. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. by W. C. Wheeler (U. S. Geological Survey). ^Analysis by Stauffer Chemical Company, San Francisco. ?Analysis by Selby Smelting and Lead Company, Selby, California. ^Analysis by Booth, Garrett & Blair, Philadelphia, Pa. ^Silicates. Calcium carbonate. ^Calculated. Moisture. It appears from these analyses that some of the magnesite from theupper claims carries more iron than that from the lower group; alsothat the content of silica is variable. As has already been noted (seeintr
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. by W. C. Wheeler (U. S. Geological Survey). ^Analysis by Stauffer Chemical Company, San Francisco. ?Analysis by Selby Smelting and Lead Company, Selby, California. ^Analysis by Booth, Garrett & Blair, Philadelphia, Pa. ^Silicates. Calcium carbonate. ^Calculated. Moisture. It appears from these analyses that some of the magnesite from theupper claims carries more iron than that from the lower group; alsothat the content of silica is variable. As has already been noted (seeintroduction to Magnesite under Napa County), in the manufactureof magnesia brick for basic open-hearth liners in the steel process,a small percentage of iron (up to say 10 per cent) is not only permissi-ble but desirable. So, if the eastern market can be reached economically,it would seem that this lower grade material of the Sonoma MagnesiteCompany may be made available some day. Bibl.: Bull. 38, p. 333; Bull. 66, pp. 58, 59; U. S. G. S. Bull. 355,p. 26; Bull. 540, pp. 490-495. 332 MINES AND MINERAL Photo No. 159. Magnesite outcrop on Alfred Claim (Red Slide) of Sonoma Magnesite Company, Sonoma County, California. Sotoyome Magnesite and Mineral Paint Company (see HealdsburgPaint Company, under Mineral Paint). Sotoyome Magnesite Company (see Norton Ranch). Western Carhonic Acid Gas Company, Chas. S. Harker, Agnew,president and manager. This group is at the head of GilliamCreek, in See. 6, T. 8 N., R. 10 W., 5 miles north from Guerneville,from which it is reached by wagon road, the last mile having beenbuilt by the company. This deposit is similar to that of the Healds-burg Marble Company, above it near the top of the ridge and abouta half mile to the north. There are several large outcrops of magnesiteoccurring in serpentine. Very little development work has been done—a few surface cuts. The following analyses of material from this group are given byH. S. Gale (U. S.
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