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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
e gaps, leaving the plants in hills. These are thinned out by hand. Chop′ping-knife. A knife designed for chopping meat, vegetables, fruit, etc., upon a board, block, or in a bowl. Used on a domestic scale for cutting meat for mince, hash, sausage, etc. See Sausagemachine. Chorl. The angle at the junction of the blade of a penknife with the square shank which forms the joint. Cho-rob′a-te. The Greek level. See level. Cho′ro-graph. An instrument contrived by Professor Wallace, of Edinburgh. To determine the position of a station, having given the three angles made by it to three other stations in the same plane whose positions are known. The problem occurs frequently in maritime surveying, and is otherwise stated: — To construct two similar triangles on two given straight lines. Chro-mat′ic Printing. The precursor of colorprinting was the illuminated missal with its initial letters and borders, hand-painted in colors, and the playing-cards
Knight's Mechanical Encyclopedia (ed. Knight), E. (search)
cial hatching of eggs. It has been practiced from time immemorial in Egypt. See incubator; Calorifere. Egg-mold′ing; egg and tongue. （Architecture.) A peculiar molding in which a tongue de- pendent from the corona alternates with an oval boss whose major diameter is vertical, like an egg set on end. Egg-detector. Egg-tongs. Eidograph Egg-tongs. A grasping implement for seizing and holding an egg. Ei′do-graph. An instrument for copying drawing, invented by Professor Wallace. It consists of a central beam of mahogany, sliding backward and forward in a socket whose axis passes through a longitudinal slit in the beam. Two equal wheels, one below each end of the beam, turn on axes that pass through pipes fixed at a b, near its extremities, and a steel chain passes over the wheels as a band by which motion may be communicated from one to the other. Two arms f f slide in sockets along the lower face of the wheels, just under their centers, one of which bea<
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
the position and evolutions of the Austrians. It was fired at by the Austrians, but allowed to ascend out of range. A captive balloon was again made use of by the French at Solferino, 1859. A third use of balloons in this species of service was with the Army of the Potomac in the Peninsular campaign, and perhaps in other fields of action. The search for the lamented Sir John Franklin gave rise to many ingenious schemes for signaling the party and giving them notice of succor. Mr. Wallace's plan was to make a survey with the assistance of a captive balloon, affording a means of distributing notices which might reach the party. The plan understood to have been adopted was that of Mr. Shepherd. Balloons were inflated and set free, having printed packets of paper or oil-silk, which were distributed occasionally as the balloon traversed across the country. The papers contained directions, stating the latitude and longitude of the exploring ships, the direction in which th
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
sed on board the praus of the Malayan Archipelago. It is a bucket half filled with water, in which floats the half of a wellscraped cocoa-nut shell. In the bottom of this is a small hole, so that a small jet rises in the shell, which is gradually filled thereby, and so nicely is the size of the hole graduated to the capacity of the shell, that it sinks exactly at the end of an hour. The man on watch then cries out the number of hours from sunrise, and sets the shell afloat again empty. — Wallace's Malayan Archipelago. Water-clock. Wa′ter-clos′et. A commode with watersupply to empty the basin and carry off the contents. The water-closet, in its essential features, was invented by Bramah. These features may be described as a pan, a discharging valve, and a water-cock which comes into action as the discharge-valve is opened. The water-closet of the palace of the Caesars was adorned with marble arabesques and mosaics. At the back is a cistern with faucets for the diffe<