turer alluded to the The improvement has been patented by Mr. Charles uses to which liquid air had been put in estab- J. Billwiller, Nos. 31 and 33 Walker Street, New York lishing and confirming the refractive indices City, and is especially designed to facilitate the dis- of oxygen air and… … the conductivity of a vacuum tube 1 Yes; it BILLWILLER'S DISPLAY ENVELOPE. BARRETT'S DUMPING APPARATUS. had. All the vacuum tubes which Professor Dewar painted with liquid air at once began or out. The dumping of the car is effected by guides to resist the passage of electricity through .them, be…
Munn · Apparatus · Patents · Scientific American · Nitrate · Floor plans · Express money · Bell telephone · Hot water · Professor dewar · Horse power · Largest circulation · Liquid air · Carbonic acid
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