Transcription

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MISCELLANEOUS NOTES.

DESCRIPTION OF THE BOOMERING [BOOMERANG]

BY THE REV. L. E. THRELKELD

The aboriginal name of the instrument about to be described is Tur -rur- ma, Sir Thomas Mitchell the Surveyor General of the Colony, has very ingeniously adapted the form of the natives instrument to the propeller for a steam Vessel. The Boomering is seldom more than three feet from point to point in its crescent form. It has two curves, one like the moon it its first quarter, the other on the surface, just as the concave shell of an oyster would appear if cut into the shape of a half moon. It is this peculiar formation that causes the remarkable, circular motion, whilst revolving upon its own centre, returning the Boomering to the thrower, after it has made its circular flight through the air. But there is a secret in the art of throwing, not generally known, if it
be required to return to near the spot where the
thrower stands, namely; - he must face the wind and throw the instrument directly against it slantingly upwards through the air - The Boomering revolves rapidly upon its own axis, and thus forms a resisting power to the air, similar to the concave oyster shell when thrown by boys on the surface of the water to make what are termed by juvenile philosophers, ducks & drakes, and exactly, upon the same principle, the
air like the water, resists the Convex form which the instrument assumes in its rapid revolving rotary motion, and the wind blowing towards the thrower, the stronger the better returns the Boomering in its course to the point whence it was thrown.
As to any scientific Knowledge in the Aborigines
forefathers, respecting projectiles, or the theory of the Centripetal or Centrifugal forces in the formation of the Turrurma or Boomering the blacks had no more knowledge of such powers than our boys have when they make ducks & drakes with oyster shells on a pond of water. The instrument is only used in the manner described,
by way of amusement; when thrown for the purpose of destruction, whether at man or beast, it is sent forward so as to strike one of its parts upon the ground at same distance from the thrower, and the object intended to be hit, when the Boomering, rebounds, apparently with accelerated velocity and strikes with astonishing force the victim, inflicting a most serious wound with the sharp edge of the weapon at the flat points. A bombshell thrown amongst a company of soldiers cannot create a greater consternation than the flight of

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