On a new Analysis of the Lucan Sulphur Spa. 259 



quantity of metallic sulphide in suspension, probably derived from 

 the material of the pump. 



The taste of the sample was that common to all sulphuretted 

 waters containing little saline matter, but was moderately brisk 

 to the palate, while the reaction to test paper was distinctly 

 alkaline, more especially after drying the paper. 



The temperature of the water as it issued from the pump was 

 7° C. (=46° F.), that of the surrounding air being 12-2° C. (=54 F.) 



The analysis at the spring proved the presence of free carbon 

 dioxide as well as sulphuretted hydrogen ; also of alkaline 

 sulphydrate and ready-formed sulphuric acid. Determinations 

 of these were made or commenced on the spot. But neither at 

 the spring nor in the laboratory did I detect any traces of thio- 

 sulphate in the fresh water, though the latter was formed in small 

 quantity by secondary change on standing. 



The water when examined with a view to its sanitary condition 

 did not afford evidence of sewage contamination, and was free 

 from nitrites, though traces of nitrates were found as a matter of 

 course. 



The following Table (I.) contains the statement of the results 

 of the determinations of the several constituents in 100,000 parts 

 of the water {i.e. centigrams per liter.) 



Table I. 

 Lucan Sulphur Spa. 



