Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Brandenburg (Kentucky, United States) or search for Brandenburg (Kentucky, United States) in all documents.

Your search returned 1 result in 1 document section:

, 282 tons hydrogen, equal to 1,250 tons anthracite coal, or the charcoal made from 5,000 cords of wood; estimated to be equal to the wood obtained by clearing 125 acres of forest, sufficient in smelting iron ores to make 700 tons of pig-iron daily. See Galaxy, January, 1876. One of the deepest, it not the very deepest, bore-hole which was ever sunk, is 24 miles south of Berlin, near the village of Sperenberg, where a small hill, composed of gypsum, crops out in the diluvial plane of Brandenburg. The presence of gypsum so near the capital caused the Prussian mining authorities to search there for rock-salt, and, in 1867, a bore-hole of 15 1/2 inch diameter was begun at that place, in the gypsum rock itself. This rock was sunk through for 273 1/2 feet, when antrydrite or antrydric sulphate of lime was met with, which, however, after a depth of only 5 feet, gave place to rock-salt, which was struck quite pure at a depth of 284 feet from the surface. The bore-hole was continued,