96 Dr. Ure on Disinfection. 



impregnated with chlorine ; I allude particularly to the che- 

 mical works of Messrs. Tennant, at St. Rollox, to those of 

 Messrs. White, at Shawfield, and to Messieurs Monteith's 

 calico-print field, at Barrowfield. In the last- mentioned esta- 

 blishment, a great many tons of chloride of lime were for 

 many years treated every week with sulphuric acid, in order 

 to obtain a strong aqueous solution of chlorine. When the 

 sulphuric acid was poured into the clear watery solution of the 

 chloride, contained in a large leaden cistern, a very consider- 

 able quantity of chlorine gas escaped into the air, which com- 

 municated its peculiar odour to the whole vicinity. Chlorine 

 was also continually emitted from the above discharged liquor, 

 in the course of its application to Turkey-red cloth, for pro- 

 ducing the white figures of Bandana calicoes. Mr. George 

 Rogers, the very intelligent conductor of this magnificent esta- 

 blishment, has just favoured me with the following letter rela- 

 tive to the anti-contagious influence of chlorine. 



* My dear Sir, In answer to yours of the 24th, I have long 

 been convinced of the efficacy of chlorine in purifying con- 

 taminated or foul air, and in arresting the progress of conta- 

 gious diseases, more particularly typhus. During the long 

 period of thirty years that I have conducted this establishment, 

 with a population of two or three thousand, including their 

 families, I am not aware of a single case that could be classed 

 as contagious ; and in many hundred cases in which I have 

 recommended chlorine in the village (Barrowfield), its good 

 effects have been apparent in arresting the progress of typhus 

 and other fevers. * I am, my dear Sir, 



* With much respect, yours, 

 (Signed) f GEORGE ROGERS.* 



< Dunoon, 31st June, 1831.' 



Mr. White, who has given up making chloride of lime for a 

 good many years, and who has no interest in the sale of the 

 article, writes me, 26th June, 1831, as follows : 



' All that I can state is merely the impression among our 

 workmen, of their total immunity from fever ; and this im- 

 pression is justified by the circumstance, that while typhus was 



