Show california MANGANESE AND A report entitled manganese and chromium in california known as bulletin no 76 has just been received from the printer and is now being distributed by the state mining bureau california has long been known to contain deposits of commercial ores of both chromium and manganese but only a limited production was made for many years owing to the high cost of placing these materials on the principal markets in the eastern states during the period of the world war the prices and requirement for these ores were raised greatly on account of the curtailing of imports from the principal foreign sources and because of the increased demand for steel products so far as possible all known occurrences of these ores in california were visited and examined by members of the field staff of the state mining bureau and the results of these examinations ami nations are embodied in this new bulletin the situation with regard to both manganese and chrome changed so rapidly from day to day and from week to week that the scene has been entirely transformed in the interim of completing the manuscript for such a report as this one and its issuance from the printers hands meanwhile also hostilities have ceased however the volume is still of value in that it is the only publication of recent date containing comprehensive and detailed data on the manganese and chromium resources of the entire state of california considerable information is given regarding concentration cent ration of these ores particularly of the volume is well illustrated with wilh photographs and maps copies of bulletin no 76 may be obtained for postpaid from the state minin mining g bureau ferry bundling bu idling san sail francisco or room union league building los angeles |