JOSIAS CHRISTOPHER GAMBLE 55 



vat-waste, involving the using up the weak 

 hydrochloric acid which was obtained, and 

 which being produced from the open rever- 

 beratory furnace was too dilute to be employed 

 in the decomposition of manganese in the 

 production of chlorine. Gossage's plan was 

 to place the green waste in layers on shelves 

 in wooden stills, to run the weak muriatic 

 acid over it, so causing sulphuretted hydrogen 

 and carbonic acid to be given off, these mixed 

 gases were passed through a further quantity 

 of the waste placed on perforated shelves, 

 such as are used in gas purifiers, and a further 

 quantity of sulphuretted hydrogen was given 

 off by the action of the carbonic acid. The 

 sulphuretted hydrogen evolved in these 

 operations was burnt with an excess of air in 

 an oven covered with a perforated arch, on 

 which was placed a layer, several feet in 

 depth, of broken bricks, and through these 

 the sulphurous acid was passed into the 

 ordinary vitriol chambers. 



Joseph Crosfield, dismayed by the demands 

 made upon their firm for damage to trees, 

 hedges, and crops, insisted on the immediate 

 adoption of Gossage's patents; to this Gamble 

 was strongly opposed, as he believed some 

 plans he had himself conceived, would 



