Development of the Australian Boomerang
We now turn to the Australians, a race which, being in the lowest stage of cultivation of any with whom we are acquainted, must be regarded as the best representatives of aboriginal man.
I have transferred the Australian sword, Plate XIV (diagram 3), fig. 61, to Plate XV (diagram 4), fig. 72, in order that from it we may be able to trace the development of a weapon supposed by some to be peculiar to this country, but one which in reality has had a very wide range in the earliest stages of culture; I allude to the boomerang.155
The Australians, in the manufacture of all their weapons, follow the natural grain of the wood, and this leads them into the adoption of every conceivable curve. The straight sword would by this means at once assume the form of the boomerang, which, it will be seen by the diagram, is constructed of every shade of curve from the straight line to the right angle, the curve invariably following the natural grain of the wood, that is to say, the bend of the piece of a stem or branch out of which the implement was fabricated.
All savage nations are in the habit of throwing their weapons at the enemy. The desire to strike an enemy at a distance, without exposing one’s self within the range of his weapons, is one deeply seated in human nature, and requires neither explanation nor comment. Even apes, as I have already noticed, are in the habit of throwing stones. The North American Indian throws his tomahawk; the Indians of the Grand Chako, in South America, throw the ‘macana’, a kind of club. We learn from the travels of Mr. Blount,156 in the Levant in 1634, that at that time the Turks used the mace to throw, as well as for striking. The Kaffirs throw the knob-kerry, as did also the Fidasians of Western Africa.157 The Fiji Islanders are in the habit of throwing a precisely similar club. The Franks are supposed to have thrown the ‘francisca’.158 The New Zealander throws his ‘pattoo-pattoo’, and the Australian throws the ‘dowak’ and the waddy, as well as his boomerang. All these weapons spin of their own accord when thrown from the hand. In practising with the boomerang, it will be found that it does not require that any special movement of rotation should be imparted to it, but if thrown with the point first it must inevitably rotate in its flight. The effect of this rotation, it will hardly be necessary to remind those acquainted with the laws of projectiles, is to preserve the axis and plane of rotation parallel to itself, upon the principle of the gyroscope. By this means the thin edge of the weapon would be constantly opposed to the atmosphere in front, whilst the flat sides, if thrown horizontally, would meet the air opposed to it by the action of gravitation; the effect, of course, would be to increase the range of the projectile, by facilitating its forward movement, and impeding its fall to the earth. This much, all curved weapons of the boomerang form possess as a common property.
If any large collection of boomerangs from Australia be examined, it will be seen that they vary not only in their curvature, but also in their section; some are much thicker than others, some are of the same breadth throughout, whilst others bulge in the centre; some are heavier than others, some have an additional curve so as to approach the form of an S, some have a slight twist laterally, some have an equal section on both sides, while others are nearly flat on one side and convex on the other.
As all these varieties continued to be employed, it would soon be perceived that peculiar advantages were derived from the use of the flatter class of weapon, especially such as are flat on the under side, for by throwing these in such a manner as to catch the air on the flat side, instead of falling to the ground they would rise in the air, precisely in the same manner that a kite, (fig. 71), when the boy runs forward with the string, rises and continues to rise as long as it is kept up by the action of the air beneath. In like manner the boomerang, as long as the forward movement imparted to it by the thrower continues, will continue to rise, and the plane of rotation, instead of continuing perfectly parallel to its original position, will be slightly raised by the action of the atmosphere on the forward side. When the movement of transition ceases, the boomerang will begin to fall, and its course in falling will be by the line of least resistance, which is in the direction of the edge that lies obliquely towards the thrower; it will therefore fall back in the same manner that a kite, when the string is suddenly broken, is seen to fall back for a short distance; but as the kite has received no movement of rotation to cause it to continue in the same plane of descent, it soon loses its parallelism, and falls in a series of fantastic curves towards the ground. The boomerang will do the same thing if it loses its movement of rotation; but as long as this continues, which it usually does after the forward movement has ceased, it continues to fall back upon the same inclined plane by which it ascended, and finally reaches the ground at the feet of the thrower. There are various ways of throwing the boomerang, but the principles here enunciated will explain the course of its flight in whatever manner it may be thrown.
Now it is evident that this peculiar mode of flight would be of great advantage to the savage, for as we learn from a paper in Trans. Ethnological Society (N.S. iii. pp. 264-5), by Mr. Oldfield, who speaks from experience, the natives usually employ this weapon against large flocks of ducks or wild-fowl in rivers or marshes; the weapon after striking or missing the prey would return to the thrower, instead of being lost in the morass; its use, therefore, would give to the individual or tribe possessing it a great advantage over their neighbours in the struggle for life.
But it is evident that the principles of the flight of the boomerang, such as I have described it, according to the recognized law of projectiles, must have been entirely unknown to the savage; he can no more be said to have invented the boomerang than he can be said to have invented the art of sustaining life by nourishment. Instinct prompts him to eat; little better than instinct would enable him to select from amongst his weapons such as are found most suitable for obtaining food; and we have already seen how he may have been led to the adoption of such an instrument as the boomerang, purely through the laws of accidental variation, guided by the natural grain of the material in which he worked.
The boomerang, though used chiefly for game, is used also as a weapon, and Mr. Oldfield says that it is capable of inflicting a wound several inches in depth.
A further movement is effected in the flight of the boomerang by giving the arms a slight lateral twist, by means of which it is caused to rise by virtue of its rotation, screwing itself up in the air precisely in the same manner that a boy’s flying top rises to the ceiling. By means of this addition, the weapon is sometimes made to strike an object in its fall to the ground, behind the thrower, but the twist is not by any means invariable, as any one may see by examining a collection of these weapons. Nor is it essential to ensure a return fall, which I have frequently ascertained by practising with a boomerang that was perfectly flat.
In examining Plate XV (diagram 4), it will be seen that the boomerang passes by imperceptible gradations from the straight sword, fig. 72, on the one hand, into the ‘malga’, a kind of pick, fig. 89, used for war purposes, on the other159, and this Australian malga closely resembles a weapon of the same kind from New Caledonia, figs. 90 and 91, which, as already mentioned, is used both as a weapon and for tilling the ground. In Plate XV (diagram 5), figs. 92 to 100, I have also arranged the links of connexion between the boomerang and a kind of hatchet or chopper called the waddy. A slight swell or projection is seen to grow out of one end of the concave side of the boomerang, and this develops into the form of a chopper. In those specimens of this class in which the projection is only slightly developed, as in figs. 94 and 95, the sides of the implement are flat, and the weapon is obviously designed for throwing, but in some of those in which the projection is more fully developed, as in fig. 96, the shaft is quite round, and the head becomes thick and heavy, so as to render it totally unsuited to the purposes of a missile. We see, therefore, in this diagram, the transition, by minute gradations, from a missile to a hand weapon, or vice versa. The boomerang, the sword, the malga, and the waddy, are thus seen to be allied in such a manner as to make it difficult to determine which of the four was the original weapon, and, if properly arranged to display their development, they should be distributed in branch lines, starting from a common centre, exactly in the same manner that I have suggested the various forms of spear and arrow-heads ought to be arranged in the natural order of progression. [See, for example, Plate III, and pp. 37-8, above.]