342 
APPENDIX. 
No. 253.— Incrustation from the Hot Springs of San Bernardino. —Aqueous extract contains 
only a small quantity of chloride of sodium. In hot hydrochloric acid the mass dissolved with 
strong effervescence, leaving a residue of silica and alumina. The solution contains— 
Lime, (carbonate,) chief constituent. Alumina and oxide of iron, (traces.) 
Silica, (soluble in acid.) Phosphoric acid, (trace.) 
Magnesia. 
A distinct reaction for fluorine was obtained hy heating the powdered mineral with fragments 
of marble and concentrated sulphuric acid in a dry flask, passing the gas through aq. ammo¬ 
nia, evaporating this solution to dryness, redissolving, filtering, and testing this filtrate evap¬ 
orated to dryness hy etching. This specimen deserves a complete quantitative analysis, which 
would throw much light on the character of the water of the spring. 
No. 254.— Bock impregnated with salts, Mojave Biver. —A portion digested in boiling water 
contained— 
Chloride of sodium. Sulph. magnesia. 
Chloride of calcium) Nitrate of soda, (a trace.) 
Sulphate of lime. 
No. 256.— Saline Efflorescence, Kern Lake .— 
Carbonate of soda. Traces of—Sulphates lime and magnesia. 
Sulphate of soda. Chloride of sodium. 
No. 256|.— Saline Efflorescence, Casteca Lake, Canada de las Uvas. —Soluble in water, con¬ 
tains— 
Sulphate of magnesia. Carbonate of lime. 
Sulphate of lime. Chloride of sodium. 
No. 258.— Calcareous incrustation, Cascade creek, Tejon. —Digested with hydrochloric acid, it- 
leaves a considerable residue of sand. The solution contains— 
Lime, (carbonate.) Chloride of potassium, (a trace.) 
Alumina and oxide of iron. Sulphate of magnesia. 
Chloride of sodium. Phosphoric acid, (trace.) 
No. 259.— Incrustation, Santa Anna B., Oct. 1 Xth. 
Chloride of sodium. Carbonate of soda. 
Sulphate of soda. Sulphate of magnesia, (trace.) 
No. 260.— Saline mass—Brought hy Lieut. Williamson from the mountains. 
Chloride of sodium. Sulphate of soda. 
Sulphate of lime, (little.) Sulphate of magnesia. 
No. 261.— Incrustation on the soil, Cohuilla villages, November 18.—Soluble in water. 
Chiefly—Chloride of sodium. Carbonate of lime. 
With—Sulphate of soda. Sulphate of magnesia. 
Sulphate of lime. 
No. —.— Incrustation from Soda Lake. —The aqueous solution reacts strongly alkaline. 
Contains— 
Carbonate of soda. Chloride of sodium. 
Carbonate of lime, (little.) Sulphate of magnesia, (traces.) 
The mass is easibly fusible. Residue is black and white sand. 
No. 262.— Saline crust, Colorado Desert, November 20.—Treated with water it leaves a large 
insoluble residue. 
The aqueous extract contains— 
Chloride of sodium. 
Sulphate of magnesia. 
Sulphate of lime, (small.) 
