. The microscope : an introduction to microscopic methods and to histology. Microscopes. CH. II] LIGHTING AND FOCUSING 79 ring, size in. diameter, and no die will be allowed to be stamped with the Society's stamp unless it will pass easily over the in. plug and will not pass over the in. ; " These taps and dies will be for sale almost immediately, at cost price, il. 15^. for each pair of tap and dies, and it is earnestly requested that every maker of Microscopes will possess himself of a pair of these sizing ; " The Council believe that at s
. The microscope : an introduction to microscopic methods and to histology. Microscopes. CH. II] LIGHTING AND FOCUSING 79 ring, size in. diameter, and no die will be allowed to be stamped with the Society's stamp unless it will pass easily over the in. plug and will not pass over the in. ; " These taps and dies will be for sale almost immediately, at cost price, il. 15^. for each pair of tap and dies, and it is earnestly requested that every maker of Microscopes will possess himself of a pair of these sizing ; " The Council believe that at such time as these sizing taps and dies have come into universal use the standard screw-thread will have been put upon a permanent basis, and complete interchangeability of all object-glasses will have been ; h 137. Screw. New Specification of the Royal Microscopical Society Standard. Fig. 69 "Thread.—Whitworth screw, i. e.,a. V-shaped thread, sides of thread inclined at an angle of 550 to each other, one-sixth of the V depth being rounded off at the top and the bottom of the thread. Pitch.—36 to the inch. Length of Thread on Object-Glass o. 125 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gage, Simon Henry, 1851-1944. Ithaca, N. Y. : Comstock Publishing Company
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