Priced and illustrated catalogue of mathematical instruments...Swiss drawing instruments, transits, levels..
A priced and illustrated trade catalogue of mathematical instruments published in Philadelphia in 1867 by William Y. McAllister, offering drafting and surveying tools to professional buyers. The pictures are plain line engravings of a vernier caliper with its scale and a clynometer rule with numbered graduations, set beside short itemised descriptions. A designer might take from them the clean, technical look of precise measuring tools drawn with fine hatching and clear numerals.
