Thorne, William H[enry], 1847- [from old catalog] · Philadelphia, Williams, Brown & Earle · leaf 120
DELPHIA, IMPORTERS AND MANUFACTURERS OF Mathematical and Engineering Supplies PHOTOGRAPHIC AND PROJECTION APPARATUSOF EVERY DESCRIPTION. Special attention devoted to Draughting Outfits for Colleges and Technical Schools. SOLE MANUFACTURERS OF THE BERGNER DRAWING BOARD, MARCY SCIOPTICON, LINAURA… … Plate 22 Tla*€ 22. •f*7fo.50»,Stu«L-Ttotts, J<»» C<fp6 bo Prctrvve •
Mechanical drawing
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