In other words, an animal gets through most work in the day if he carries 4/9 of the greatest load he could just stagger under; in which case he will be able to travel 1/3 of the distance he could walk if he carried no load at all. (Machinery requires no repose; and therefore d, the distance per day, is convertible into v, the velocity of movement.)
As an example:--Suppose a man is able to walk 10 miles a day, with a load of 130 lbs., and 33 miles a day when he carries nothing. Then, from equation (1), the value of b (the burden under which he would be brought to a standstill) would be about 267 1/2; and the best load for him, from equation (2), would be 119 lbs., which he would be able to carry, according to equation (3), 11 miles a day.
Horses.--The mode of taking wild horses is by throwing the lasso, whilst pursuing them at full speed, and dropping a noose over their necks, by which their speed is soon checked, and they are choked down.
Mr. Rarey's sixpenny book tells all that can be told on the subject of horse-breaking; but far more lies in the skill and horse-knowledge of the operator, than in the mere theory. His way of mastering a vicious horse is by taking up one fore-foot, bending the knee, slipping a loop over the knee until it comes to the pastern-joint, and then fixing it tight. The loop must be caused to embrace the part between the hoof and the pastern-joint firmly, by the help of a strap of some kind, lest it should slip. The horse is now on three legs, and he feels conquered. If he gets very mad, wait leisurely till he becomes quiet, then caress him, and let the leg down and allow him to rest; then repeat the process. If the horse kicks in harness, drive him slowly on three legs.
In breaking-in a stubborn beast, it is convenient to physic him until he is sick and out of spirits, or to starve him into submission.
Salt keeps horses from straying, if they are accustomed to come up to the camp and get it. But it is a bad plan as they are apt to hang about, instead of going off to feed. They are so fond of salt, that they have been known to stray back to a distant house where they had been allowed to lick it.
Shooting Horse.--Spur him as much as you will, but never use a whip; else, whenever you raise your gun to fire, he will feel a dread that it may be the whip, and will be unsteady.
Horse neighing.--Mungo Park tells how he clutched his horse's muzzle with both hands to prevent his neighing, when he was in concealment and horsemen were passing near.
Addenda.--In climbing a steep hill hang on to the tail of your horse as you walk behind him. Horses are easily driven in file by securing the halter of each horse to the tail of the one before him. To swim horses across a river, to sleep by their side when there is danger, to tether them, and to water them from wells, are all described elsewhere. (See "Horses" in index.)
Mules.--Mules require men who know their habits; they are powerful beats, and can only be mastered with skill and address. A savage will not assist in packing them, for he fears their heels: the Swiss say mules have always an arriere-pensee. They have odd secret ways, strange fancies, and lurking vice. When they stray, they go immense distances; and it is almost beyond the power of a man on foot to tend them in a wild country: he can neither overtake them easily, nor, when overtaken, catch them. The female is, in most breeds, much the more docile. They suffer from African distemper, but in a less degree than horses. The following descriptions of mule caravans are exceedingly graphic and instructive:--"The madrina (or godmother) is a most important personage. She is an old steady mare, with a little bell round her neck, and wheresoever she goes the mules, like good children, follow her. If several large troops are turned into one field to graze in the morning, the muleteer has only to lead the madrinas a little apart and tinkle their bells, and, although there may be 200 or 300 mules together, each immediately knows its own bell, and separates itself from the rest. The affection of these animals for their madrina saves infinite trouble. It is nearly impossible to lose an old mule: for, if detained several hours by force, she will, by the power of smell, like a dog, track out her companions, or rather the madrina; for, according to the muleteer, she is the chief object of affection. The feeling, however, is not of an individual nature; for I believe I am right in saying that any animal with a bell will serve as a madrina." (Charles Darwin.)