Page 37 - 1915, Springs of CA.

HOT SPRINGS. 35
The analyses indicate that the hot springs of this group are about
equal in concentration, the total mineral content being so high as to
render the waters unfit for many uses but suitable for use medicinally.
The waters are essentially primary saline in character, tertiary alka-
linity, though not fully reported, being noteworthy. The differences
with respect to primary alkalinity and secondary salinity are of
interest but are not sufficient to affect materially the character of
the waters. The cool waters are soft and only slightly mineralized.
Primary salinity, primary alkalinity, and secondary alkalinity, though
not fully reported, are prominent.
WARM SPRING IN LYTLE CANYON (SAN BERNARDINO 34).

About 13 miles in a direct line north of west from the Waterman
Springs, in Lytle Canyon, a hot spring forms a pool in the creek bed.
The water was at one time used for bathing and the place was known
as Tyler's Bath. It is now unimproved, however, the flow is small,
and the water is only about 90° in temperature. A qualitative test
of the water from this spring was made in 1876 by Loew,1 who found
it to contain 568 parts per million of solids in solution.

WARM SPRING AT BALDWIN LAKE (SAN BERNARDINO 33).

Baldwin Lake is a small intermittent water body at the upper end
of Bear Valley, in San Bernardino Mountains. In a marsh at the
western end of the lake warm water rises in a pool about 20 feet in
diameter and has been used to some extent for bathing, but as the
flow is slight and the temperature of the water is only 88° it has not
become important.

HARLEM HOT SPRING (SAN BERNARDINO 37).
Hot water formerly issued at Harlem Hot Spring on the alluvial
slope about 2 miles below the base of the San Bernardino Mountains.
A well casing has been sunk in the former spring and the water is
pumped for bathing, and in summer for irrigation also. During
periods following seasons of abundant rainfall the well overflows,
but the water level usually stands a few feet below the surface.
The property is beside an electric car line and is only a few minutes'
ride eastward from San Bernardino. It has been made a recreation
and picnic ground and the water supplies a swimming plunge and
tub and mud baths. A partial analysis of the water, which has a
local market as a table water, is tabulated beyond, with that of water
from Urbita Hot Springs. Primary salinity is dominant in both
waters.
i Loew, Oscar, U. S. Geog. Surveys W. 100th Mer., 1876, p. 196.