Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14571466909)

Identifier: rntgenrayselectr00kass (find matches)
Title: Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy
Year: 1910 (1910s)
Authors: Kassabian, Mihran Krikor, 1870-1910
Subjects: Electrotherapeutics X-rays Phototherapy Radiology Radiotherapy
Publisher: Philadelphia & London : J.B. Lippincott Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School



Text Appearing Before Image:
his machine, devised by Dr. E. Y. Wagner, of Chicago, is a 100-plate machine composed of 50 stationary glass plates (31 inches indiameter) and 50 revolving mica plates (28 inches in diameter). Theseare driven by a 5-h.p. motor connected vertically through the upperend of the axle, which is vertical. The cabinet is hexagonal and istopped with a crown. It is claimed that this machine is capable ofgiving anywhere from 1800 to 6000 revolutions per minute. Dr. Henry Hulst, of Grand Rapids, Michigan, who is using thismachine, has kindly furnished me the following data: The axle is vertical and the plates horizontal instead of vice versa.The motor is a 5-horsepower, 110-volt, callable of giving 1800 revolutionsper minute, placed on top and connected with a pin coupling to the shaftsThe end-thrust bearing consists of two ball-bearing disks running inoil. There are fifty 28-inch revolving plates. The case is very solidlymade and is hexagonal 5 consequently the machine occupies less floor space
Text Appearing After Image:
Fig. 81G.—100-plate static machiue of Wagner. THE EOXTGEN EAY APPARATUS. 175 than auy ordinary nracliiue. The vertical position of the revolvingsystem is a great mechanical advantage. The discharge from point todisk gives a spark np to 16 inches (40 cm.) and is a shower of exceed-ingly noisy sparks. From disk to point the discharge appears totallydifferent; it is entirely noiseless and exhibits a thick yellow flame. Theform of the discharge always designates its polarity. With a Walter 6 tube in series, the full current registers about10 ma. in a Snooks meter. With this relatively small current it ispossible to take a skiagram of a stomach in one second of time withoutthe use of screens, although I generally choose a lower tube with a five-minute exposure. A two-second exposure of a renal calculus showedbetter than one taken in a woman weighing 170 pounds in 5 seconds. Ihave accomplished telerontgenography of the heart with the tube 10 feetfrom the plate and two intensifying screens