File:Popular science monthly (1872) (14780383434).jpg

Identifier: popularsciencemo89newyuoft (find matches)
Title: Popular science monthly
Year: 1872 (1870s)
Authors:
Subjects: Science
Publisher: New York : D. Appleton
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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r rows, the sides. The wood isbrought by trucks to the foot of themachine where two workmen place thebeams on the chain of the conveyor. The cross-bars carrying the fingersare provided each with two little broomsto sweep off the chips and sawdust. The saws, seventeen in number, arecircular blades twenty-six inches indiameter. They are divided into threegroups so as to avoid the vibrationswhich would result from using only oneshaft of a diameter in proportion to thatof the blades running at ihe high speedof two thousand revolutions a minute. The first two sets of saws trim otT theexterior edge of the wood and cut fourblocks each; then the following set ofseven saws ruts the central section of thebeam into blocks. After this the blocks,drawn along continually by the fingers,pass under rollers, eventually to bepushed out by the following series ofblocks. TJie blocks slide down a chuteupon tables from which workmen taketliein and throw them onto small cars. 352 Popular Science Mnnihly S.W
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The Conveyor Raised from the Sawing Table. Two Endless Belts Carry a Series of FingersMounted on Bars Running from Belt to Belt. These Grasp and Propel the Blocks 354 Popular Science Monthly Washington Monu-ment as a Motion-Picture Screen WHAT is prob-ably the largestmotion-picture screenin captivity^is claimedby the city of Wash-ington, D. C. It isnothing more or lessthan the Washingtonmonument and it hasbeen pressed into ser-vice by the resource-ful Bureau of Com-mercial Economics,which has decidedthat as long as theout-of-door publicmust have its cinemaentertainment, itcan get along with-out Mary Pickfordand Charles Chap-lin for the timebeing and subjectitself to an educa-tional and upliftmovement. It is the avowedpurpose of theBureau of Com-mercial Economicsevery once in awhile to conductmot ion - pictureshows which are to be strictly educaiional, and ilie putureswill be projected on the fair whiit sidesof the Washington monument in theCapitol city. The Bureau inaugurated its seas

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