Americam Jounnt of Science g. Ats

 BY PROFESSOR B. SULLIVAN.
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 FENHlS work was projected ill 1917, and H commenced in July, 1918. Before that period, no Original Journal of Science had ap- peared in this country, except that of Dr BRUCE, which was limeted to Mineralogy, and ceased with the completion of the first vo- lume. The American Journal has been sus- tained more than eleven years, until it has reached its twentieth volume.

 There is sufficient evidence to shew, that it has essentially promoted some of our most i'm portant national interests. It is known and accredited, not only at home, but in the most enlightened countries of Europe; and as the leading Foreign Journals of Science are sent in exchange, and frequently quote from its pages, it has become thus identified with the progress of the Science and Arts of the pre- sent day.

 TERMs.-The terms are three dollars a 8vo. year, of two Nos. each; they were ori- ginally stipulated to contain 320 pages, but have averaged more than 400.

 The reason why the price of this Journal is one dollar higher than that of the American Quarterly Review is, that the plates and composition make it more expensive, while the patronage is more limited.

 Complete sets of all the back volumes can be furnished, at suitable discount, either in numbers or in half or full binding.

 A number of the work will be sent, gratis, asa specimen, when desired.

 G% It is expected that postage will always be paid on orders and remittances for the Journal, but not on communications for its pages