If a spoke be broken, cut a new one much thicker than the rest, half check it on to the back of the felloe, and let the other end abut upon the nave, filling up nearly the space between the sound spokes on either side; it should need to be driven in tightly, and, when in position, should be secured by thongs of raw hide, both at the nave and at the felloe, to sticks laid across the front of the spokes on either side, and securely lashed to them.
Lead is useful for a multitude of purposes; its great specific gravity, and the ease with which it can be melted, cut, hammered, moulded, and bent, render it especially valuable as a handy metal. Our space will not admit of our giving more than a few of the most noteworthy purposes to which it can be applied by the hunter and explorer. Projectiles of all sizes can be made from it, from the ponderous cannon shot to the small sizes used by the hunter naturalist.
Round shot for artillery, of excellent quality, can be manufactured from lead; and there is no doubt that for certain purposes it is far superior to the iron missiles in general use, the cheapness of the latter material being its great recommendation. It will sometimes happen in wild countries that although regular cannon balls are not obtainable lead is, and to make round shot from it two or three methods may be adopted. The first is to form a ball from well-mixed clay, or carve one from wood, of size to fit the bore of the piece easily, but not too loosely. The clay ball will require thorough drying in the sun or before a slow fire before use. The wooden one will merely require sprinkling over with fine ashes from the camp fire to fit it for use. Two large calabashes, wooden boxes, bowls, or cooking pots, are now to be rather more than filled with well-kneaded clay, which has been carefully freed from stones or grit, pressing it well down with a flat board until it is quite even at the surface and is perfectly compact. The clay round the edges of the two clay holders must now be trimmed off with a knife even with the sides of the holders, but projecting about an inch beyond the brim. The surface of each is now to be sprinkled with very fine ashes, and the ball pressed into the centre of the clay until it is half imbedded. It is then to be carefully removed, and pressed in like manner on the other holder. The ball is then taken out and laid aside, the two holders being allowed to dry slowly, care being taken that the clay is not cracked by the too sudden application of heat. When thoroughly dry, the vessels or holders are to be placed mouth to mouth, and so fitted, by scraping the clay, that the two indentations formed by the ball fit exactly facing each other; when this has been done, a funnel-shaped inlet must be cut for the admission of the molten lead. The two holders may now be put together, secured with a lashing of cord or strips of hide, and the metal run in at the inlet. Some time must be allowed to elapse before the mould is disturbed, or the lead will not have sufficiently settled to admit of the shot being removed without injury to the apparatus. The tail of lead formed by the inlet serves to lift the shot out by, and is then cut off flush with the surface. A number of balls may with care be made with the same pair of holders, only the greatest caution is needed in this, as with all other operations in which molten lead is used, to guard against the presence of moisture in the mould, or most serious accidents will happen.