. Cassier's magazine. oses the electric motor is un-excelled, its compactness, readiness andartistic appearance making it a particu-larly desirable adjunct to a dentistsoffice. Through its use in connectionwith the dental engine, the dentist isable to use both his feet for the firmsupport of his body, and to relieve him-self of the laborious task of propelling afoot-wheel. Modern printing offices, bookbind-eries, and the allied trades, too, makeextensive use of electric motors. Nearly be ground in motor-driven mills, and,if the edition be a large one, it will prob-ably be printed on a press pr
. Cassier's magazine. oses the electric motor is un-excelled, its compactness, readiness andartistic appearance making it a particu-larly desirable adjunct to a dentistsoffice. Through its use in connectionwith the dental engine, the dentist isable to use both his feet for the firmsupport of his body, and to relieve him-self of the laborious task of propelling afoot-wheel. Modern printing offices, bookbind-eries, and the allied trades, too, makeextensive use of electric motors. Nearly be ground in motor-driven mills, and,if the edition be a large one, it will prob-ably be printed on a press provided withautomatic motor-driven feeders. Thesheets, as printed, are folded by amotor-driven folder. In certain classes of book work thestitching is done by a motor- driven sew-ing machine. The trimming, emboss-ing, and pressing are all done throughthe intermediary of the motor-drive,and if the printing house is thoroughlymodern, the boxes in which the booksare packed may be lowered or raised to 368 CASSIERS MAGAZINE. FIG. 25. —A HEAVY PAPER CUTTER EQUIPPED WITH A SPRAGUE ELECTRIC MOTOR the street on an electrically operatedelevator and taken to their destinationby electrically driven automobiles. Incase these books form part of the ac-quisition of one of the newer publiclibraries, they are transported from thebook-stacks to the distribution desk bymotor-driven conveyors, and finally aretaken home by the borrowers in motor-driven street cars. Electricity has played a very import-ant part in the preparation of the high-grade cuts now used for the illustrationof modern books. Nearly all of thephotographic reproductions are madeby the electric light, and this electriclight is frequently provided by meansof a motor-driven generator set taking current from the street mains of a cen-tral station, and transforming it for suit-able service with the arc lamps em-ployed. The mechanical pantograph,routers, stippling machines, and sectionshaders are practically all motor driven,and the
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