The Laboratory Use of Acetylene Gas

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IT is evident from Mr. Munby's letter, in your issue for March 25, that he is unaware that atmospheric burners adjusted for acetylene gas are, and have been for some time, articles of ordinary commerce. Up to the present time no satisfactory method has been found by which large and powerful Bunsen flames can be obtained free from smoking, as the mixture of acetylene gas with a small proportion of air is very explosive, and the Bunsen tubes used must not exceed 3-16 inch diameter. Any ordinary Bunsen adjusted for 20-candle coal gas, if not exceeding the bore stated, will be found fairly satisfactory with acetylene, the gas pressure being not less than 5 inches of water; but the best results are obtained from burners rather different in proportions from the ordinary laboratory Bunsen.

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