Waken from your dreams of anguish; Recognize the signs of gain. Let not your own cloudy vision Hide from you the studcnt's brein. ADAIRWELLINGTON
A Convenient Suction Pump In using a suction pump, where it is desired to preserve the filtrate, I have been impressed with the desirability of some improvements on the usual flask apparatus and so have devised the filter depicted in the accompanying sketch. It has the following advantages: 1. A number of different solutions can be filtered without the necessity of cleaning the pump by simply substituting dserent beakers. 2. A small quantity of liquid can be filtered with no loss whatever by placing a beaker and test tube under the funnel. 3. There is practically no soiling of the pump. m e n necessary, cleaning is very easily accomplished. The base of the jar is screwed on in much the same manner as the cover of a fruit jar, a sealed joint being obtained by means of a rubber gasket. F. EARLEMOCK ARRON,On10 EDUCATING THE PUBLIC IN WEIGHTS AND MEASURES (Editor's Note).-This Journal is, 60th on its w n responsibility and as an oficial organ of the Division of Chemical Education of the American Chemical Society, committed to the furtherance of the metric cemfiaign. Consistent with our belief i n the desirability of n full and open discussion of all controversial matters, hweuer, we present the following comment from Mr. Dale. In the July issue of the JOURNAL o s CABMICAL EDUCATION,* Harvey A. Neville states that "the world is mostly metric." Before the World War, which has placed the English system still farther in the lead, a grouping of all countries according to their pr~dorninantsystems of measurement gave these results
* "Educating the Public in the Use of the Metric System," Tms JOURNAL, 2,593-9 (1925).
