FORMATION OF LIGHT IN PROOF OF THEORY. 121 



tions of such proportions relatively, to approximate the 

 most approved result. With a view to enable young opera- 

 tors to act with greater safety against EXPLOSION in 

 the last proposed operation, I beg to state that I have 

 procured and used for my purposes three brass stop-cocks, 

 with adapted jets of small calibre, attached to bags of 

 caoutchouc, of capacity sufficient to hold the three gases 

 SEPARATELY, and by placing the points of the two con- 

 taining the oxygen and nitrogen in direct contact, inserted 

 in a small pipe or jet, so that they may combine when in 

 the act of uniting with the stream of hydrogen issuing 

 from the jet of the bag kept separately and containing it, 

 by applying distinct and well regulated pressure, the pro- 

 portions may be modified in discharge, to produce the best 

 possible composition of light, and by such other experi- 

 ments as may be deemed capable in their results, of confut- 

 ing or establishing satisfactorily, all or any of the points 



described in these pages, as essential in reference to 



*i rri 

 this Theory. 



. 



