Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc / Kolesch & Company. . ale TOR COMPUTING THE STRENGTH OF WOODEN BEAMS ) I i I ( ( I ) Ullil M! i 8 • 1 idililit I I I I I I I I I I I I I IIIIIMII II I I 1 I || |l|l|l| r|„M|„„| 4 l «.....«.!. ..1.*.1. 2 fry.*™.? », ?.,?»? I ,L,y „•„!.USti i ?» »j5»« 1 >t HNlH IH .VII I 4 1 1 1 1 ) t it aim » m it « KHim 2845 The Wager Timber Scale, a very useful and accurate Slide Rulefor computing the strength of wooden beams, joist
Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc / Kolesch & Company. . ale TOR COMPUTING THE STRENGTH OF WOODEN BEAMS ) I i I ( ( I ) Ullil M! i 8 • 1 idililit I I I I I I I I I I I I I IIIIIMII II I I 1 I || |l|l|l| r|„M|„„| 4 l «.....«.!. ..1.*.1. 2 fry.*™.? », ?.,?»? I ,L,y „•„!.USti i ?» »j5»« 1 >t HNlH IH .VII I 4 1 1 1 1 ) t it aim » m it « KHim 2845 The Wager Timber Scale, a very useful and accurate Slide Rulefor computing the strength of wooden beams, joists, etc. Made onHeavy Bristol Board, with two sliding scales. Given any of thefollowing: total load per square foot of area, total load to becarried by a single beam, length of span, distance between centers,fibre stress of wood to be used, size of timbers, or total load offloor, the most economical combination of the unknown quanti-ties can be ascertained on this scale in less than sixty more information than could be given in 500 pages oftables. Complete, with directions each, $ 94 KOLESCH <fe CO. ^K^ NEW YORK:. Barths Gear Slide Rule*. For all computations involving teeth of gear wheels, their permissible stress,pitch, velocity, carrying load, etc. An instrument so simple that verv little practiceis necessary to become familiar with it. No reference tables or diagrams are neededin its use, as within this slide rule is embodied all the information required for thesolution of problems in the strength of gearing, when the working strength of thematerial is assumed or known, 2850 Complete, with set of instructions and formula, in box each, f 2852 Barths Speed Slide Rule, for Lathes, Boring Mills, Drill Dresses,etc. Designed to supply the need of some device by which a quickand fairly accurate result can be obtained in ascertaining the cut-ting speed of a piece of work being turned up in a lathe. Also fordetermining the number
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Keywords: ., bookcentury1900, bookdecade1910, bookidillustratedc, bookyear1917
