the center for some 75feet. The dredger is fitted with a power winch with sixdrums, all being under the control of one man. Fourof these drums carry lines running from the four cor-ners of the dredger, the other end of the lines being af-fixed to dead men or backers on the beach. Thefifth drum… … RIVER GOLD DREDGE ON THE YUBA RIVER-CAPACITY, 2,000 CUBIC YARDS PER DAY. amount of refrigeration required, it volatilizes, and inso doing produces extreme cold which absorbs the heatfrom the surrounding atmosphere. At this loweredtemperature the gas then passes into coils of pipewhich are arranged…
Grammes · Foreign · Refrigerating · Bicycle · Scientific American · Coil · Riverside drive · Large number · Foreign object · Distortion caused · American supplement · Steam navigation · Sewing machine · Years ago · Foreign Countries
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