The microscope; an introduction to the microscopic methods and to histology (1911)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Publishing Company · leaf 98
ediately, at cost price,2/. 155. for each pair of tap and dies, and it is earnestly requested that everymaker of Microscopes will possess himself of a pair of these sizing gauges. The Council believe that at such time as these sizing taps and dies havecome into universal use the standard… … Fig. 69 Thread.— Whitworth screw, i. <?.,a V-shaped threadinclined at an angle of 550 to each other, one-sixth ofrounded off at the top and the bottom of the thread. Pitch.—36 to the inch. Length of Thread on Object-Glass 0.125 in. sides of threadthe V depth being 80 LIGHTING AND FOCUSING [ CH.…
Microscopy
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