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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
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