A Simple Reflux Condenser for Use with Erlenmeyer Flasks J. W. OLSON AND c. E. €'LASS Anaconda Wire and Cable Co., Hastings-on-Hudson, N.Y.
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URIKG the c o u r s e of a study on the saponification number determination of oils the authors felt the need of a reflux condenser which could be conveniently FIGURE1 used in an ordinary Erlenmeyer f 1a s k . Such a condenser as shown in Figure 1 was made-up from an ordinary 150 X 16 mm. test tube and 8-mm. glass tubing and proved so satisfactory that others of like construction have been used for boiling various solutions under refluxing conditions. The condensers can be made by anyone familiar with glassblowing technic by taking an ordinary test tube of such diameter that it will loosely fit in the Erlenmeyer flask to be
used, and sealing in tube A . Section C is then enlarged as shown to act as a support for the condenser in the flask and tube B sealed in. The condensers can be used individually, .. o r i n series a s FIGURE2 shown in Figure 2 by means of appropriate rubber tubing connections. The dimensions shown in Figure 1 are suitable for condensers for standard Erlenmeyer flasks of 250-cc. capacity. Other sizes can be used for flasks of different dimensions. RECmVnD September 9, 1935.
An Improved Liquid Absorption Tube W. D. TURNER, Columbia University, New York, N. Y.
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N IMPROVED absorption bulb for dry absorbents,
tact path of some 42 cm. in length between the gas bubbles and the liquid absorbing medium. The advantages of this outfit over other familiar designs are : Minimal outside surface: easy to wipe t o constant weight. Minimal parts: one body, one stopper, one ground joint. Minimal surface contour: low breakage. Simple, positive operation: one turn of one stopper shutting inlet and outlet short off. Minimal waste space: larger capacity completely utilized. Stable standing. Light weight. Ground joint external: not contaminated in charging. Simple construction: low cost.
such as ascarite, recently described ( I ) , has now been supplemented by a similar tube for liquid absorbents. The new unit consists of the solid absorption tube, to which has been added the familiar Friedrichs gas absorption principle, in the form of a helical coil. This unit possesses all the advantages of the original dry absorber, besides offering a con-
In praotice, this liquid absorber is followed in the combustion train by a Turner absorption bottle for solids in the customary arrangement for taking up any moisture volatilized from a liquid absorbent. Absorbers of this type are in satisfactory use a t Columbia University, and have been readily made to order by the glassblowing departments of Eimer and Amend and others.
Literature Cited (1) Turner, W. D.,
IND. ENQ.CHEM.,Anal. Ed., 3, 63 (1931).
RECEIVED November 1, 1935.
FIGURE 1. LIQUID ABSORPTION BOTTLE Round glass body 1 2 . external stopper, 3 4. latoral tubes 5 . g;o;nd joint 6; tube and
cAil attached to'inher side of body nepk, 7,.8; open foot of coil, 9; hole communicating wlth top interior, 10; liquid level in charging, 11.
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