
Publisher: New York : William Wood & Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School
Text Appearing Before Image:
xes ; but owing to the solution creepingout and short-circuiting, it was not very durable. Ofthese faults others have also complained. It has beenpractically displaced in this country by some form ofLeclanche cell. The chloride of silver cell is naturally somewhat expen-sive, the small size costing 2s. lod. each ; but as the silveris not wasted, it can be cheaply recharged, and if itsdurability could be relied upon, it would be one of thebest portable medical cells. The Marie Davy or Persulphate of Mercury Cell. Of this there are also several forms. (a) The electrolyte is a solution of the persulphate ofmercury. (b) The positive element is of zinc. Forms of Primary Cells 43 (c) The negative element is of carbon. (d) The depolarizer is the persulphate of mercury.The E. M. F. is about i5 volts. The internal resistance is low. During action, the zinc decomposes the water, yieldinghydrogen, which, appearing at the carbon, displaces themercury, to form sulphuric acid and metallic mercury ;
Text Appearing After Image:
Fig. 20.—Persulphate of Mercury Cell Battery. the former attacks the zinc, while the latter collects at thebottom. In the old form, the cell resembled the Daniell, and hada porous pot, the sulphate of mercury taking the place ofthe sulphate of copper, and the carbon that of the copper.The porous pot is dispensed with in the later forms. Gaiffe uses a divided ebonite trough to form two smallcells. The carbon plates are placed at the bottom of the 44 A Manual of Practical Medical Electricity trough, and are smeared over with a paste of sulphate ofmercury ; the zincs form Hds which he over them. In Schanschieffs ceh there are two carbons to each zinc,and a strong solution of the basic sulphate is the excitant. In some of the later forms of sulphate of mercurybatteries, there is an arrangement for raising or loweringthe elements out of or into the solution, according to thestrength of current required, and, to insure portability,
Nichts gefunden.