Identifier: americanquarterl02amer (find matches)
Title: American quarterly of roentgenology
Year: 1909 (1900s)
Authors: American Roentgen Ray Society
Subjects: Nuclear Medicine Radiography Radiology Radiology
Publisher: Pittsburgh : American Roentgen Ray Society
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

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anipulation. Aside from the ex-posure and the chemistry of photography, other things beingequal, an under-exposed plate may be fogged if the developermoves too rapidly, as may also be an over-exposed plate ifthe developer moves too slowly. Experience has shown thata titubaling motion of the developing tray may concentrate Meisenbach : Plate Rocker 279 the precipitate of the developer so that it has an unequal ef-fect upon the plate. An under-exposed radiographic plate can often be forcedby the speed with which the solution passes over the film.By having the speed of the plate rocker under easy control,the desired effect in developing may be secured. For thispurpose a simple and effective plate rocker has been devisedby the author after having discarded titubalators and the like.The frequency with which requests for sketches and detailedconstruction from visiting surgeons who have seen it in op-eration have come to me, has prompted me to give this de-scription which may be of interest.
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The Plate Rocker (Fig. 1) has been used almost daily forover two years and has therefore been thoroughly tried out.It has required no attention during that time. The apparatuscan easily be installed by any carpenter. It consists essen-tially of two parts, a reciprocating water motor and the Rock-er. The water motor can be procured from any hardwaredealer and is ordinarily used for washing machines. It should 280 American Quarterly of Roentgenology be firmly fastened to the wall of the dark room and connectedto the water supply; the piston rod is attached to the uprightof the Rocker and the speed of the motor controlled by meansof the faucet to which it is connected. The exhaust movesto and fro with the piston rod; the water flowing from it isconveniently used to rinse the plates after they have beentaken from the developer. The Rocker proper is suspendedon the inner sides of the wooden concrete drain box andmay be built as large as desired; any number of trays canbe placed upon the pl

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