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.Artifcial Rubies and Emeralds.-We learn
from recent letter from Dr.. Cooper, published
in the Columbia Telescope, that, at his sugges-
ton, DR.. Elicit, Professor of Chemistry in the
South Carolina College, has repeated, with prom
Use Of success, the experiment Of a French Che
mist, for the production of artificial rubies and
emeralds, by means Of pure alumine acted on by
the compound blow-pipe, with chrome as the co.
loring matter. Perfect rubies were produced by
Professor Elicit, which easily scratched an agate
seal. The basis was pure alumine, and the co.
lorng matter bchromat Of potash. If the speci-
men be taken as soon as fused, it is ruby; if the
heat be continued, the chronic acid is converted
into oxyde Of chrome; and an emerald is the re-
suit. The specimens were Of fine color, transpa-
rent, and the experiment unobjectionable and sat
lisfactory.-C Charleston Courier.