Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 567
op by means of weights suspended from acord attached to one end of the blocks and passing over asmall pulley or roller at one end of the table. The blockhas a flat surface on one side^ while on the opposite sidethere are four small projections or legs^ one on each corner,and each leg has a… … Fig. 223 table with its flat, or largest bearing surface down. Thissurface has an area of 8 inches by 12 inches=96 squareinches in contact with the surface of the table, and it isfound that by placing weights on the cord until the blockbegins to move, and keep moving requires a weight of 7pounds.…
