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Scientific American, Vol. 84, No. 10 (1901) (1901)
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nterest. The “mantle” of the Welsbach light is an ash con- As yet no attempts have been made to establish On completing the first machine some time ago it sisting mainly of the oxides of certain rare metals— speed records. Otherwise the tests are reported to be lanthanum, yttrium, very encouraging.… … a Bunsen burner to the bird feeding and for top. The cotton burns condimental and medic- AND BUCKET. © 1901 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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