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percentages of antimony in the positive grids. The capacity of the cells, with one exception, was limited by the negative plates, however, and these were found to contain measurable quantities of antimony in the active material after completing 115 cycles of charge and discharge.The percentage of antimony found by analysis in the active material of the negative plates was greater in those cells in which the positive grids contained the greater percentages of antimony. The analysis for antimony was made at the conclusion of 115 cycles of charge and discharge.Local action produced at the surface of the negative plates was measured by weighing the plates at intervals while they were suspended in solutions of sulphuric acid and maintained at a constant temperature. The plates having the greatest amount of antimony in the active material sulphated the most rapidly. The negative plates from cells in which the positive grids were made of pure lead or the lead-cadmium alloys sulphated much less than the others.Positive grids of lead-cadmium alloys did not prove to be as durable as the leadantimony alloys in these experiments. The operation of negative plates was improved, however, by the absence of antimony from the positive grids. Part of the difficulty with the lead-cadmium alloys may have been caused by insufficient experience in using such material in batteries. Relief From Hay Fever by Air Conditioning. A booklet entitled "Relief From Hay Fever and Other Disorders by Means of AirConditioning," contains information on the substances, called allergens, which cause the generation of poisonous enzymes in the human body resulting in hay fever and other similar diseases. Methods of avoiding these allergens and of counteracting their effects also are given, special emphasis being placed on the therapeutic value of air conditioning. The booklet is published by the Frigidaire Corporation, Dayton, Ohio. Tables are included which show the relative ability of various hay fever plans to produce pollen, the commoner causes of pollen in a number of different cities, and the locality and time of pollination of the more common plants causing hay fever and asthma.Booklet on "The Older Employee in Industry." Details of the steps which business executives are taking to solve the problem of what to do about the employee who has grown old in a manufacturing organization are told in a new report of the Policyholders Service Bureau of the Metropolitan Life Insurance Company, entitled "The Older Employee in Industry." This report presents the findings of a broad survey conducted among 5,000 manufacturing companies. Of those replying to questionnaires, 800, which employ more than a million workers, stated that they have programs in operation for dealing with this problem. Details of these plans are tabulated and analyzed in the report. The 2 principal details are, first, dis-covery of problem cases, and second, decision as to what procedure is to be followed in these cases. In the interest of ready reference and correct summarization, 2 char...

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