Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 248
ans of the spectroscope, then afterward discovered in the poresof cleveite, a mineral unearthed in Norway. Sir William Ramsayand Mr. Frederick Soddy have found helium in the gases evolvedfrom radium chloride kept as a solid for some months. The spec-trum of helium was at first invisible; it soon… … Photograph by Rice, Montreal, PROFESSOR ERNEST RUTHERFORD,McGill University, Montreal. NEW INSIGHTS 203 other words, that the helium atom is one of the secondary unitswith which the heavier atoms are built up.1 Already the phenomena of radio-activity, although of puzzlingintricacy, have greatly…
Inventions · Inventors
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