About the Book
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1822 edition. Excerpt: ...lines), in the manner described in the drawing, No. II., fig. 1. When the lamp is to be lighted, the burner is drawn down into the position represented by the sketch made in the dotted lines; and a second notch, E, in the spring, E, then falls into the hole in the plate b, and retains it in that situation. Upon pressing E towards the tube, B, it is again disengaged, and the burner may be then moved upwards or downwards, as required. Fig. 2, in the same drawing, represents the metal chimney, H: G is the plate which supports the reservoir for oil, and is itself supported by means of the two hooks, K, K, which, proceeding underneath the plate, G, rise again on each side the metal chimney, until they terminate in two hooks above K, K, which fit into two notches, made for them in the upper part of the metal chimney, H; by which means the said plate, G, may be removed, when a circularreflector is to be employed; and may be reinstated, in order to receive the reservoir, D. At h is shewn one of the slits which receive the fork, i; and at I, I, are two hooks, which pass through holes made in the wingreflectors to receive them, and on which the reflectors rest at their extremities, which are nearest to the metal chimney. In fig. 8, D is the reservoir of oil, with its stop-cock, its descending tube, C, and its valve at c; and the spring E, with its two notches.at e, e. In fig. 4, A represents the burner of the, lamp, with its two wicks and an air-pipe: a is the conical screwed joint, by which it is attached to the tube, B, which has a projecting piece b, having a hole in it, through which the spring, E, fig. 1 and 3, passes; and a plate perforated with holes at d, to lift the plug of the valve, c, fig. 1 and 3, and a semicylindrical pipe5-/j closed at the...
