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Scientific American, Vol. 56, No. 7 (February 1887) (1887)

leaf 8

An illustration from Scientific American, Vol. 56, No. 7 (February 1887), 1887, leaf 8
t to hold water, but naturalists have proved it to be altogether upon hardness; many hard substances, varies in color from bright red to purple red, and ex- merely a temporary air chamber, and closely connected as, for example, glass, scratch with great readiaeM ists in several degrees of fineness,… … THE ATJ3TEALIAN BUSTARD. he is termed "throwing off," but a display of this metallic surface to an extent quite inferior to oxide of Rouge is used to " color " metal work and to polish kind can only be seen early in the morning or at sun- iron when in a state of fineness similar to rouge or glass;…

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