BY THE LIMITED APPLICATION OF HEAT. 281 



No. 1 be supplied with green sulphate of iron, the other two with concentrated 

 sulphuric acid, and let the bells be put in their respective places. 



Under these circumstances the ether will be gradually vaporized, and the 

 alcoholic elements, with some oxygen, will be absorbed by the acid, while 

 nitric oxide, being liberated, will pass into the sulphate, and be, consequently, 

 absorbed. 



From the new ether my young friend, Mr. Boye, who was, at the time, one 

 of my operative pupils, succeeded in evolving alcohol by digestion with slacked 

 lime, and subsequent distillation. The lime was found to be in the state of a 

 hypo-nitrite, giving a precipitate with the nitrate of silver. 



When, into a bell-glass containing some of the aeriform ether, a globule of 

 potassium was introduced, and touched with a red hot knob which formed the 

 termination of an iron rod, ignition took place, and the gas seemed to have 

 changed its character. I had not, however, leisure to examine it eudiometri- 

 cally. There was an odour produced which reminded me both of that of fish 

 and soap. 



VII. — 3 V 



