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Scientific American, Vol. 42, No. 9 (February 1880) (1880)
leaf 3
r to reproduce colors hitherto considered out of the merly, by which the friction of the parts passing each other efficiency. They have also received numerous other medals reach of photography: has been greatly reduced, and iron revolvers can be made and awards from the American Institute, New… … as gas exhausters. They worked very suc- substance which is always found to accom- cessfully, and since that time the largest and pany chlorophyl, and which seems to have best companies in the United States and Ca- some intimate relation with il. On the char- IMPROVED POSITIVE BLOWER. © 1880…Patents · Improved · Pressure · Cement · Patented · Scientific American · Boiler · Pumping system · Patent issued · American export · Rotary pressure · Practical treatise · Carbonic acid · Export edition · Oxalic acid · Low pressure
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