Harper's Outdoor Book for Boys. Joseph H. Adams
elbow, B (Fig. 10), in the ground. The cross-pipe leading out is eighteen or twenty inches long, and the short upright that comes to the surface outside the basin is fifteen inches long and is to be provided with a hose connection so that a garden hose may be attached to it. The stand-pipe in the basin and the cross-piece should be embedded in the cement concrete, and when it is dry and hardens around the pipes it will hold them securely in place. When the circle of bricks is complete, fill in the crevices with equal parts of cement and sand mixed into a mortar. This will lock the bricks together; then plaster the cement all around the inside of the circle and some at the outside so as to make a water-tight basin.
Earth is to be put back into the hole outside the circle of bricks and the sod replaced, so that grass will grow right up to the edge of the basin rim, which should project an inch or two above the surface of the ground.
From a plumber or gas-fitter obtain some old pieces of brass tubing an inch in diameter, cut one of them fourteen inches long, and slip it down over the stand-pipe. The lowest and largest plate rests on this. Next cut a piece of tubing nine inches long and slip it over the pipe. The second plate rests on this and the top plate is supported by a piece of the tubing cut six inches in length and slipped over the pipe. If porcelain dishes are used, make the first hole in them as follows:
Obtain a stout, three-inch steel wire nail, a block of wood about three inches square, having an inch hole bored at one end, and a small hard-wood mallet. Place a plate on the block of wood, inverted so that its centre will be exactly over the hole. Place the point of the nail on the plate, taking care to get it in the centre; then give it a sharp, quick blow with the mallet. If this is properly done a small piece of the porcelain will be driven out, but remember that if the blow is not properly centred it will break the plate. For this reason it is best to practise first on a broken plate; or if the porcelain seems to be impossible, the painted tin or enamelled plates will have to answer. A perforated porcelain plate is shown in Fig. 11 A. The ragged hole can be smoothed out or chafed away with an old rat-tail or half-round file. A brass reducer and a gas pillar should be screwed fast to the top of the stand-pipe so that a jet of water about a quarter of an inch in diameter will shoot above the pipe.
If a little wooden ball is to dance at the top of the jet, a half-circular basket will be necessary to catch the ball when it falls, so that the stream of water can pick it up again. This is made from brass or galvanized wire, and where the wires cross bind the joint with fine copper wire and solder the joints so as to make them rigid. A small brass ferrule or short piece of pipe should be soldered to the bottom of this basket, so as to hold it in place when slipped over the pillar or nozzle. This basket and its shape is more clearly shown in Fig. 11 B. It should be six or eight inches in diameter and three inches deep, with the wires close enough together to prevent the ball from falling through.
If it is not possible to get the bricks of which to form the basin, a concrete wall can be made instead. Dig the hole as before described; then construct a cylinder of wood twenty-four inches in diameter and eight inches thick. Floor over the bottom of the hole with concrete, after the stand-pipe is in place, and around the edge of the concrete floor and outside the cylinder embed some small stones so that the filling will hold fast. This is shown at c c in Fig. 12. Slip the wooden cylinder over the stand-pipe so that it will occupy the position as shown in Fig. 12. Make a mixture of coarse sand or gravel and cement, half and half, and add a shovel or two of small stones, preferably cracked, such as are used for the under-dressing to macadam roads. Tamp this down in the opening in the ground so as to fill up the ditch or moat as shown at Fig. 13. The outside of the cylinder should be thoroughly coated with lard or some heavy grease before the concrete is poured in, so that the wood will not absorb the moisture from the concrete and cause it to bind in the hole. As a precaution it would be well to make the bottom of the cylinder an inch smaller in diameter than the top, so that it may draw out easily after the concrete has set. The two slots shown in the top of the cylinder are hand holes to grasp it by.
With nearly clear cement, having but a small portion of sand added, finish the inside of the basin and the rim with a trowel so as to give it a smooth and even surface. The force of water may be regulated with a faucet.
An Aquarium
There is nothing difficult in the construction of a glass-and-wood aquarium like the one shown in Fig. 14, and the boy who is handy with tools and careful in joining wood-work accurately will be able to knock it together in short order. The best size will be twenty-four inches long, fifteen wide, and ten inches high. This will be generous enough in proportions to accommodate a dozen or so of small fish, some baby eels, crawfish, a turtle or two, and some water-lizards.
From a carpenter obtain a piece of white-wood twenty-seven inches long, seventeen inches wide, and one and a half inches in thickness. This must be of selected stock, hard and free from knots or sappy places. Cut four battens of hard-wood two inches wide, an inch thick, and fifteen inches long, and with brass screws attach them securely to the underside of the board to prevent its warping from the action of the water. Obtain a stick one inch and a half square and four feet long; cut this into lengths of eleven inches each and also prepare one eight feet long, two inches wide, and seven-eighths of an inch thick. With a groove-plane having a quarter-inch blade cut into the square stick on two sides as shown in Fig. 15 A. The edge of the stick between the two grooves may then be planed off so that an end view of the stick will appear as shown at Fig. 15 B. A groove should be cut at one side of the long stick three-eighths of an inch from one edge so that when turned groove side down an end will appear as shown at C in Fig. 15. This stick is to be cut in lengths fifteen and twenty-four inches respectively for top rails.
In the four corners of the white-wood board cut a hole with bit and chisel three-quarters of an inch square as shown at Fig. 16. Saw the bottom of each square stick so as to cut away about a quarter of an inch of wood on each side as shown at the lower part of A in Fig. 15. This is made so that the uprights will fit snugly into the holes and the shoulder formed by the saw-cuts will rest on the top of the base board.
With straight rule and pencil mark parallel lines connecting each hole as shown at D D in Fig. 16. These lines should correspond in position with the grooves cut in the posts; then remove the posts and with grooving-plane or chisel and mallet cut the grooves about three-eighths of an inch in depth. The glass sides fit into these grooves, and the top rails made from the long stick cap the upper edges of the glass sides. The ends should be lapped and screwed down to the top of the corner-posts to bind the glass and wood-work in one compact framework.
Before any of the wood-work is put together give it three successive thin coats of black asphaltum varnish, which can be purchased at a paint or hardware store. Each hole and the plug ends of the corner-posts are to be coated with thick asphaltum varnish, and when wet with the varnish the posts are to be driven into the holes. Screws passed in through the sides of the base board will hold them securely in place.
From a glazier or hardware store purchase two panes of double-thick glass ten by fourteen inches, and two measuring ten by twenty-two inches. Give the grooves a thick coat of the asphaltum varnish, slide the glass down into the grooves, and screw the top rails in place. When the glass is in place and before the top rails are put on, the glass should stand a quarter of an inch above the top of the corner-posts. When the rails are laid in place the top edge of the glass should be caught by the groove in the rails, otherwise the glass, having no support at the top, would bow out on account of the pressure of water, and either cause the glass to break or the joints to leak. Press the glass sides against the outer edges of the grooves and lightly insert some wooden wedges into the grooves to hold the glass in place temporarily for a day or two or until the varnish sets. Then fill the open spaces in the grooves with a putty made from whiting and asphaltum varnish. This you will have to make yourself with a putty-knife on a plate of glass, marble, or slate, for you cannot purchase it. Common putty is not hard enough and will not dry for months, while the special putty will set quickly and dry hard in a few days. When all the