Bulletin . ther scarce; ordinarily, however, harvesting isfinished by December. Usually the salt deposit is first harvested to within 2 inches of themud floor; then the remaining lower grade is harvested separatelyand is sold for making ice cream and for stock. The salt is shoveledinto tram cars holding about a ton. The salt thus lifted has a pink-ish hue, and the mother liquors are likewise pinkish. A small loco-motive propelled by gasoline or electricity then hauls 6 or 8 cars tothe mill or to the salt piles or stacks. Small stacks are made at someplants, and at others one huge stack is made
Bulletin . ther scarce; ordinarily, however, harvesting isfinished by December. Usually the salt deposit is first harvested to within 2 inches of themud floor; then the remaining lower grade is harvested separatelyand is sold for making ice cream and for stock. The salt is shoveledinto tram cars holding about a ton. The salt thus lifted has a pink-ish hue, and the mother liquors are likewise pinkish. A small loco-motive propelled by gasoline or electricity then hauls 6 or 8 cars tothe mill or to the salt piles or stacks. Small stacks are made at someplants, and at others one huge stack is made near the mill (PL IX, A).The latter method is doubtless more economical, for it reduces boththe surface exposed to solution by rain and also that which has to bebroken in subsequent utilization of the salt. The latter considerationis important, for the surface hardens so firmly that it can be brokenonly with the greatest difficulty; indeed, the cost of breaking a par- BUREAU OF MINES EULLETI-i 146 PLATE HI. VIEW OF CRYSTALLIZING PONDS, SHOWING ONE FIELD READY TO BE SALT CO., SAN MATEO, CAL.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
