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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
The principle of its construction had, however, been previously explained by Edward Wright. The first computation of longitude from the meridian of Greenwich Observatory was in 1679. The first magnetic chart was constructed by Dr. Halley, in 1701. It was limited to the Atlantic and Indian Oceans. Char-tom′e-ter. An instrument for measuring maps and charts. Chase. 1. (Printing.) A rectangular iron frame (a, Fig. 1255) which receives the matter from a galley, and in which it ito such close relationship to the cultivator as to render it unnecessary to trace the steps farther. In connection with the subject we must not forget the author of Horse-hoeing husbandry. Jethro Tull introduced his system of drilling crops in 1701, with the object of cultivating the plants by machinery. He published his book 1731. His system rendered the cultivator possible. The English cultivators and horse-hoes may be classed together, as no line of demarcation exists between them.
Knight's Mechanical Encyclopedia (ed. Knight), G. (search)
achine of great merit, and the invention of a Spaniard, Don Joseph de Lescatello. Worlidge, in his Husbandry, published 1669, also recommends it. It was fastened to the tail of a plow, and dropped the seed in the furrow. It was regarded as a curiosity merely, until a man appeared who was able to appreciate it. The system of drill husbandry of Britain is the invention of Jethro Tull, a farmer of Berkshire, England, who was an original thinker and innovator. He introduced his system in 1701, and published his Horse-hoeing husbandry in 1731. His special object in drilling was to put the plants in rows, which would allow them to be hoed by machinery. He brought brains and money to the scheme, and impoverished himself, being rather too far ahead of his time. As Loudon observes, he had very few followers in England for more than thirty years. He died soon after the publication of his book, and his son died in a debtors' prison, when such things were. Not so very long ago. Je
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
ng.) A strake on the inside of a vessel above the ends of the beams. It is bolted downward through the beam and shelf, and is bolted laterally through the futtock and planking. It is also secured by a fore-and-aft dowel to the beam. It forms a channel to lead the water to the scuppers. In iron vessels it assumes many different forms, according to the judgment of the builders. See beam; Spirketing. Wa′ter-wheel. A wheel which is turned by the action of water upon its floats. In 1701, a lease for 381 years was made of the 4th arch of London Bridge for water-wheel purposes, to raise water for the city of London. The 1st arch was leased in 1581 for the same purpose, for a term of 500 years. The 5th and 2d arches were leased in 1767 for 315 years for the same purpose. Fig. 7125 is an overshot water-wheel employed at Laxey, Isle of Man, for driving the pumps which drain the mines at that village; these have an extreme depth of 1,380 feet. The wheel is 72 feet 6 inche