Jcnicz — Albuquerque, iV. Mex. — Reagan. 99 
to their becoming of value in the near future : thev are situated 
on the Ojo del Espiritu Santo land grant;' and a title to the 
area cannot now be obtained. 
The San Ysidro Springs. — The San Ysidro (San Isidro) 
springs are situated on either side of Salt river in its lower 
course all along the front of Mesa Blanco, their waters coming 
to the surface along the fault. These springs are some, forty 
in number. Those to the south of the river are bitter mag- 
nesium, and those to the north, are soda springs. The waters 
of the springs are cold. They have medical qualities ; and 
throughout the summer months, the Mexicans bathe in them. 
These springs are on government land, but, as all salt lands 
in New Mexico have been reserved for the benefit of the uni- 
versity of that territory, they will most likely be claimed b\-* 
that institution on account of the magnesium and sodium salts. 
The Analysis of the waters is as follows :13 
Specific gravity i .0023 
The mineral matter in 100 parts of water: 
Carbonate of sodium 0.3072 
Sulphate of soda 0. 1639 
Carbonate of Hme 0.0670 
Carbonate of magnesia 0.0243 
Carbonate of iron 0.0008 
Potassa ~j 
Lithia I traces 
Sih'cic acid j 
0.5632 
The Indian Springs. — The springs here designated as In- 
dian springs are a heterogeneous group, and extend in an east 
and west direction in a narrow belt of land about a mile to the 
north of the Mexican village of San Isidro. At the west their 
waters are forced to the surface along the fault to the north of 
the little gypsum area just north of Salt river. It is also highlv 
probable that' this fault extends as far east as the springs do, 
though in that part it is covered with later deposits. The springs 
are alkaline, but not depositing springs. They are cold in the 
west but increase in temperature toward the east end of the belt. 
The 'temperature of the eastern springs, those to the east of the 
Jemez river, is about 120° F. They are being covered contin- 
ually with debris brought down by an eastern arro^'a and 
must be dug out when used. The Indians use these springs 
