. The Pharmaceutical era. not freeze absolut;- alcohol. He pro-ceeded to do so, and then said that he could freeze every-thing known in nature except hydrogen, and he thoughthe should be able to do that a little later. Merely as afurther proof of this he froze hydrochloric acid, sul-phuric acid, bromine and other chemicals. The freezingof these substances in several instances changed thecolors of them in a peculiar manner. The experimenter next performed an interesting testto show the specific gravity of the liquid. Into a largecarafe of water was poured a tumblerful of liquid first th
. The Pharmaceutical era. not freeze absolut;- alcohol. He pro-ceeded to do so, and then said that he could freeze every-thing known in nature except hydrogen, and he thoughthe should be able to do that a little later. Merely as afurther proof of this he froze hydrochloric acid, sul-phuric acid, bromine and other chemicals. The freezingof these substances in several instances changed thecolors of them in a peculiar manner. The experimenter next performed an interesting testto show the specific gravity of the liquid. Into a largecarafe of water was poured a tumblerful of liquid first this was a trifle lighter than the water, andfloated in a layer an inch or more in thickness. Thedownward impulse acquired from the act of pouring theliquid into the vessel caused a slight oscillation for a fewseconds. Then large globules of this light fluid Ijegan todive into the water. Each successive globule went lowerthan the one befor< it. but always returned to the sur- March 31, i8y8.] THE PHARMACEUTICAL ERA. 475. was half filled with Ihe luiuid air aud then set iu a basiuof water. So intense was the cold produced by the evap-oration of the air that a tilm of ice was quickly formedon the outside of the tumbler. Wheu this shell was oui^eighth of an inch thick it was detach<d from the tum-bler, now empty, by pouring intcj it a little water. Intothe ice cup thus manufactured Mr. Tripler poured an inchor two of liquid air, A burning nuitch at the end of astrip of steel ribbon was dipped into the liquid; at oncethe steel itself began to burn, sputtering and scatteringtirilliant sparks. At last the stofl literally burned in theliquid and became fused in the ice cup. There you have a very tine temperature Mr. Tripler. The burning steel represents degrees above zero; the ice cup 32° above, and theliquid air from 312 to 320 degrees below. The explosive force of the evaporating liquid air wasshown in a novel manner. .\ copper cylinder having athicknes
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Keywords: ., bookcentury1800, booksubjectdrugs, booksubjectpharmacy, bookyear1
