. The Canadian journal ; a repertory of industry, science, and art ; and a record of the proceedings of the Canadian Institute. 1854.] THE CANADIAN INSTITUTE. 169 magnetic needle was placed. The enclosed magnet acted on the needle and deflected it, at a certain angle, from its natural position; but the instant that the wax melted, the magnet fell to the bottom, and the vibration of the needle indicated the fact. It was thus ascertained that under a pressure of thirteen thousand pounds on the square inch, wax requires thirt}' degrees additional heat to melt it; about one-fifth of the whole temp
. The Canadian journal ; a repertory of industry, science, and art ; and a record of the proceedings of the Canadian Institute. 1854.] THE CANADIAN INSTITUTE. 169 magnetic needle was placed. The enclosed magnet acted on the needle and deflected it, at a certain angle, from its natural position; but the instant that the wax melted, the magnet fell to the bottom, and the vibration of the needle indicated the fact. It was thus ascertained that under a pressure of thirteen thousand pounds on the square inch, wax requires thirt}' degrees additional heat to melt it; about one-fifth of the whole temperature at which it melts under the pressure of the atmosphere. During the experiment, it was observed that the plunger gradually descended in the tube, and on examination it was dis- covered that the water had, under the influence of the enormous pressure, been forced through the pores of the iron, though three quarters of an inch thick. On afterwards examining the tube closely with a lens, not the least opening could be seen by â which the water could have escaped. This result far exceeds that of the celebrated Florentine experiment, by which the in- compressibilit}^ of water was supposed to be proved by its forcing a passage through the pores of a globe of silver, very thin in comparison with the three-quarter inch iron tube. It was not ascertained whether any of the melted wax had been forced into the pores of its containing IMCOEPOSATED BY EOYAL CHAETEU. FourtSi Ordinary Mectittgj Jaaiiiary 14;tll9 1854. The following Donations to the Museum and Library of the Institute were announced : 1.âA number of Minerals and Fossils from Ireland and Canada, by Thomas Herrick. 2.âIndian Relics by Dr. Kiohardson. 3.âHay's Book of British Birds by Mr. Hope. The thanks of the Institute were ordered to be presented to Mr. Thomas Herrick, Dr. Richardson and Mr. Hope, for their valuable donations. The names of the following Candidates for Membership â were read: Leslie T'atter
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