J3ARRA'I' AiYAT,YSIS OF THE IX.-Analysis of the Water of Holywell North Wales BY JAMESIhRILAT STUDENT IN THE LIVBRPOOL COLLEGE OF CHEMTSTRY. THEwell of St. Winifred at Holywell has long been noted for its salubrious qualities. There is however nothing remarkable in its composition as regards either the quantity or the quality of the substances dissolved in it excepting perhaps its freedom from organic matter; so that the salutary effects said to follow its use ought perhaps to be attributed rather to the healthiness of the locality than to any specific action of the water. The following are the results of the author's examination Temperature of the water 52' Fahr. Specific gravity of the water 1.0016. The qualitative analysis pointed out the presence of soda lime magnesia chlorine carbonic sulphuric and silicic acid.Traces of potash aud iron were detected on evaporating a very large quantity of the water but they were too minute for estimation. The residue obtained by evaporating thrse gallons of the water did not exhibit the slightest traces of iodine bromine or fluorine. Determination of the total amount of fixed constituents :-Amount of water employed. Amount of residue obtained. Per imperial gallon. 20*000grs. 8.700 grs. 30-450grs. Determination of chlorine- Amount of water employed. Amount of chloride of silver obtained. Per imperial gallon. 20.000grs. 2.9973 2595 grs. Determination of sulphuric acid- Amount of water employed. Amount of sulphateof baryta obtained. Per imperialgallon.20.000grs. 2-5473 3.060 gl's WAlER OF HOLYWELL. Determination of silicic acid- Amount of Amount of ailicic Per imperial water employed. acid obtained. gallon. 20*000grs. -782 2.737 grs. Uctermination of lime and mzgnesia- Amount of Amount of carbonate Per imperial water employed. of 1 me obtained. gallon. 90*000grs. 6.546 10.367 grs. Determination of rnaguesia in the filtrate from oxalatc of lime-Amount of Amount of pyrophosphabc Per imperial water employed of magnesia. gallon. 20.000 grs *YYO 1.242 grs. l)e termination of soda-Amount of Amount of chloride of Per imperial water employed. sodium obtained. gallon. 20.000 grs. 700 2.450 grs. Determination of carbonic acid- Two lialf' gallon bottles 11 ere filled with tlic water and chloride of calcium and arnrtionia were added-Amount of carbonic acid ex-olved.Per imperial gallon 9.145 grs. 18.310 grs. X;lopting the usnd arrangcmcut of corlibining the acids and ba%esaccording to their supposcd clmiiicul affiuities the following tabulated form is obtained :-Per imperial gallon (grains). Carbonate of lime . 13.683 Carbonate of magucbin . 2'.688 PI otocarbouate of 11oir . traces Sulyhate of 11me . 5.202 Ctllor.,ctc of sodlunl . -851 Chiode d potassium . traces Chloride of calcium . 3.094 Carbonate of soda . 1.432 Sulylrate of magucsia . traces Silicic acid . 2-737 29.689 Direct dctermiir;Aon of fixcd coristituurits 30.460 GILBERT ON Deducting from the total amount of carbonic acid the portion in combination with lime magnesia and soda the quantity of free carbonic acid amounts to 10.338 grains corresponding to 21.87’4 cubic inches in the imperial gallon.