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CONTENTS.
Page
LETTER OF TRANSMITTAL.
INTRODUCTION
Chapter I.
SUMMARY OP THE MINERAL INDUSTRY IN CALIFORNIA DURING THE
YEAR OF 1923 ^— 9
Tabulation of the Mineral Production Showing Comparative Amounts
AND Values — 1922 and 1923 11
Table Showing Comparative Mineral Production of the Various Coun-
ties in California for 1922 and 1923 12
Total Production, 1887-1923 13
Chapter II.
FUELS (HYDROCARBONS)—
Introductory ^ 14
Coal 14
Natural Gas ._ 15
Petroleum 18
METALS— Chapter III.
Introductory 33
Aluminum '. 34
Antimony 34
Arsenic 35
Beryllium 35
Bismuth 36
Cadmium 36
Cobalt 37
Copper 38
Gold ,39
Iridium. (See Platinum.)
Iron ^__ 43
Lead , 43
Manganese ^ 44
Molybdenum . . 46
Nickel 47
Osmium ^ . 47
Palladium 47
Platinum __^ .. ^^ ^ ^ ^^^"__^_1 :_. 47
Quicksilver 50
Silver . .__! 52
Tin : 54
TUNGSTEIN Jl^ 55
Vanadium l__ 57
Zinc 57
Chapter IV.
STRUCTURAL MATERIALS —
Introductory
Asphalt 58
59
Bituminous Rock 59
Brick and Tile 59
Cement . ^__; 62
Chromite ,__, _. 63
Granite . 66
Lime 68
Magnesite 69
Marble __! lui. 73
Onyx and Travertine i 74
Sandstone ^i 75
Serpentine 75
Slate 76
Stone — Miscellaneous 77
Paving Blocks 78
Grinding-Mill Pebbles 79
Sand and Gravel 80
Crushed Rock 80
