46 JOSIAS CHRISTOPHER GAMBLE 



officiate in the Strand-street Church in that 

 city. 



The process of the manufacture of bleaching 

 powder by the absorption of chlorine by 

 slacked lime was patented by Charles Ten- 

 nant, grandfather of the present Sir Charles, 

 in 1809, a d Gamble decided to erect a small 

 plant in County Monaghan to work the 

 process which Tennant had patented on the 

 other side of the Channel. How primitive 

 the plant was, may be judged from the fact 

 that his bleaching powder chambers consisted 

 of half casks inverted over a thin layer of 

 slacked lime ; he had no sulphur ovens or 

 vitriol chambers, but the sulphuric acid he 

 obtained from Tennants, of Glasgow. 



Before the year 1815 the Monaghan works 

 were abandoned for more suitable premises, 

 which Gamble built on the banks of the 

 Liffey, just below Island Bridge and above 

 Dublin, on land which he purchased from Sir 

 William Worthington, a Dublin merchant. 

 He lived in the house and had extensive garden 

 and grounds; these adjoined the works. This 

 property is at the present day occupied by 

 Mr. James Daly. Here he began to make 

 his own sulphuric acid, instead of getting it 

 from St. Rollox ; he claimed to be the first 



