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Updated: May 3, 2025
It amounted to only three-hundredths of a grain in a half pint of the soup as sent to table. Now, Christison says that quantities of 18 to 44 grains of the very soluble chloride of tin were required to kill dogs in from one to four days. Orfila says that several persons on one occasion dressed their dinner with chloride of tin, mistaking it for salt.
From three-hundredths to one-tenth of a grain of copper per gallon has been found in aërated lemonade, ginger ale, soda water, etc. In making the ultimate analysis of organic compounds by combustion, with lead chromate and metallic copper reduced by hydrogen, the results obtained are too high, on account of the expulsion of hydrogen, which had been occluded by the copper.
To photograph objects in rapid motion such as flying birds, the speed of your shutter must be at least one three-hundredths of a second and you must have a fast lens; but with a shutter speed of one one-hundredth I have taken very good pictures of things moving at a moderate rate. A walking or slowly running animal, for instance, can be taken with a shutter speed of one one-hundredth.
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