Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 318
al andordinary .elevation in Figs. ii8 and 119 respectively. Thetaper plug is shown at a, and the divided drumhead at b; thisis acciirately fitted to the plug a, and is fastened thereon by thenut c. Fitting accurately upon the outer cylinder (? is a double-walled ring-piece, d, upon which a… … Fig. 118. 1 ( h) J ( 1 1 1 1 1 1 1 1 1 11 / ^^ \ d 1 1 ^ i ■ a < Fig. 119. It follows that, as the taper plug a is turned, the ring-piece dis caused to move up or down, and its travel may be measuredupon a scale at/(Fig. 119). This scale is so arranged thatone division corresponds exactly to one…
Spectrum analysis
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