. Transactions of the American Philosophical Society. Le col-extinction du réservoir, ces effets devraient être successivelyof productifs un intérieur et une pression extérieure sur les surfaces de l'pipesemployed. Il y a quelques années, un tuyau a été présenté à moi par M. Ewing, qui, bien que situé comme ci-dessus décrite, avait été écrasée par une force d'whichseemed ont dépassé tout ce qui pourrait, en aucun cas, s'attendre à partir de la pression de l'atmosphère. Peut-être une adhe-sion entre l'eau et la surface métallique, peuvent coopérer dans theproduction de tels résultats. VOL. C. - 5 B L'ARTICLE XXV. Sund

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. Transactions of the American Philosophical Society. the col-lapse of the reservoir, these effects should be productive successivelyof an inward and an outward pressure upon the surfaces of the pipesemployed. Some years ago, a pipe was submitted to me by Mr Ewing, which, while situated as above described, had been crushed by a force whichseemed to have exceeded any which could, under any circumstances, be expected from the pressure of the atmosphere. Possibly an adhe-sion between the water and the metallic surface, may co-operate in theproduction of such results. VOL. V. — 5 B ARTICLE XXV. Sundry Improvements in Apparatus, or Manipulation. By R. Hare, M. D., fyc, fyc, fyc. IMPROYED CRYOPHORUS. Two flasks, of which the necks have flanged orifices, are so se-cured in a wooden frame, that by the pressure of screws S S, andgum-elastic disks, the orifices of a tube are made to form with themseverally, air tight junctures. The orifices of the tube are furnishedwith brass flanges, which correspond with those terminating the necksof the flasks.. Midway between the junctures a female screw is soldered to thetube for the insertion of a valve cock V, by means of which, and a 400 SUNDRY IMPROVEMENTS IN flexible tube extending to an air pump, the flasks may be exhausted, and then closed. A small quantity of water having been previouslyintroduced into one of them, if, while the exhaustion is sustained, theother flask be refrigerated by ice and salt, the water will be frozen.* The intelligent chemist will perceive that this apparatus may be ap-plied to the purpose of desiccation by placing the article to be driedin one receptacle, and quick lime, chloride of calcium, or concentratedsulphuric acid, in the other. The orifice of the receptacles may bemade larger without inconvenience. Two large cylinders, for instance, may be used. I propose, as soon as I have leisure, to apply the principle illustratedby this apparatus, to the distillation or desiccation of many substanceswhich are li

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