T. S. Hunt on the Chemistry of Natural Waters. 53 
1851. 1852, 1 
Chlorid of poem Lowe pha ica a wie ohn undet. 0324 “0182 
. 8689 "8387 “8846 
Carbonate of sci eanek vakce 1-0295 10604 “9820 
lim “0540 “0580 0253 
magnesia wie iain siaie eSoslnaa 0908 0765 0650 
« strontia undet. 0045 undet. 
“ “ 0024 “ 
ae and Slehiptiole eva PANS * 0068 : 
La Noecee Sa 1220 0730 0166 
oe iodids and bromids ........ undet. undet. undet 
Tn 1000 parts 21662 21322 19917 
A portion of barium is included with the strontium salt. The 
water contains moreover a portion of an organic acid, which 
causes it to assume a bright brown color when reduced by evap- 
oration. Acetic acid gave no precipitate with the concentrated 
and filtered water; but the subsequent addition of acetate of 
copper yielded a brown precipitate of what was regarded as 
apocrenate of copper. The organic matter of this and of many 
other mineral springs has probably a superficial origin. The 
carbonic acid was determined-in the third analysis, and was 
equal in two trials to ‘903 and ‘905. The neutral carbonates in 
this water require “452 parts of carbonic aci 
45. In the following table are given the results of the analy- 
ses of several other waters, which belong like the last to the 
fourth class. 
Taste 1V.—WaATERS OF THE FOURTH CLass. 
x 2 5, a. 5. 
Chlorid of sodium...........) °0207 0847.| °3818 “3920 cae 
potasssium......| -0496 | -0076 | -0067 | 0318 | -0169 
Sulphate Of eodacsi ri ee Ss traces. | 0215 traces.| °*0188 
potash clas cuiscated | V081 i = .ee | 0122 
Carbonate of soda 1340 | +1952 | -2301 | 11853 | -0410 
6 sro ts ee ir glares 1740 0710 0620 undet. 2480 
OE <2. Mineheme OI SSe. “1287 0278 0257 0690 
Tron, slomina, pho = are De incacct re eves “s traces, 
Silica... | 0161 | ‘0110 | +0245 «“ 2060 
In 1000 parts. “5812 | 3478 | “7523 | 15591 ee 
Tn 10,000 parts scae eeen wees awe Che? 
1. This spring was met with some years since in constructing 
a lock on the Richelieu River at St. Ours, and was enclosed in 
such a way “0 it is only accessible through a pump; so that it 
is impossible to determine the amount of water furnished by the 
elec ee or ko + ser from admixture. The water was obtained 
aia ape and is remarkable for the large Pie ae 
potassium 1000 of the water gave of 
mined as chloride a of sso 0-0565 parts, or 25-11 per 
cent, were ome of potassium Another trial gave 24-52 per 
