238 



Dr. Andrews on the Heat developed 



29. Table IV. — Ammonia. 



30. The remainder of the bases examined, being either insoluble or very 

 slightly soluble in water, were added in the solid state to the acid solution, whose 

 weight was always so adjusted as, together with that of the base, to be equal to 

 30 grammes. The bases were all taken in the anhydrous state, except lime, 

 which dissolves with extreme difficulty even in the dilute acids, unless previously 

 converted into a hydrate. The experiments performed with these bases occupied 

 from 80" to 100" longer than those with the soluble alcalis. This renders the 

 application of a new correction necessary. The method of determining the 

 amount of this correction has been already explained (23). In the remaining 

 tables, the first column contains the result as found by experiment ; the second, 

 the duration of the observation ; the third, the correction applied for the heat 

 lost thereby ; the fourth, the corrected result ; and the fifth, the difference 

 from the mean. 



