Page:Willich, A. F. M. - The Domestic Encyclopædia (Vol. 3, 1802).djvu/478

452&#93; 452] P U M Scic7ices, of wliic'i the following Is an accurate description : Fig. 1. A, B, C, D, represents a pump, the form of which is simi- lar to that of the pumps commonly employed on ship-board. E, the spout. F, a stopper. D, d, a plank-cap, that is fitted to the pump, and provided with leather on its lower surface ; be- ing secured by the screws a, i : in the centre is a hole, through which the spear of the pump passes, and round which a leather collar is made, as represented at the tiie letter c. g, a nut for the screw !;. f, a square piece of wood, that is nailed across one end of the plank- cap, through both which the screw a is introduced : — a hole is made through such piece and the cap, that communicates with the bore of the pump. G, G, a wooden tube, which may be of any requisite length, and consist of any number of joints : it is made square at the lower extre- mity, and perforated for the recep- tion of the cock ; the upper end being made with a nice shoulder. e, a wooden cock, that opens or shuts the communication bet^A'een the pump and t!.e tube; being furnished on the oppo-^ite side wiih a handle and with a lock, in case it should be found nei essarv. //, h, are two ferules, the objeiSt of which is to prevent the tube from splitting;. H, IT, braces, each of v hi( h ought to be cros^ed over another, as nearly at right angles as possible.
 * ', i, are irons in the form of a

staple, which surround the tube, and pass through the braces ; their ends being jierforated with holes for fore-locks. PUM K, L, M, N, is a head, made of five pieces of wood ; — h, I, m, n, ci square piece, in the lower part of which is a hole for the reception of the extremity of the tube, and which piece rests on the shoulder 0, p ; — to the lower end of this head is nailed a piece of leather, with a hole in its centre, similar to that made in the wood. Another piece of leather of the same form is placed on the top of the tube, and between both is a circle of thin plale-lrass ; the two pieces of leather and the brass being pressed between the lower end of the head, and the shoulder of the tube. — Their edges are delineated at o, p. K, N, and L, M, are the edge"; of two pieces of plank, of a similar width with the head, to which they are closely nailed ; each being pro- vided with a tennon, that passe<{ through a mortice in the end of the piece O, P : both tenuous have holes for a forelock at (jr. O, P, a piece of plank, of the same width as the sides ; the centre of which is perforated, in order that the tube may pass through; and in each end of which is a mortice for the reception of the tennons. N, M, a cap. r, r, are two pieces nailed to the side of the tube; the lower extre- mity of each is provided with a truck, with a view to lessen the friction of the head in its horizontal revolution. (J, cj, represent forelocks, the de- sign of which is to fasten down the htad, and prevent the water from escaping at the joint o, p. Q, R, is a wooden condui^tor ; the extremity marked with the let- ter Q, being solid, while the oppo- site end, 11, is bored with a small auger. s, a bolt^ tint passes through