GEOLOGY-NATUR RAL HISTORY.
WILEY & PUTNAM,



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Willy FUTNAM,


I6I Broadway,
Lave ON SALE-ELEMENTS OF GEOLOGY, pre-
pared for the Of Schools and Colleges by w. s. W.
Ruschenberger, NJ d., u. Navy, &C.. illustrated by 800
gravngs-Price 20 cents.
Also Ruschenbegers First Books of Natural History
sdered by disl guished scientific every
United States be the best series Of elementary works
offered TO the public


Orders promptly supplied above and by the publishers


GRIGG x ELLIOT,
n2 6weodrrc No. North Fourth street. Philadelphia.