American chemical journal . y, and by means of thisthe vessels a and b may be made to communicate. Anotheropening is drilled at right angles to the first, which communicateswith an opening extending through the handle, but does notcommunicate with the first opening. By means of this, mercury Regnault and Reiset, Ann. Chim. Phys. [3] 26, 333. Frankland, Joiirn. Chem. Soc. 1868, 109. = Doyere, Ann. Chim. Phys. [3] 28, i. ^ Hempel, Analyse der Case, Braunschweig, 1880. A New Apparatus for Measuring Gases. II contained in either a ox b may be allowed to flow out through thehandle d into a cup plac
American chemical journal . y, and by means of thisthe vessels a and b may be made to communicate. Anotheropening is drilled at right angles to the first, which communicateswith an opening extending through the handle, but does notcommunicate with the first opening. By means of this, mercury Regnault and Reiset, Ann. Chim. Phys. [3] 26, 333. Frankland, Joiirn. Chem. Soc. 1868, 109. = Doyere, Ann. Chim. Phys. [3] 28, i. ^ Hempel, Analyse der Case, Braunschweig, 1880. A New Apparatus for Measuring Gases. II contained in either a ox b may be allowed to flow out through thehandle d into a cup placed beneath. The bulb b is contracted at thetop to an opening 20 mm. in diameter. This is closed by a rubberstopper carrying a bent glass tube, to which is attached the rubberpump e. To a second glass tube passing through the stopper, ashort piece of rubber tubing with a pinch-cock is attached. Bymeans of the pump e air may be forced into or withdrawn from b,as one; or the other end of the pump is attached to the glass The bulb a terminates at the top in a narrow glass tube, to whichis fused the three-way stop-cock c. The constructionof the key ofthis stop-cock is also shown in the cut. By means of it the vessel amay be allowed to communicate with the outside air, or with thetube passing to the absorption pipette, or with the gauge g. Thegauge ^ is a glass tube having a bore i mm. in diameter and bent,as shown in the figure. By pouring a few drops of water into theopen end of this tube a column of water several centimeters high 12 Keiser. in both limbs of the tube is obtained. This serves as a manometer,and enables the operator to know when the pressure of the gasequals the atmospheric pressure. To secure a uniform temperature,the bulbs a and b are surrounded by water contained in a glassvessel. This vessel for holding water is merely an inverted bottleof clear glass from which the bottom has been removed. Thehandle of the stop-cock d passes through a rubber stopper in th
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherbalti, bookyear1879
