rn sky during has two series of ore chambers instead of one,80as8 to treat the ore at dif saw may be operated by hand mechanism to so much advantage that one ferent degrees of temperature to remove sulphur and phosphorus, and se man may be Made to do the work of six, the whole device weighing but… … THE INTERNATIONAL OR METRIC SysTEM OF WEIGHTS AND Improved Level. o’clock in the morning, directly beneath the polar star, and Dr. John Thornley, Charlottesville, Va.—This invention relates to an MEAsURES. By J. Pickering Putnam. Price 50 cents. mprovementin the class of levels provided with a…
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