NOVEMBER, 1951
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A COMPACT HYDROGEN SULFIDE GENERATOR H. B. GORDON Homestead, Florida
INRECENT years many laboratories have heen using a powdery mixture called 'LAit.ch-Tu-Ess" which, when heated, evolves hydrogen sulfide in sufficientvolume for the needs of a student. The usual arrangement of the apparatus for the purpose includes an iron laboratory stand with clamp, to hold a test tube in which the Aitch-Tn-Ess is placed. In addition, a wash bottle should be added, through which the evolved gas passes to t,he test solution. A student in one of the writer's classes (Mr. V. Koceuko) devised for his own use the arrangement shown, which eliminates the stand and clamp. The operation of the generator is essentially the same as for the equipment usually employed. The test tube is heated, either holding the burner in the hand or placing it, with properly adjusted flame, on the table beside the flask. When heating is stopped the rubber policeman, P, is removed to prevent sucking water hack into the tube during cooling. A widemouthed bottle may be used instead of the flask.
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