Engineering and Contracting . lines. Only the center and curb lineswith the black paper strip connecting the different partslaterally and diagonally are shown. These models are made on a plain drawing board, andset up over any convenient scale, from 1 ft. to 1 in. up to10 ft. to 1 in. The vertical scales are all alike and made of a brasspost, graduated to inches and tenths of an inch, firmlyattached to the base, which has three small points thatare pressed into the board to hold the instrument ver-tical. A sliding clamp encircles the post and has a notchedhole through the end for holding the t
Engineering and Contracting . lines. Only the center and curb lineswith the black paper strip connecting the different partslaterally and diagonally are shown. These models are made on a plain drawing board, andset up over any convenient scale, from 1 ft. to 1 in. up to10 ft. to 1 in. The vertical scales are all alike and made of a brasspost, graduated to inches and tenths of an inch, firmlyattached to the base, which has three small points thatare pressed into the board to hold the instrument ver-tical. A sliding clamp encircles the post and has a notchedhole through the end for holding the thread at the properheight. The readings on the post are exactly opposite thethread hole, and any one of the three points in the baseare exactly under the thread hole. The clamp moves up and down by releasing pressureon the wings of the spring, also turns horizontally insame plane around post to any point desired. After threading the model, strips of black paper arehung over the threads to accentuate the lines in Dif in elev. Dist. bet\^ of f utter Imes. dist. ordi - nates oft o 4) lU 5 m ^ Or . Centr. = fe 1 2 3 4 0 6 7 3 c ??- E-S 3 on, 4.^ d U U00 n?.. !5 00 0,54 0,.iS 00 0,4. 00 on n,fi. 01) 00 n s. 2,4 00 0,8S . 00 1 0, 00 00 1 s. 00 no 1 4 ? 00 1,13 on 1,6. 00 on 1 S . on 0,68 1,13 on SO 00 00 ? (10 0.^2 no ? 4. on 00 Kfi, on 00 !1S
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License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
