ry rays may give rise to on the formation of Niagara Falls and Gorge, Prof. tertiary rays in like manner. Radium rays have simi- Grove Karl Gilbert, of Brooklyn, prophesied that lar effects, and it should be noted that Roen'i *en rays the Niagara River will probably run dry in 3,500 years,… … no parallel to the paralysis of nerve centers produced Fig. 6.—How a Radiograph of a Frog is Made. magnet.
Inches · Illustrated · Rays · Patents · Scientific American · Feet · Gas engine · Fountain pen · American supplement · Roentgen rays · American december · Reduced silver · Type writing · Carcel lamp · Electric smelting
Internet Archive · Public domain (published before 1931). Free to use for anything.
