Ovations On Other Sites - Ovation 10 Ovations 06Cake Guess chose the topics covered by Ovations On Other Sites - Ovation 10 without reflecting upon the choices others have made. Talking with friendly strangers in the middle of a natural disaster and shaping new plans is another way to look at things in a different light. |
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In 1711, this engine was introduced into mines for pumping purposes. Whether its action was originally automatic or whether dependent upon the hand operation of the valves is a question of doubt. The story commonly believed is that a boy, Humphrey Potter, in 1713, whose duty it was to open and shut such valves of an engine he attended, by suitable cords and catches attached to the beam, caused the engine to automatically manipulate these valves. This device was simplified in 1718 by Henry Beighton, who suspended from the bottom, a rod called the plug-tree, which actuated the valve by tappets. By 1725, this engine was in common use in the collieries and was changed but little for a matter of sixty or seventy years. Compared with Savery's engine, from the aspect of a pumping engine, Newcomen's was a distinct advance, in that the pressure in the pumps was in no manner dependent upon the steam pressure. In common with Savery's engine, the losses from the alternate heating and cooling of the steam cylinder were enormous. Though obviously this engine might have been modified to serve many purposes, its use seems to have been limited almost entirely to the pumping of water. |
It is, at any rate, certain that after St. Chrysostom Christmas was observed on the 25th of December in East and West alike, except in the Armenian Church, which still remains faithful to January 6th. St. Chrysostom, who died in the beginning of the fifth century, informs us, in one of his Epistles, that Julius, on the solicitation of St. Cyril of Jerusalem, caused strict inquiries to be made on the subject, and thereafter, following what seemed to be the best authenticated tradition, settled authoritatively the 25th of December as the anniversary of Christ's birth, the _Festorum omnium metropolis_, as it is styled by Chrysostom. It may be observed, however, that some have represented this fixing of the day to have been accomplished by St. Telesphorus, who was Bishop of Rome A.D. 127-139, but the authority for the assertion is very doubtful. |
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