266
ANALYTICAL EDITION
seen ih the photograph of the water still and atorage system of the Aluminum Research Laboratories (Figure 1). Figure 2 shows the detail of the arrangement whereby the distilled water discharged from the still condenser drops through air for a few inches before entering the storage system. Additional evidence as to the satisfactory character of distilled water handled in aluminum svstems is derived from an examination of blank determinatik run in connection with analyses for RzO, content. These blank determinations in the Aluminum Research Laboratories, which cover all reagents including distilled water used in analyzing the sample, never exceed 0,001 gram of RzOs.
Vol. 5, No. 4
CONCLUSIONS The usefulness of aluminum for handling distilled water is shown by the fact that it does not seriously distilled water, it is available in a variety of wrought and cast forms, it is easy to erect and assemble, and the system may be easily disassembled in such procedure is de&
-,
aoie.
LITERATURE CITED (1) Cox, Schwartse, Hann, and Unangat, IND. ENQ.CHEM.,24, 403
(1932).
RECE~IVED March 24, 1933.
A Convenient, Inexpensive Water-Motor Stirrer RALPHE. DUNBAR,Madison, Wis.
S
OME elementary knowledge and experience in glassblowing is desirable in constructing this motor stirrer. Two glass side arms B and C are attached to a 125- or 150-ml. Erlenmeyer flask A . The flask is closed with a one-hole rubber stopper carrying an arrangement of small glass tubing, similar to the familiar mercury seal, as illustrated at D. The
glass stirring rod, extending through this stopper and seal, has a small stopper G attached to the upper end. This stopper G has inserted in slits in its upper portion small vanes of metal made of copper, aluminum, or similar metal, crossing a t right angles as illustrated a t F. A small glass jet E is introduced through the side arm a t B, and held in place by a short length of rubber tubing. Suitable lengths of laboratory rubber tubing connected a t B and C are added to carry the water to and from the flask. This entire arrangement is vividly shown in Figure 1. Figure 2 shows an end view from above of the arrangement of this jet E and the vanes for driving the stirrer. This stirrer is clamped to a ring stand with small laboratory clamp with the flask in an inverted position as shown, when it is to be used. The stirrer is put in motion by merely introducing a stream of water from the usual laboratory outlet through the jet E. The waste water leaves the flask through C. It is desirable to have the outlet C larger than the intake at B to prevent the unnecessary accumulation of water within the flask. This stirrer will be found especially convenient for melting point baths and similar small containers. It may also be used with the usual organic reaction vessel or flask, even where it is necessary to attach an additional mercury seal at the mouth of the second reaction flask. I n case it is not convenient to attach the two side arms B and C to the small Erlenmeyer flask as illustrated in Figure 1, a three-hole rubber stopper may be substituted as illustrated in Figure 3. The stream of water enters through K and leaves through H . Otherwise the arrangement is the same. A wide-mouthed flask will permit a larger and more efficient type of construction in either case than the usual narrowmouthed Erlenmeyer flask. I n the type of construction illustrated in Figure 3 even a small wide-mouthed bottle may be used. R E C E I ~ EApril D 19, 1933.
CAMPHOR.Approximately 60 per cent of the cam hor duced in Japan during 1931 and 1932 came from tKe ISK;~ of Taiwan (Formosa), and the remaining 40 per cent originated in Japan proger, chiefly in the Island of Kyushu, according t o information made available by the Department of Commerce. During the year ended March 31, 1931, the total production of crude camphor amounted to 4,585,568 pounds. In the following year the output dropped to 3,544,997 pounds. Camphor oil production totaled 17,275,246 pounds during the fiscal year 1930-31, and 15,921,621 pounds during the fiscal year 1931-32, the percentages of origin being the same as those of crude camphor. Taiwan supplied a greater quantity of natural crude and re-
fined camphor to Japan in the calendar year 1932 than in the preceding year, although the value declined markedly. Camphor oil also was obtained in larger amounts. Exports from Taiwan to Japan follow: camphor, 1931, 3,008,507 pounds; 1932, 3,138,202 pounds; camphor oil, 1931, 7,237,701 pounds; 1932, 8,403,116 pounds. Exports of camphor direct from Taiwan to the United States declined from 1,814,918 pounds in 1931 to 1,483,360 pounds in 1932, while shipments to other countries gained from 299,820 pounds to 580,346 pounds, respectively. Increased exports of camphor from Japan proper occurred in 1932, the total amounting t o 3,107,287 pounds, compared with 2,783,615 pounds in 1931. Shipments to the United States declined.
