100 



DENSITIES OF OXYfiEN AND HYDROGEN 



lime of each deterinined. Tbeii a series of tubes having all nearly the same volume, 

 ami weights of 55, GO, 05, "(•, 75, and 80, grammes weie made, and their volumes 

 determined. By the aid of these a counterpoi'^i' <>f a '_mv.'ii volume and nearly a 

 given weight could be made up in a moment. 



The combustion apparatus was then weighed by reversal, as in the case of the 

 }ialladium and of the globes containing oxygen. But few weighings wei-e required 

 for a small and light object like this. 



t „ 



Flc. 36. — Apparatus for pro- 

 ducing and weighing water. 



I'll;. 37. — Manipulator for combining oxygen 

 and hydrogen. 



G. SVNTHKSIS OK W.M'Ki; 



MAMi'ir.AiioN i\ sirrriNtJ To<iKTiii:i; iiii-: .\i-i'\i:.\tis im; 



( oMIirsTIoX. 



\\'lien the weights of the globes, of the tube containing palladium, and of the 

 combustion apparatus, had Iteen determined, the aj)paratus was put together for a 

 synthesis. First, the combustion apparatus had one of the points </, Fig. 3G, brok 



;en 



