. Catalogue of dental materials, furniture, instruments, etc., for sale . is composed of two levers (TT), pivoted on two upright posts of a base-piece (U), theirinner ends connected by a socket and knuckle-joint (Y), their outer ends having looselyattached—to one a treadle (W), to the other a goose-neck or crane (X), with a lug andpin-hole for attaching to the stationary treadle of the Engine (I, Cut No. 1). The endof the base-piece under the crane is provided with a screw-hole (Y) for pivoting to thefloor at that point, thus enabling the operator to swing the treadle at the other end in afull
. Catalogue of dental materials, furniture, instruments, etc., for sale . is composed of two levers (TT), pivoted on two upright posts of a base-piece (U), theirinner ends connected by a socket and knuckle-joint (Y), their outer ends having looselyattached—to one a treadle (W), to the other a goose-neck or crane (X), with a lug andpin-hole for attaching to the stationary treadle of the Engine (I, Cut No. 1). The endof the base-piece under the crane is provided with a screw-hole (Y) for pivoting to thefloor at that point, thus enabling the operator to swing the treadle at the other end in afull circle, and to stand in any desired position. This admirable device gives the choiceof a treadle on either side of the chair without moving t^e Engine. The diagrams (CutNo. 6) suggest the positions which have been found the most convenient for the Engineand compound treadle. Price. $ DENTAL CATALOGUE. 83 Cut No. 6. Fis. 1 ^>.
Size: 1427px × 1751px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, bookidcatalogueofd, bookyear1876
