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. . n ascertaining the cut-ting speed of a piece of work being turned up in a lathe. Also fordetermining the number of revolutions per minute at which a pieceof work of a certain diameter must revolve in order to give a cer-tain cutting speed. Complete, with set of instructions, in box each, 2854 Barth*s Time Slide Rule, for Lathes, Boring Mills, Drill Presses, etc. Designed for obtaining the time
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. . n ascertaining the cut-ting speed of a piece of work being turned up in a lathe. Also fordetermining the number of revolutions per minute at which a pieceof work of a certain diameter must revolve in order to give a cer-tain cutting speed. Complete, with set of instructions, in box each, 2854 Barth*s Time Slide Rule, for Lathes, Boring Mills, Drill Presses, etc. Designed for obtaining the time it will take for a tool to cover a certain length of a piece of work on the lathe, when the spindle speed and feed are known. Complete, with set of instructions, in box each, Hudsons Horse Power Indicator gives at once by one setting: The indicatedhorse power of an engine ; size of cylinder required forthis power ; the piston speed ;for compound cylinders, the ratios, Hudsons Horse Power Indicator, printed on cardboard, in leather pocket case each, $ 2877 Same as 2875, on boxwood « 6 c0 2879 Same as 2875, on ivory « 11 KOLESCH <&; CO, J^K*^ NEW YORK. 95 2893. 2894 2893 2894 2895 2897 2898 The Charpentier Circular Slide Rule, as shown in illustrationabove, was designed for vest pocket use. It consists of aGerman silver disc, 2^ inches diameter, which forms the bodyof the rule. A brass ring serving as a slide is recessed in theGerman silver body and is operated by the handle. Itcompares favorably with a 5 inch slide rule, on account of itscompactness and portability* and because it is not affectedby changes of temperature each, The Boucher Watch Form Slide Rule is constructed in theform of a stem-winding double-face-watch. Compound cal-culations can be performed easily on this calculator by meansof two pointers, operated by the stemwinder, and indicatingsimultaneously on both dials each, Same as 2894, with Metal Dials
Size: 2276px × 1098px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidillustratedc, bookyear1917
