[ liv ] 



an inverted jar full of water. The 

 nitrous air, thus difengaged, riles 

 through the water, and fettles at 

 the inverted bottom of the jar. 

 Mercury yields the itrongeft nitrous 

 air, and always of the fame qua- 

 lity; but heat muft be applied for 

 its extrication, if a greater quantity 

 is in a iliort time required. I ufe 

 for convenience fake copper, from 

 which nitrous air is extracted in 

 abundance in a iliort time, without 

 applying heat. The nitrous acid 

 muft be diluted with water for the 

 purpofe. 



Inflammable air is that air which 

 rifes up in bubbles from ftagnant 

 waters, whofe bottoms are marfhy, 

 when the ground is ftirred up with 

 a flick. It is alio extracted from 

 iron, zinc, and fome other metals, 

 by diluted vitriolic or marine acid* 



This 



