THE NAUSISMOGRAPH.

Thames Guardian and Mining Record, Volume I, Issue 37, 18 November 1871, Page 3

THE NAUSISMOGRAPH.

This is an invention by Mr Ferdinand Esposito Faraone, of the Italian navy. It is an automatic log-book, which, ivith unerring accuracy records the ivay made by the ship in her most unperceived deviations, the degree of her speed, and the amount of rolling and pitching. The apparatus shoivs the position of the compass (and consequently the direction in which the ship sails) at every tenth turn of the screiv or propelling iviieel. According to the position of a line traced in pencil on a strip of paper the speed of the ship, her stoppages, and the backivard movements, may be exactly observed. The color of the line changes automatically for the backivard motion. On a third strip of paper the extent of the rolling and pitch ing is delineated by black and blue lines in the form of a boiv more or less bent, according to the state of the sea. The compass belonging to the apparatus is composed of a magnetised bar, ivliich carries ivith it in oscillations a small steel stem placed beneath it and magnetised in like manner. The combination of these tivo magnets form an astatic system, but the preponderance of the magnetised bar above makes it always turn to the north. The steel stem below ends in a small pointed stylus to penetrate the paper, and mark the position of the compass. To obtain this result the strip of paper travels under the tivo needles, and at every tenth revolution of the screiv or the paddle-wheel, a small piece of mechanism lifts the strip, so that the paper itself comes to meet the puncture of the stylus and receive the impression of the index. The apparatus recording the speed of the vessel consists in a regulator, w hich rises or falls according to the rapidity of the rotation. Tlio regulator is so managed that ivlien the engine is ivorking at high pressure the pencil which folloivs the regulator makes its mark on a certain line of the paper; for slackened speed the line marked will deviate according to the regulator, and change its position in accordance ivith the motion of the vessel during the time of experiment. As to the pitching and rolling, they are anatomically recorded by the play .of poises which oscillate rcurfid two axes, perpendicular the one to the other. One of these axes is parallel to the length of the ship, the counterpoises which oscillato round tin’s axis measure the rolling, the other the pitching of the vessel. The nausismograph is, however, equally applicable to sailing vessels. The apparatus is the same in principle and the indications are given in the same manner. The motive power, which is, in one case, the engine of the ship itself, is in the other simple clock work. —British Trade Journal