Mineral Waters at Cheltenham. 87 



fiuale of soda, lendtred both the fresh and the boiled sul- 

 phuretted water turbid. 



Experiment XVI. — Acetate and nitrate of lead produced 

 the same effect. 



Experiment XVII. — Concentrated sulphuric and nitrous 

 acid, added in large quantities to the water taken fresh 

 from the pump, caused a copious disengagement of air-bub- 

 bles. The same acids mingled with water highly concen- 

 trated by boiling, occasioned the development of a sulphu- 

 reous odour. 



Experiment XVIII. — Sulphureous acid gas passed into 

 the sulphuretted water at the fountain head etiected no 

 sensible change. 



Experiment XIX. — Oxi/genized muriatic acid gas, kept 

 in contact with the sulphuretted water, rendered it slightly 

 turbid : the colour of the fluid in contact with a measured 

 quantity of the gas was more intensely yellow than a like 

 bulk of distilled water, kept in contact with an equal bulk 

 of the gas, under equal circumstances. 

 . Experiment XX. — Sulphate of magnesia effected no 

 change when mingled with water highly concentrated by 

 evaporation. 



Experiment XXI. — ISluriate of lime rendered the sul- 

 phureited water ch^udy. 



CntMicAL Examination OF the Gaseous Contents 

 01-" THE Water. 



Experime?it XXU, — 1848 cubic inches of the sulphu- 

 retted salme water, on being evaporated in a glass retcjit to 

 J50 cubic inches, deposited a trray-coloured precipitate : the 

 super-natant fluid being decanted, tl)e powder separated by 

 the filler, and washed by the affusion of small portions of 

 distilled water, was sufl'ercd to dry spoiuaneouslv. 



Kxperintenl XXIII. — 1 he decanted fluid, together with 

 the water emploved for washing the p()« der, beino aoain 

 concentrated to 50 cubic inches, a pulvtrLihiu pn emitate 

 ensued; il was made to subside by the admixture <..>f alcohol 

 collected, dried, and added to iliat obtained in Experiuicnt 

 XXII. 



Ejperiment XXIV. — The fnilveruleut substance thus col- 

 f 4 Icclcd, 



