544 Experments on the TranfmiJJicti of Heat through Fluids. 



EXPERIMENT VII. 



Into the veflel M was poured concentrated fulphuric acid, till it flood 0.6 inch above the 

 thermometer B. The temperature was 43° (that of the air). Over this was poured 

 cautioufly a fattirated aqueous folution of fulphate of pot-afh with excefs of acid, at 43°, 

 till it ftood 0.4 inch above the acid. The two liquids remained perfe£lly diftinft, as was 

 evident from the difference of their colours and confiflence j for the acid was a little 

 coloured. The furface where they joined reflefted light very ftrongly. The thermometer 

 A was fufpended, fo that its whole bulb was in the fulphate ; thermometer C was 1.366 inches 

 under the furface of the acid ; the acid began flowly to combine with the water above it, 

 and this combination gradually evolved heat. I expected that this heat would make its 

 way downwards, and raife the thermometers. The refult was as follows : 



c. 



Two 



