A simple and inexpensive method of localising with x-rays / by Wm. Jas. Fleming, M.D.

  • Fleming, William James.
Date:
1898-1899
Catalogue details

Licence: Public Domain Mark

Credit: A simple and inexpensive method of localising with x-rays / by Wm. Jas. Fleming, M.D. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    to fix it. The other horizontal arm consists of a short piece of small brass tube, open at both ends, passed through the vertical bar, and firmly fixed in it. This brass tube is held in the jaws of an ordinary wooden tube stand. A plumb line is dropped from the brass tube. With this simple appliance [made for me by Messrs. Baird Tatlock, Glasgow], sufficiently accurate results may be got. The method of employing it is as follows:—The neck of the tube to be used is passed through the hole in the long arm, and adjusted so that, on looking through the brass tube, the centre of the anode is found to be opposite the centre of the brass tube. The neck is then fixed by the pinch screw, and its exact position may be marked upon the stem with ink or a morsel of gummed paper. The brass tube is now clamped in the jaws of the holder, care being taken that it is horizontal. The plumb line i3 adjusted to the distance at which it is proposed to place the anode from the plate during the exposure, and this distance is carefully noted. The vertical position of the object having been previously approxi- mately ascertained by the screen, or one or more photographs with an opaque object placed in known position on the surface, the tube is adjusted at whatever distance may be judged best from this