Ludy, Llewellyn V., 1875- [from old catalog], American Technical Society · Chicago, American technical society · leaf 53
lar planim-eter is one of the most simple,and as shown in Fig. 37 is aboutone-half the size of the instru-ment. It consists of two armsfree to move about a pivot and aroller graduated in square inchesand tenths of square inches. A vernier is placed with the roller sothe areas may be read in… … Fig. 37. Measuring Area of Diagram byMeans of Planimeter INSTRUCTIONS FOR USE OF PLANIMETER The diagram should be fastened to some flat unglazed surface, such as adrawing board, by means of thumb tacks, springs, or pins. The point A ispressed into the paper so that it will hold in place: B is set…
Indicators for steam-engines · Steam-engines
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
