and Attached Water. 



31 



clear drops which separate down, leaving the liquid above as 

 clear as though it had been cleared by cold. The indication 

 from a gradually ascending temperature is accordingly more 

 to be relied on than one from a falling temperature. 



When water is added to triethylamine, but little heat is 

 evolved. A very small rise in temperature occurs when the 

 30-per-cent. mixture is made. The constituents should be 

 brought to about 10°; and in the final experiment the thermo- 

 meter and thin glass bulb, in which the mixture is effected, are 

 to be previously warmed fully to the temperature at which 











Fig 



. 1. 





























































































































































































they stood at the end of the previous experiment. It is pro- 

 bable that the smallness of the heat of combination is nearly 



