Word: copper
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Dates: during 1930-1939
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...Upper Michigan copper and iron mines increased their work week from three to five days...
...phosphate (5,900 tons) and rosin (600 barrels) were confiscated by Britain, ordered sold at public auction. From the Nieuw Amsterdam were taken two German spies (one of whom attempted suicide), 34 German stewards and sailors. The Dutch Government was allowed to take title to 1,500 tons of copper aboard...
...window pane, but the crystals of the frost patterns were very different. Dr. Pfeiffer had a hunch that the blood of cancer victims and the blood of healthy persons might perhaps form crystals as different as those of coffee and tea. After trying some 23 substances, he hit on copper chloride as blood's best crystallizing agent. Last week Dr. Pfeiffer and his colleague, Dr. George Miley of Philadelphia's Hahnemann Medical College, described their new test for the presence of early cancer...
...drop of blood is taken from the finger tip of a cancer suspect. The blood is dissolved in a small amount of lukewarm sterile water, mixed with copper chloride and spread on a glass microscope slide to crystallize. Healthy blood forms a green crystal pattern which, under a microscope, looks like a delicate, fan-shaped palm leaf. But in cancerous blood some unknown chemical forms a pattern of scattered, double-wing bow ties. In 1,000 trials on known cancer victims, said Drs. Pfeiffer and Miley, the copper test was 80% accurate...
...paper explained that blue crab canning has heretofore been impracticable because the crabs have unstable protein molecules, which, in the heat required for canning, release copper, cause blue copper oxide to form. By dipping the meat in a solution of sodium chloride, lactic acid and aluminum salts, the new process seals the copper into the crab proteins...