The Canada Medical Record Vol 14

Author : F. Wayland Campbell
Publisher : Forgotten Books
ISBN 13 : 9781334423215
Total Pages : 64 pages
Book Rating : 4.4/5 (232 download)

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Download or read book Canada Medical Record, Vol. 31 written by F. Wayland Campbell and published by Forgotten Books. This book was released on 2016-11-26 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Canada Medical Record, Vol. 31: A Monthly Journal of Medicine and Surgery; June, 1908 They usually consist of an oak case more or less solidly put together, supposed to be air-tight, fitted with glass panels front and back, and 2 removable glass doors or panels, usually lined with felt or rubber at points of contact, and closing both ends of the case which usually measures 4 feet in height and in breadth and about 2 feet in depth. This is usually supported on a four-legged table of same size, which may or may not contain drawers for storing any accessories of the machine. On an axle fixed horizontally in the case the disks are placed, and it is in the nature and the arrangement of the plates, that the machines mostly differ. The diameter of the plates or disks is usually 28 to 30 inches, other sizes being exceptional. The material used is usually glass, the common and the coarser the better, although for the sake of appearance a polished and accu rately turned truerunning plate would be more eligible. Some use mica plates instead of glass, and in this case, the plates need not be of so large a diameter, because a much greater speed can be used, and the ampere-volts of the current generated is partly dependent on speed. Glass plates on account of their fragility need to be treated with greater care. Any non-conductive material may be used in the construction of plates or disks, and I believe, asbestos, papier mache, the so-called red-fibre, etc., will be used at some future date for plate-making. Mica plates are made by pasting and shellacing thin pieces of mica together and compressing them in moulds of the exact size of the plate desired; most of the glass plates used in this country are imported from Belgium, but any glass-cutting establishment can make plates, even in the good city of Montreal, at Pilkington Bros., only you have to pay a great deal for the plates, and which would be liable to wobble.244 the static machine. In the general arrangement of the plates of a static machine, one set of plates are stationary, and the other rotatable. The comparison of the ampere voltage of static machines is made by comparison of the number of plates, but even here there is no uniform standard, for certain makers, Waite Bartlett, New York, only take account of the revolving plates, e., disks, because the stationary are not disks at all or plates in the common acceptation of the term, whilst others number all the plates whether stationary or revolving. For therapeutic purposes a ma chine with 8 revolving plates is amply sufiicient unless it be in very exceptional cases. For either uoroscopic or skiagraphic work involving deeper structures of the abdo men or pelvis, 10 to 18 revolving plates may be necessary. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."