Rudimentary treatise on the erection of dwelling-houses : illustrated by a perspective view, plans, elevations, and sections of a pair of semi-detached villas with the specification, quantities, and estimates and every requisite detail, in sequence, for their construction and finishing / by S.H. Brooks. (1874)
Brooks, S. H. (Samuel H.) · London : Lockwood · leaf 100
n to the screw, the divisionson the head show what fraction of a turn has beengiven, and if it be known what number of turns orthreads of the screw are equal to one inch, the points of SrRING DIVIDERS. 79 these compasses may be thus set to any small definitemeasure of length with the utmost… … Spring Dividers. This instrument, represented in the accompanyingdiagram, is particularly useful for repeating divisionsof a small but equal extent—a practice that has thename of stepping, for which a small pair of haircompasses would also be found useful when the head isconstructed as shown in the…
Building · Architecture, Domestic
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