Experimental engineering and manual for testing. For engineers and for students in engineering laboratories (1906)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & Sons; [etc., etc.] · leaf 56
he decimal point cannot belocated by inspection of the factors, make a rough cancel-lation. Involution and evolution are readily mastered bysimple practice. Slide-rules working on the same prin-ciple are frequently made with circular or cylindrical scales,which in the Thacher and Fuller instruments… … Fig. 2.—Thachers Calculating Instrument. uated with a double set of logarithmic scales, and results inmultiplication or division can be obtained from one setting ofthe instrument, hence it is especially convenient when a seriesof numbers are to be multiplied by a common factor. Thescales in this…
Building materials · Machinery
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