178 J. L. Smith on the Artesian Well at Louisville. 
tional salts were precipitated; the liquid was again filtered and 
evaporated nearly to dryness—to it were added 8 oz. distilled 
water and two ounces of milk of lime, (pure lime made by igni- 
ting carbonate of lime prepared by carbonate of ammonia) the 
lime was added for the purpose of precipitating the magnesia 
and alumina—again filtered and washed; the filtered liquid was 
somewhat concentrated, and while warm, carbonate of ammonia 
added to precipitate the lime; it was then filtered and evaporated 
to about a fluid ounce and treated with a little lime water and 
carbonate of ammonia alternately, to insure the absence of the 
last traces of magnesia and lime. : 
Before going further, it would be well to state that the treat 
ment of alcohol separates the great mass of salts that are held in 
solution by the water, and which interfere with the detection of 
so minute a constituent as the lithium salt—by the aleohol we 
reduce the salts to small amounts of chlorids of magnesium, 
aluminum, calcium, sodium, potassium and lithium; by the lime 
the first two are got rid of, and by the carbonate of ammoma 
the lime is precipitated. 
_ The solution, now containing the chlorids of sodium, potas 
sium, lithium and ammonium, is evaporated to dryness, and the 
residue heated to dull redness, by which the ammonia salt 1s & 
pelled and a little organic matter destroyed ; the residue is next 
dissolved in water, and a drop or two of the liquid tested fora 
sulphate; should this be present it must be got rid of by exact 
neutralization with chlorid of barium, (a slight excess of the 
chlorid of barium will not interfere with the other steps in the 
analysis); in the examination of the water in question no tate 
added an ounce of a mixture of equal parts of pure ether 
absolute alcohol, the capsule was covered with a s 
and allowed to stand for 18 hours; the liquid was then ine 
on a small filter, and the filter washed with a little of them 
ture of ether and alcohol. The alcoholic ether solution (oy 
rated to dryness furnished the chlorid of lithium reco aires 
its well known characteristics. Although this process Tequ™ 
considerable time and some careful manipulation, its results a? 
oth accurate and satisfact 
The water of this artesian well has very valuable me ? 
