^mnixiu %mmtm. [April 12, 1890. 240 … how to prepare the gelatine pad, and also the aniiineink by which the copies are made: how to apply the written wreWe letter to the pad; how to take off copies of the letter. HIGHEST CRAPE ONLY. Contained in Scientific American Supplement, No. 438. Price 10 cents. For sale at this office and by all…
Patents · Munn · Air · Illustrated · Adapted · Scientific American · American supplement · Smokeless powder · Compressed air · Express money · Typhoid fever · Double star · Foreign patent · Large number · Patent office
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