Addyman, Frank Thornton · London : Scott, Greenwood & co. · leaf 178
ered similar triangles, sothat the shot will be found between b and c at a distance of — •, or in the special case under consideration of = —- ab + cd * 7 + 19 = 204, or say 20 millimetres. Very good results may be obtained with these instrumentsif care be taken to keep the points of the pencils… … Fig. 48.—Punctograph Diagram. arm or leg in position, so that both hands may be free for the adjustment of the punctographs. Paynes Method.—In the above method of localisation the marks are made on the skin of the patient. This is to a certain extent an advantage, but it leads to slight…
X-rays
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