Rudimentary treatise on the erection of dwelling-houses : illustrated by a perspective view, plans, elevations, and sections of a pair of semi-detached villas ... (1877)
Brooks, S. H. (Samuel H.) · London : C. Lockwood & Co. · leaf 100
79 SPRING DIVIDERS. these compasses may be thus set to any small definite measure of length with the utmost precision. The index or zero for reading the fraction of a turn of the screw is marked on the point limb below b : thus this instrument may be considered as a beam compass of small dimensions… … Spring Dividers. This instrument, represented in the accompanying diagram, is particularly useful for repeating divisions of a small but equal extent— a practice that has the name of stepping, for which a small pair of hair compasses would also be found useful when the head is constructed as shown…
House construction
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
