The American journal of science and arts . The receiver (fig. 8.) shaped like the small end of an egg,is employed in these experiments, being mounted so as toslide up and down upon a wire. Fig. This vessel being fiiled with water, and immersed in thepneumatic cistern, the npex being just even with the surfaceof the water, one hundred measures of atmospheric air and alike quantity of nitric oxide, are to be successively residual air may then be drawn into ihe Eudiome-ter, and ejected again into the receiver through the water, topromote the absorption of the nitrous acid produ


The American journal of science and arts . The receiver (fig. 8.) shaped like the small end of an egg,is employed in these experiments, being mounted so as toslide up and down upon a wire. Fig. This vessel being fiiled with water, and immersed in thepneumatic cistern, the npex being just even with the surfaceof the water, one hundred measures of atmospheric air and alike quantity of nitric oxide, are to be successively residual air may then be drawn into ihe Eudiome-ter, and ejected again into the receiver through the water, topromote the absorption of the nitrous acid produced Lastly,it majf be measured by drawing it into the instrument, andejecting it into the egg-shaped receiver (fig. 3.), or into the air,when the quantity of it will appear, from the number of degreeswhich the sliding-rod enters during the ejection. That inthis way gas may be measured with great accuracy, may bedemonstrated by transferring any number of measures, taken 78 General Refiections on Heat. separately, into the serai-oval receiver, and subsequently re-measuring them. The Eudiometers (figs. 6 and 7 ), with the accompanyingsemi oval glass vessel, (fig. !3.) may be employed with thed


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