Word: ores
(lookup in dictionary)
(lookup stats)
Dates: during 1930-1939
Sort By: most recent first
(reverse)
Since 1923, not a single pound of Canadian iron ore has been produced. The 2,000,000 tons of ore a year required by Canada's iron & steel industry are imported from Newfoundland and the U. S. It was therefore news last week when the Northern Miner (Toronto) reported that Canadian iron would soon be coming up from a big ore body beneath M-shaped Steep Rock Lake, located about 100 miles north of Minnesota's great Mesaba Range...
...prospector named Jules Cross became convinced there was iron under the lake. After he met up with Joseph Errington, a prosperous oldtime mining man, professional geologists definitely established existence of the ore body. The two promoters feel sure of at least 100,000,000 tons in the property they have now bought up, and chartered as Steep Rock Iron Mines Ltd. (Joseph Errington, president), with authority from the Ontario Government to issue 5,000,000 shares...
Trip 6 got away safely from Medford, Ore. after midnight, with seven radio ranges, their beams running in four quadrants, to guide him to Oakland. But at Medford, Stead had already made his first blunder. He failed to fill his gasoline tanks. From Medford, on instruments, against a heavy headwind and an hour behind schedule, he went down the south leg of the Fort Jones range, passed the Red Bluff localizer, reported that the Sacramento range was drowning out the Williams beam (which ground stations reported was operating without interference). Then, for almost an hour, Trip 6 was silent...
...Hardinge's son, Harlowe, vice president and general manager of Hardinge Co. of York, Pa., studied his father's "ball mill" in operation. There was a certain rate of feeding in ore at which it performed most efficiently, and that rate could be estimated by sound. When the feed was too slow, the noisy clatter of the mill increased; when too fast, the sound was muffled. Workmen were trained to listen for these changes in sound and manipulate the ore flow accordingly. But Harlowe Hardinge noticed that the listeners' judgment was likely to vary as much...
...most efficient level, the microphone current keeps a galvanometer balanced between two contacts. If it rises or falls as little as one-quarter of a decibel, the galvanometer makes contact on one side or the other, closing a circuit which starts or stops the flow of ore as the situation requires. More than 75 of these electric ears are already...