WILLIAM GOSSAGE S3 



the roof of the chamber there should descend 

 showers of liquid sulphuric acid which should 

 assist in condensing the gases contained in 

 the chamber. It was during the Christmas of 



1856, that his mind was busy with this subject; 

 he patents one invention on the i6th Decem- 

 ber, 1856, and a second on the I7th January, 



1857. In this latter he specifies what closely 

 resembles the operations both of the Glover 

 and Gay-Lussac towers ; for he claims the 

 production of a supply of concentrated 

 sulphuric acid, by causing hot sulphurous 

 acid gas produced from ordinary sulphur 

 burners or pyrites kilns to pass through a 

 tower containing coke or other suitable 

 material, through which tower sulphuric acid 

 is also caused to pass in such a manner as to 

 be exposed to the evaporative action of such 

 hot sulphurous acid gas. Also the application 

 in the manufacture of sulphuric acid of the 

 concentrated sulphuric acid obtained by the 

 action of hot sulphurous acid gas, for the 

 purpose of absorbing nitrous gas or nitrous 

 acid. The patent also specified the apparatus 

 needed in both these operations. 



As far back as August, 1855, we find him 

 operating with the carbonate of ammonia ; 

 his invention specifies methods of forming the 



