W. G. Mixter—Estimation of Sulphur in Coal. 91 
¢ in case d breaks; ¢ is joined to } by a collar of black-rubber. 
The U-tube e is connected with d by a rubber collar drawn over 
the latter atk; this U-tube is slightly inclined, that no liquid 
may run against the rubber connectors. The tube / connects 
@ with e; it is narrowed at both ends to 10 mm. diameter, 
Near the upper end it is jointed by a piece of black-rubber 
ce in order that the apparatus may be easily disconnected 
m. i 
Preferable—and the narrowed ends should be cut obliquely that 
Tops j bber 
ores and connections should be freed from adhering sul- 
Phur by heating in a solution of sodium hydrate. The joints 
