CAGNO'LI, ANTONIO, born at Zante, September 29, 1743. He was attached to the Venetian embassy at Paris, and formed a taste for astronomy and an intimacy with Lalande. He built an observatory in the Rue Richelieu, and continued to make it useful till 1786, when he went to Verona, where he built another. This last was damaged by French cannon-shot in 1797, but the owner was indemnified by General Bonaparte, who removed him to Modena. Ho was afterwards President of the Italian Society, and died at Verona in August 1816. (Lalande, 'Bibliog. Astron.' p. 599.) Cagnoli wrote a work on trigonometry, first published at Verona in Italian (1786), and translated into French by M. Chompre. The second edition of the translation bears Paris, 1808. Besides this he wrote i arieas aetronou lent treatises and papers, :neatly in the memoirs of Use Italian Society, which should be consulted from the beginning to End them. The title of these memoirs is Memork di Maternatim e Fiske delis Soeieth Italians. Modes*: Carlyslis trigonometry is one of those invaluable works which bring up the state of science completely to the time at which It Is written, and furnish Thom who want the means of application with caried *terve of methods. Elementary writers on the practical parts of
mathentatice ere among the last to adapt their rules to the actual state of science, utiles* somebody, who is well versed in the theory, redone. the service whkh Cagnoli did for trigonometry. The con sequence has teen, that works on that subject have &maimed a better fans, and the constant reference which has been made to CagnolEs treatise is the test of the frequency with which it has been used. The late Professor Woodboure, whose treatise on trigonometry has powerfully coutributed to tooter a taste for analysis in this country, remas, on a smaller seals to have taken Cagnoll for his model. The week we speak of is a quarto of 500 ;ages tin the French translation, the second edition of which is augmented by the author's consmuni cations% and treats very largely of the application of trigonometry to aeronomy and geodesy.