Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 28
RS OR SPACERS. This instrument should be held in the same manner as de-scribed for the compass. It is very useful in laying off equaldistances on straight lines or circles. To divide a given lineinto any number of equal parts with the dividers, say 12, itis best to divide the line into three or… … Fig. 17. of the given line. Care should be taken not to make holes inthe paper with the spacers, as it is difficult to ink over themwithout blotting. THE SPRING BOWS. These instruments are valuable for drawing the small cir-cles and arcs of circles. It is very important that all the 14 MECHANICAL…
