Reconnoissance in New Mextco.—Johnson. 87 
by a broad band of hornblendic schist, exposed for several 
hundred feet at the point we crossed it. 
In several places throughout the valley are found wells 
and springs of sulphur water,—solutions of hydrogen sul- 
phide. The only evidence of igneous disturbance being so 
far distant, it is not believed that the phenomenon can be ac- 
counted for on this basis. It is suggested that a satisfactory 
explanation is to be found in chemical reactions between the 
constituents of the soil itself, due to the decomposition of the 
organic matter found in the clays and shales of this locality. 
SACRED HEART “GEYSER SPRING.” 
By CHARLES P. BeErRKky, Minneapolis, Minn, 
Considerable attention has been attracted recently to a 
spring discovered in one of the side ravines of Hawk creek, 
Renville county, Minnesota. Excavation into a boggy slide 
about two-thirds way down a hundred-foot slope freed a large 
and steady stream of excellent .water. 
A large box was sunk into the drift and an outlet made 
for the water through a two-inch pipe pushed horizontally 
through the side of the box. This pipe is about 60 to 75 feet 
long and bends downward over the slope. It is the behavior 
of the flow from this pipe that has attracted chief attention 
and has given the name to the spring. 
The natural supply of water in the box is almost exactly 
the equivalent of the outflow possible through a two-inch pipe. 
Bending of the pipe has raised a portion of it a trifle above the 
horizontal and induced a behavior similar to a siphon. The 
flow is therefore intermittent. At the foot ‘of the pipe the 
stream increases in size and force for a total time of six min- 
utes, then the pipe flows full for one minute, followed by a 
rapid decline of flow for one minute longer. It remains qui- 
escent for about a minute and a half and then repeats the op- 
eration as before. At times a considerable noise is made in the 
box of gurgling, blowing and suction which serves the more 
to mystify curious visitors. 
It is clear, however, that the spring itself is not intermit- 
tent, that the irregularity was accidentally produced by the 
