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PREFACE.

The State Mining Bureau is maintained for the purpose of assisting in all possible ways in the development of California's mineral resources.

As one means of offering tangible service to the mining public, the State Mineralogist for many years has issued an annual or a biennial report reviewing in detail the mines and mineral deposits of the various counties.

The weak point in work of this character has been that the results of field investigations were so long in preparation that they had lost much of their usefulness by the time they finally appeared in print.

As a progressive forward step in advancing the interests of the mineral industry, publication of the Annual Report of the State Mineralogist in the form of monthly chapters was begun in January, 1922.

A monthly publication admits of several improvements over the old method of procedure. Each issue contains a report of the current development and mining activities of the state, prepared by the district mining engineers. Special articles dealing with various phases of mining and allied subjects by members of the staff are included. Mineral production reports formerly issued as an annual statistical bulletin are published herein as soon as retums from producers are compiled. The executive activities, and those of the laboratory, museum, library, employment service and other features with which the public has had too little acquaintance are reported monthly. The assistance formerly given to producers and consumers by consultation or correspondence only, is also proffered through this medium.

While current activities of all descriptions will be reported in this Monthly Chapter, the Bureau will not discontinue its practice of issuing from time to time technical reports on special subjects. A list of such reports now available is appended hereto, and the names of new bulletins will be added to that list in the future as they are completed.

The Monthly Chapters will be subject to revision, correction and improvement. Constructive suggestions from the mining public will be gladly received, and are invited.

Beginning with the January issue the pages are numbered consecutively throughout the year, and an index to the complete reports will be included annually in the December number.

The one aim of the Mining Bureau is to increase its usefulness and to stimulate the intelligent development of the wonderful latent resources of the State of California.

‘Mining in California' is sent without charge to those on the Bureau's exchange list and to all others who make written or verbal request.

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