WILLIAM GOSSAGE 13 



carbonic acid gas as an agent for effecting the 

 reaction with sulphuret of calcium. The gas 

 obtained from alkali residuum by the process 

 hereinbefore indicated may at once be used, 

 but I prefer to collect it in a gasometer before 

 I use it, and when I apply it to the manufac- 

 ture of sulphuric acid, I transfer it through 

 tubes to a suitable apparatus, wherein I cause 

 it to undergo combustion. The action of car- 

 bonic acid on sulphuret of calcium contained 

 in alkali residuum, as hereinbefore described, 

 occasions the production of a quantity of 

 carbonate of lime in addition to that previously 

 contained in the residuum. I use the car- 

 bonate of lime which I obtain from the 

 residuum for purposes connected with the 

 manufacture of alkali instead of native car- 

 bonate of lime." Here we have suggested 

 almost the details of the new plant which was 

 erected more than fifty years after Gossage's 

 specification, to work the process which Mr. 

 Chance, by the expenditure of so much 

 money, and time, and labour, and with such 

 ability, has elaborated and perfected. 



Mr. Gossage himself spoke of this problem 

 of the recovery of sulphur from alkali waste 

 as a delusion. He reviews his quarter of a 

 century's work in a tone of sadness; describes 



