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Scientific American, Vol. 46, No. 15 (April 1882) (1882)

leaf 4

An illustration from Scientific American, Vol. 46, No. 15 (April 1882), 1882, leaf 4
hia, Pa., has patent- NEW INVENTIONS. ed an improved back-ground frame for photographers. The A New fcteel Process. Mr. Joseph W, Blaisdell, of Brooklyn, N. Y., has patented Among the various attempts which have been made to object of this invention is to provide folding or closing scen- ery or… … having a large central aperture and an upwardly projecting ganese. The advantages claimed by the patentee for the the twisted parts of the bag together and forms a very threaded flange, the threads of which engage with those of process are its simplicity and small cost of plant, and combustible…

Patented · Boiler · Consists · Improved · Feet · Patents · Scientific American · Iron · Steam boilers · Sewing machine · Steam boiler · Tion consists · Safety valves · Steam pressure · Vention consists · Miles west · Rising grade

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