American chemical journal . t with a Richards jetpump. The tube c is the exit it passes through the stop-per it has an interior diameter ofabout 12 mm., and widens above toabout 25 mm. At one side, nearthe top, is attached an exit tube ofsuch size as to be readily connectedwith a block-tin condenser. Thistube inclines slightly upward. Thetube c is open at the top, theopening being closed by a rubberstopper carrying a funnel tube d,whose stem extends nearly to the bottom of the flask a. Theannular space about the stem of the funnel tube is filled with glassbeads, to arrest any partic
American chemical journal . t with a Richards jetpump. The tube c is the exit it passes through the stop-per it has an interior diameter ofabout 12 mm., and widens above toabout 25 mm. At one side, nearthe top, is attached an exit tube ofsuch size as to be readily connectedwith a block-tin condenser. Thistube inclines slightly upward. Thetube c is open at the top, theopening being closed by a rubberstopper carrying a funnel tube d,whose stem extends nearly to the bottom of the flask a. Theannular space about the stem of the funnel tube is filled with glassbeads, to arrest any particles of alkali which may be carried overmechanically. The exit tube of c is connected with a block-tincondenser the copper jacket of which is 38 cm. long and 5 cm. indiameter and stands at an angle of about 20° with the the lower end of the condenser is attached a glass tube dippinginto the standard acid contained in a suitable vessel. In our appa-ratus six flasks and condensers are placed side by side. The con-. Apparatus for Nitrogen Determination. 325 densers are firmly fastened to a light wooden frame, and the waterenters at one side and passes through all the condensers succes-sively. The flasks stand upon wire gauze stretched upon twohorizontal iron rods about 12 cm. apart, and are sufficiently steadiedabove by the connection with the condenser. Under each flask isa Bunsen burner, connected by means of a gas-cock with the pipewhich supplies the whole. The apparatus is placed upon a smalltable mounted on casters, and, by simply disconnecting the waterand gas, can be wheeled to one side when not in use. The operation of the apparatus is obvious from the figure. Theflask a is filled through the funnel tube d, the ammonia is evolvedthrough the tube c, b being closed by means of a pinch-cock, and. at the close of the operation the flask is emptied through b, asalready explained. Water is then poured in through d andevacuated through b, and the flask is ready for th
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherbalti, bookyear1879
