Sio 



ON CARBURETED 



Combustibility by this process is confined within 

 very narrow limits. It does not burn unless the 

 bulk of the oxygen rather exceeds its own bulk, 

 and it ceases to burn when the oxygen gas is more 

 than times the bulk of the inflammable gas. 

 The limits of combustion, according to my trials, 

 are 100 measures of inflammable gas, and 105 or 

 227 measures of oxygen gas. A mixture of 100 

 measures of inflammable gas, with 282 or 292 mea- 

 sures of oxygen gas does not burn. 



8. A good many experiments on the com- 

 bustion of this gas with oxygen by electrici- 

 ty, give the following general result : ico mea- 

 sures of the inflammable gas consume 205 mea- 

 sures of oxygen gas, and 104 measures of car- 

 bonic acid gas are formed. This result very near- 

 ly agrees with the experiments of Mr Dalton. 

 who found, as I have been informed by Dr Hen 

 ry, that ico measures of this gas require for com- 

 bustion 200 measures of oxygen gas, and form 

 100 measures of carbonic acid. The following 

 table contains a few of the experiments which I 

 made upon this gas. The others were precisely 

 of the same kind, and coincided with these as 

 nearly as possible. 



The oxygen gas used contained 12 per cent, of 

 azote. It had been prepared from hyperoxymu- 

 riate of potash, and, when recent, contained only 

 1 per cent, of azote. It had been kept above a 

 year in a crystal bottle well stopped \ but had been 



