132 HISTORICAL INTRODUCTION TO CHEMISTRY CHAP. 



provided with two jets a a and a pair of wires //for a spark to 

 ignite the gas. The tube was exhausted before and after the 

 combustion ; the water produced was frozen before exhaust- 

 ing, and drying tubes b b were provided on either side in order 

 that none of the water might be lost. The gas remaining 



FIG. 32 MORLEY'S APPARATUS FOR THE COMBUSTION OF HYDROGEN 

 AND OXYGEN. 



The leads for the hydrogen (on the left) and for the oxygen (on the right), with 

 the regulating taps are hidden behind the wooden frame. _ They are joined to 

 the combustion-tube by long, flexible, glass leads, terminating in drying tubes. 

 The upper part of the combustion-chamber is surrounded by water, the lower 

 part by a freezing-mixture. 



in the chamber at the end of the experiment was collected 

 and analysed. In a typical experiment the weights were : 



Hydrogen 

 Oxygen .. 



3*8223 -O'ooi2= 3 '82 1 1 grams. 

 3 '3775-'346 = 



Total 



= 34-1640 



Water 



Whence oxygen to hydrogen 

 water to hydrogen 



= 34-1559 



= 7W 

 = 8 '939 



