A Saiiitaiy Society. ']'^ 



existed in 1852. The general introduction of carbolic acid 

 and carbolates, in which the writer moved, is not included 

 here. 



The value of a smelling gas being driven into sewers 

 as a test, was also found by Mr. McDougall in his valuable 

 but little noticed experiment of disinfecting the sewage in 

 Tottenham Court Road, when the smell of the carbolic 

 acid was perceived in most of the houses, if not all, down 

 to the Thames. Prof. Allen Miller then said, 'What a 

 startling thing this is ; people complain of breathing poison, 

 and murmur against the antidote.' This was in 1859 ^^^ 

 i860. Like many other things, it required to be redis- 

 covered. The whole experience with carbolic acid was 

 wider than it is now, that is, it had more applications in 

 the minds or imaginations of Mr. McDougall and his 

 colleagues. 



