Experiments and Observations Relating to Various Branches of Natural Philosophy (Volume 2); With a Continuation of the Observations on Air - Softcover

Inhaltsangabe

This historic book may have numerous typos, missing text, images, or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1781. Not illustrated. Excerpt: ... NUMBER V. A Letter from Mr. John Warltire, LeBurer in Natural Vhilcfophy^ on the Firing of Infiammablt Air in close vessels. Birmingham, iSth April, 1781* SIR, I had lorig entertained an opinion that it might be determined whether heat is heavy or not, by siring inflammable air mixed With common air, and applying them to a nice balance; but as I conceived the danger of passing the electric ipark through so combustible a mixture in a close vessel to Be greater than it is, I was deterred from making the experiment; 'till, being encouraged bv you, 1 procured a copper ball, or flask, which holds three wine pints, the weight 1404. with a screw stopper adapted to it, and began with small quantities of inflammable and large quantities of com* mon air, which were fired without the least danger. I then increased the bulk of* the inflammable air to half that of the common air, which when fired made the flask very warm to my hand; and every time 1 applied a long glass tube fastened to the pipe of a pair of bellows, to blow the phlogisticated air out of the flask, I observed a smoke escape along with it. I also fired the air when the flask was under water, and did riot observe any thing escape when I perceived the heat against my hand with which I kept the ball from rising. When the stopper was unscrewed, the external air always mined into the vessel containing the phlogisticated air with some Violence. Th< The method I usually practice to mix the air« in any proportion, is accurately to fill a measure with inflammable air, and rest it in a tub, with its rim barely under water, hanging over the edge of a shelf, so far as to admit one leg of an inverted syphon, the other leg being closed, but afterwards opened, and the copper flask inverted upon it, but clos...

Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.