c 



(Water-gas) 

 1200 units. 



(Water-vapour, i.e. Steam) 

 1201 to 3600 units 



E 



(Gaseous-atoms) 



One volume of water equals 1800 volumes of vapour (steam) and of oxygen 

 and hydrogen gases.* 



Fig. 5. The figures represent in sections the various \velj marked but not rigid 

 forms a water molecule assumes. 



* See note 1, p. 55. 



