. The Philosophical magazine; a journal of theoretical, experimental and applied physics . e ice is seen to form in the water, which soon meltswithout producing any rime. The explanation of the above-described phenomenon appears tome necessarily to involve the existence of a hydiate of carbonicacid, readily dissociable, and capable of being formed by pressure,like M. Ogiers chlorhydrate of phosphuretted hydrogen. Thecritical pressure would be the dissociation-tension of the formedhydrate. The proportion of water and acid seeming to have noinfluence on the value of the critical tension, it is p
. The Philosophical magazine; a journal of theoretical, experimental and applied physics . e ice is seen to form in the water, which soon meltswithout producing any rime. The explanation of the above-described phenomenon appears tome necessarily to involve the existence of a hydiate of carbonicacid, readily dissociable, and capable of being formed by pressure,like M. Ogiers chlorhydrate of phosphuretted hydrogen. Thecritical pressure would be the dissociation-tension of the formedhydrate. The proportion of water and acid seeming to have noinfluence on the value of the critical tension, it is probable, fromM. Debrays researches, that there is only one hydrate of this acid,containing equal volumes of carbonic acid gas and aqueous order that it may readily crystallize, a portion of substancealready crystallized must be present ; the expansion of the gas,which determines a local lowering of temperature, serves to pro-duce this effect.—Comptes Rendus, Jan. 30, 1882, p. 212. * The numbers are the means of the pressures at which the rime beginsto disappear and to \\Mjr\vm>tWt^S^^ftO^W^]\<i< ^ CD CI. U^ ^C=2 CO QO
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