. Time and its measurement . ^ the master clock\\ith its pendulum and wheels, just asby any grandfathers clock SOO yearsI lid. This broad sur^•ey of time meas-uring does not permit us to go intominute mechanical details. Those\\isliing to follow up the subject v,-onldre(|uire a large horological library—and Dr. Eliots five-foot shelf would bealtogether too short to hold the good idea of the old church clocksmay be obtained from Fig. 32 which isone of mj- valued antiques. Traditionhas followed it down as the EnglishBlacksmiths Clock. It has the veryearliest ap]Dlication of the pendulum.
. Time and its measurement . ^ the master clock\\ith its pendulum and wheels, just asby any grandfathers clock SOO yearsI lid. This broad sur^•ey of time meas-uring does not permit us to go intominute mechanical details. Those\\isliing to follow up the subject v,-onldre(|uire a large horological library—and Dr. Eliots five-foot shelf would bealtogether too short to hold the good idea of the old church clocksmay be obtained from Fig. 32 which isone of mj- valued antiques. Traditionhas followed it down as the EnglishBlacksmiths Clock. It has the veryearliest ap]Dlication of the pendulum, wdiich I have markedby a star to enalile the reader to find it,is less than 3 in. long and is hung onthe verge, or pallet axle, and beats 222per minute. This clock may be safelyput at 250 years old, and contains noth-ing invented since that date. Wheelsare cast brass and all teeth laboriouslyfiled nut by hand. Pinions are solidwith the axles, or staffs, arid also filed. Fig. 36—Double-Case Watch of Repousse Work out by hand. It is put together, gener-ally by mortise, tenon and cotter, but TIME AND ITS MEASLIRI-:i\Il<:NT 43
Size: 1450px × 1723px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1900, bookdecade1900, booksubjectclocksandwatches
