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Knight's Mechanical Encyclopedia (ed. Knight) 3 1 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
sing through it and suffering refraction at its surface, shall converge to a single point, the true focus. See achromatic lens. A-pol-lon′i-con. A large chamber-organ played by key-boards or by barrels, and exhibited in London some years since. It was constructed by Flight and Robinson in 1817. It had 1,900 pipes, 45 stops, 5 key-boards and 2 barrels. The number of keys acted upon by the cylinders was 250. Apo-me-com′e-ter. An instrument for measuring hights, invented by a Mr. R. Millar, and manufactured in London. The apomecometer is constructed in accordance with the principles which govern the sextant, viz.: As the angles of incidence and reflection are always equal, the rays of an object being thrown on the plane of one mirror are from that reflected to the plane of another mirror, thereby making both extremes of the vertical hight coincide exactly at the same point on the horizon glass, so that by measuring the base-line we obtain a result equal to the altitude
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
2.CoreySeptember3, 1872. 136,018.BaldwinFebruary18, 1873. 137,466.MooreApril1, 1873. 138,241.GallyApril29, 1873. 138,922.OringMay13, 1873. 140,278.KastenbeinJune24, 1873. 140,279.KastenbeinJune24, 1873. 142,652.RaySeptember9, 1873. 149,647.FosterApril14, 1874. 150,234.FarnhamApril28, 1874. 152,869.ReynoldsJuly7, 1874. 152,868.ReynoldsJuly7, 1874. 157,694.PaigeDecember15, 1874. 164,037.RichardsJune1, 1875. 166,549.PattysonAugust10, 1875. 167,726.AllenSeptember14, 1875. 168,044.MillarSeptember21, 1875. 168,591.ThompsonOctober11, 1875. 169,215.WestcottOctober26, 1875. 169,216.WestcottOctober26, 1875. 170,372.HookerNovember23, 1875. 170,593.RichardsNovember30, 1875. Type-set′ting Tel′e-graph. One in which the message at the receiving end is set up in type. The title is also held to mean, but does not correctly define, the instrument in which certain letters are made to deliver an impression in consecution, and so spell out the message. See printing-telegraph.