Location: Eastern border of State, just north of Nevada County. Sierra County reported a mineral production of $733,000, consisting of gold and silver, during the year 1914, as compared with the 1913 output worth $1,010,976. Considering gold output alone, this county stands tenth; and as to total mineral yield, twenty-fifth.

Aside from the metals itemized below, Sierra County contains deposits of asbestos, chromite, iron, lead, platinum minerals, serpentine and talc.

Commercial production for 1914 was as follows:

Population: 18,800 (1910 census).

Location: Extreme north central portion of State, next Oregon boundary.

Siskiyou, fifth county in California in regard to size, located in a highly mineralized and mountainous country, ranks twenty-eighth in regard to the value of its mineral output for 1914. Although the county is traversed by a transcontinental railroad in a north and south

line, the mineral-bearing sections are almost without exception far from transportation and other facilities. A large part of the county is accessible by trail alone. Future development and exploitation will doubtless increase the productiveness of this part of the State to a great degree.

Among Siskiyou's mineral resources are: Chromite, clay, coal, copper, gems, gold, lead, limestone, marble, mineral water, pumice stone, quicksilver, sandstone, silver, and the stone industry. Commercial production for 1914 was as follows:

Population: 27,559 (1910 census).

Location: Touching San Francisco Bay on the northeast.

Solano, while mostly valley land, produced mineral substances during the year 1914 to the total value of $1,683,866, ranking fourteenth among the counties of the State. Among her mineral resources are: Bituminous rock, brick, cement, clay, fuller's earth, limestone, mineral water, natural gas, onyx, petroleum, quicksilver, salt, and the stone industry.

Commercial production for 1914 was as follows:

Sonoma.

Area: 1,577 square miles.

Population: 48,394 (1910 census).

Location: South of Mendocino County, bordering on the Pacific
Ocean.

Sonoma ranked twenty-ninth among the counties of California during the year 1914, with a mineral production of $326,144, as compared with its 1913 output worth $239,037. More paving blocks are manufactured here than in any other section of the State.

Among Sonoma's mineral resources are: Brick, chromite, clay, copper, graphite, infusorial earth, magnesite, marble, mineral paint, mineral water, quicksilver, and the stone industry. Commercial production for 1914 was as follows:

Population: 35,000 (estimated by the county board of supervisors).

Location: Center of State, bounded on south by Merced County. Gold is the chief mineral product of Stanislaus County, although brick, clay, gypsum, iron, manganese, mineral paint, quicksilver and silver are found here to some extent as well. This county, though apparently ranking forty-ninth in the State in regard to value of mineral output, is really in a higher position. In order not to reveal individual business, the gold and silver yield of its single dredge is combined with similar data under Merced County. Commercial production for 1914 was as follows:

Sutter.

Area: 608 square miles.

Population: 6,329 (1910 census).

Location: Bounded by Butte County on the north and Sacramento on the south.

Sutter is one of only two counties in the State which reported no commercial output of some kind of mineral substance during 1914. Both clay and coal exist here, but deposits of neither mineral have been placed on a productive basis.

Tehama.

Area: 2,893 square miles.

Population: 11,401 (1910 census).

Location: North central portion of the State, bounded on the north by Shasta.

Tehama stands last among the fifty-six mineral-producing counties of the State. Its mineral output during 1914 was valued at $300, as compared with the 1913 production worth $2,442.

Among its mineral resources are listed: Brick, chromite, copper, gold, marble, mineral water, salt, silver, and the stone industry. Commercial production for 1914 was as follows:

Area: 3,166 square miles.

Population: 3,301 (1910 census).

Location: Northwestern portion of State.

Trinity, like Siskiyou County, requires transportation facilities to further the development of its many and varied mineral resources. Deposits of asbestos, barytes, chromite, copper, gold, mineral water, platinum, quicksilver, silver, and building stone are known here, but with the exception of gold, very little active production of these mineral substances is possible, as yet.

In twenty-fourth place, commercial output for 1914 was as follows:

Area: 4,856 square miles.

Population: 35,440 (1910 census).

Location: Bounded by Inyo on the east, Kern on the south, Fresno on the north.

Tulare stands thirty-eighth on the list of mineral-producing counties. Her mineral resources, among others, are: Brick, clay, copper, feldspar, graphite, gems, infusorial earth, magnesite, marble, natural gas, quartz, glass sand, soapstone, stone industry, zinc. Commercial production for 1914 was as follows:

Area: 2,190 square miles.

Population: 9,979 (1910 census).

Location: East central portion of State-Mother Lode district.

Tuolumne ranks twentieth among the counties of the State relative to its total value of mineral output. As a producer of marble its standing is first.

Chromite, clay, copper, gold, lead, limestone, marble, mineral paint, platinum, soapstone, silver, and the stone industry are the leading mineral resources.