*** Source: Thompson, Robert A., Historical and descriptive sketch of Sonoma County, California. Philadelphia: L.H. Everts & Co., 1877, 122 pgs. Notice: This data is donated to the Public Domain by TAG, 2004, and may be copied freely by anyone to anywhere. *** ---page 35--- at a cost which does not exceed ten cents a ton, on an incline on hundred and fifty feet long. The monthly production of a mine with an Eames fine-ore rotary furnace, is about two hundred flasks of metal a month. Total amount produced, about one thousand flasks. The mine looks well, and in a few years will produce metal in large quantities. The Mount Jackson is also a very promising mine. Work was commenced on it in 1873, and has not stopped for a single day. There are two thousand two hundred feet of tunnel in this mine--four furnaces have been built, and four hun- dred and forty-three flasks of metal have been taken out; of this amount three hundred and fifty have been produced in the last four months. A new tunnel is now underway, which will be six hundred feet long, giving one hundred feet in depth on the ledge. Since first commencing work eighty-five thousand dollars have been expended on the mine. The Mount Jackson will one day fully equal the expectations of its owners. We have mentioned specially only the four leading mines--there are a num- ber of others which can be worked to advantage whenever the owners are ready to develop them. If the demand would justify it, the quicksilver mines of Sonoma could be made to produce from three to five thousand flakes of mer- cury a month. There are a number of very promising viens of copper ore in this county, but none have been sufficiently worked to prove their value. In many parts of Sonoma county coal indications have been found, but none have been fully developed. There is a ledge near the town of Santa Rosa, in Cotate or Taylor mountain, which is opening with most flattering prospects of success. Coal has been taken from this mine, which is not surpassed by any yet discovered on this coast. The coals of the Pacific are all inferior to the Eastern coals. They are rather a lignite than a true coal. They do not coke but burn to ashes like wood; for domestic and steam use they answer admir- ably. A company composed of the wealthiest citizens of Sonoma county, with ample capital, has been organized to work Taylor Mountain mine, and there is every reason to believe that we are on the eve of opening up a deposit of coal which will be more valuable than any gold mine in the State. Should coal be added to our products it would soon put Sonoma county in the first rank of manufacturing counties, as it is now first in wine, fruit, dairy, lumber and other products of the soil. THE GEYSERS. Among the noted springs and places of interest in Sonoma county, the Gey- sers are justly entitled to pre-eminence. They are located in the Mayacmas range of mountains, one thousand seven hundred feet above the sea-level. Im- agine a clear, bold stream, a rod wide, flowing through a great caņon, with lofty mountains upon either side. Imagine a vast trench, a quarter of a mile long, appropriately called the "Devil's caņon," cutting the mountain, on the east side of the creek, at right-angles; in this trench or cut are the water and steam jets which form the Geysers. The springs, uniting their waters, make up a stream hissing hot, which falls into Pluto creek. We will not attempt a description, further than to say that the sides of this trench are scorched and *** end ***