Experiments on the Tranfm\lfton of Heat through Fluids, 537 



two inches above the furface of the mercury. As this folution had not been filtered, 

 there were floating through it a number of opaque particles, nearly of the fame fpecific 

 gravity with the folution. By the motion of thefe I expe£led to be able to judge of the 

 currents in the hot liquid. The temperature of the mercury and of the external air was 

 41 j°* That of the carbonate, when firft tried after being poured in, 174°. The refult of 

 the experiment was as follows : 



EXPERIMENT II. 

 Thermometer B rofe during the pouring in of the carbonate to 75 °. 



