Page 104 - 1915, Springs of CA.

98 SPRINGS OF CALIFOBNTA.

The names of the springs are apparently misleading as to their
mineral content, for the analyses show that the waters of the Mag-
nesia, Arsenic, Iron No. 3, and Geyser springs are practically identical
in character, and the water of the Soda Spring differs from them
chiefly in its greater proportion of magnesium.
A frame hotel, a large stone dining room, and four or five cottages
in 1909 provided accommodations for about 150 guests. In addition
to the mineral water tub and plunge baths, bathing facilities were
provided by a dam across the creek, which made a swimming pool.
HOT SPRINGS AT SULPHUR BANK (LAKE 38).
Near the southeast edge of the eastern arm of Clear Lake there are
abandoned sulphur and quicksilver workings. During the period of
mining, water at a temperature of 176° was encountered at the fifth
level in what is known as the Hermann shaft.1 In January, 1910,
the water stood about 15 feet below the surface in this shaft, and
its observed temperature was 120°. Many bubbles were rising and
the water had the odor of sulphureted hydrogen. About 200 yards
east of north from the shaft, in an area of decomposed basalt where
sulphur was formerly obtained, water stands in several pools and
issues from numerous vents. The highest temperature observed
in these pools was 118° in a small one over which there was a bathing
hut. Two analyses of water from this locality, made a number of
years ago, are reproduced, as they probably show the general char-
acter of the water that still rises.
Analyses of water from mine shafts at Sulphur Bank, Lake County, Cal.
[Analyst, W. H. Melville (1884?). Authority, U. S. Geol. Survey Water-Supply Paper 237. Constituents
are in parts per million.]
Hermann shaft. Parrott shaft.
Properties of reaction:
26 48
0 0
0 0
Primary alkalinity................................. . ..... 72 50
2 2
17 136
By Reacting By Reacting
Constituents. weight. values. weight. values.
1,706 74.19 1,320 57.39
25 .65 39 1.01
24 .13 1.1 .06
Calcium (Ca). . ................................................. 21 1.07 20 1.02
5.5 .45 1.6 .13
Iron (Fe).... . .................................................. .5 .02
Sulphate ( SO4) ................................................. 17 .35 466 9.70
Chloride (Cl) .................................................... 693 19.54 667 18.79
Carbonate (CO3) ............................................... 1,140 38.00 220 7.32
800 18.60 1,023 23.80
Silica (SiOs)... . ................................................ 37 1.23 42 1.39
4, 468. 5 3, 800. 2
262 11.82 1,751 79.60
4.6 .27 .74 .04
1 Becker, G. F., Geology of the quicksilver deposits of the Pacific slope: U. S. Geol. Survey Mon. 13,
p. 259,1888.