for coating and drying Order from our “Special List.’ seb 47 Ferry St., New York; 416 plates. With 15 engravings, illustrative of apparatus CLARK'S NOISELESS RUBBER WHEELS ia Federal Street, Boston. and manipulations. Contained in SCIENTIFIC AMERI- Arch St., Philadelphia; | THE JOHN T. NOYE MFG.… … giving the results of tests applied tothe glass sleepers to Only $3.00 a Year, including Postage. Weekly. ascertain their transverse resistance. [lustrated with Telegraph and Electrical THE INVENTION OF MACHINES.— 52 Numbers a Year. 7 engra’ . Contained in SCIENTIFIC AMERICAN SUP- PLEMENT, Nc 207.…
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