Sulphuretted Hydrogen Generator. 



211 



School of Mines, Freiberg, Saxony, and is still in use in the 

 chemical laboratory of that institution. While working 

 there I was much struck with the thorough effectiveness of 

 the generator and, as the pattern does not seem to be wide- 

 ly known, the following description of a generator, which I 

 constructed myself, working upon the same principles, 

 though much smaller in size, is given. 



The frame of the apparatus is made of 2£xJ in. pine, and 

 is 3 feet high. Pieces seen in end section at A, serve as 



feet ; cross pieces nailed on 

 front and back at B and C, 

 and a piece flat on the top, 

 complete the frame. B is 

 a Winchester bottle, 3 to 4 

 litres, with the bottom cut 

 off, and with its neck be- 

 tween the cross pieces at B, 

 which are cut away a little 

 on the inside to allow the 

 bottle to rest firmly ; at D, 

 on either side, a small block 

 cut out to fit the convex of 

 the bottle holds the latter 

 firmly in place. Over the 

 bottle is placed a piece of 

 sheet lead bent down at the 

 edges so as to fit outside the 

 bottle and pierced centrally 

 with a 2 J in. hole through 

 which the cylinder F passes. 

 Into the neck of E is fitted a 

 cork through which passes a 

 glass tube carrying a short 

 / root. rubber tube closed by a little 



piece of glass rod. F is a piece of 2 in. lead pipe 10 in. 

 long passing snugly through a circular piece of wood H, 1 J 

 in. thick, over the top of which it is flanged out to prevent 

 its slipping through. In cutting off the bottom of F, 4 pro- 



scaic 



