ON OLEFIANT GAS. 



333 



fired by electricity, a quantity of charcoal precipitates, and 

 the bulk of the'resldue after the detonation is much greater 

 than before. The following table exhibits the result of my 

 experiments in this way : 



In each of these experiments, a quantity of charcoal Charcoal ob 

 was precipitated. It remained long suspended in the gaseous "^^ 

 residue, quite dry, and made its escape into the air, if the 

 detonating tube was turned up. I attempted to ascertain 

 the weight of this charcoal, but was not successful. It was 

 necessary, in order to collect it on the filter, to moisten it 

 in the first place; and it was found impossible to dissipate 

 the whole of the water, without altering the filter. Hence 

 it was always a great deal too heavy, never weighing less 

 thau -Jth of a grain. 



, i 



From the preceding table we easily deduce the following : 



It 



