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Excavations at Lachish are still going on, and among other discoveries is that of an iron blast-furnace, with slag and ashes, which is supposed to have existed B.C. 1500. If the theories of experts are correct, the use of the hot-air blast instead of cold air (an improvement in iron manufacture patented by Neilson in 1828) was known fifteen hundred years before Christ. (See FURNACE.)
•LADDER occurs only once, in the account of Jacob’s vision (Genesis 28:12).