f recent invention, the flash turned his attention to the use of thoria, then a very tricities in the blank. These strains destroy much of powder is held in a reservoir rare and costly substance. After fifty or sixty hours the sensitiveness of the diaphragm. Mr. Edison there- from which charges are… … have entered the field. A Philadelphia inventor, Mar- well as a direct method of quantitatively analyzing gas EDISON PHONOGRAPH-RECORDER. cus Ruthenburg, comes to the fore with a new magnetic is the invention of C. C. Tutweiler, of Philadelphia, Pa. separator for ore. In the machines hitherto con-…
Nernst · Patents · Incandescent · Air · Lamp · Nernst lamp · Scientific American · Compressed air · River bridge · Nernst lamps · Incandescent lamps · Horse power · East river · Rain gage · Rapid transit
Internet Archive · Public domain (published before 1931). Free to use for anything.
