206 



morey: a new autoclave 



where it is completely surrounded by metal, the sides of the cover 

 being a close fit. This type of closure is the same as that de- 

 scribed in a previous paper 1 for closing bombs at high pressures 

 and temperatures. As emphasized therein, it is essential that 

 the washer be completely enclosed by metal, so that when pressure 

 is applied it cannot flow away. 



Fig. 1. Photograph of the parts of the autoclave 



The cover is held in place by being pressed against the pro- 

 jecting rim of the outer shell by the bolt, EE, which is threaded 



1 Morey. Journ. Am. Chem. Soc, 36: 215-30. 1914; Zeits. anorg. Chem., 

 86: 305-24. 1914. 



