Scientific amusements . wicker basket. In this there is also anillustf-ation of ceritrifugal force, as already mentioned. Facts of this nature may be multiplied bullet shot from a rifle will go through a pane of glassand leave a round hole in it; but if the ball be thrownby the hand, at a much less speed, the glass will beshivered into fragments. The flexible stem of a plant may be severed by aswitch horizontally thro-vt^n at it with great force. Thevelocity in this case is very high, and the moleculesdirectly struck attain also a speed so great that theyseparate themselves from
Scientific amusements . wicker basket. In this there is also anillustf-ation of ceritrifugal force, as already mentioned. Facts of this nature may be multiplied bullet shot from a rifle will go through a pane of glassand leave a round hole in it; but if the ball be thrownby the hand, at a much less speed, the glass will beshivered into fragments. The flexible stem of a plant may be severed by aswitch horizontally thro-vt^n at it with great force. Thevelocity in this case is very high, and the moleculesdirectly struck attain also a speed so great that theyseparate themselves from the surrounding molecules beforethey have ,had time to communicate their velocity to thelatter. PROPERTIES OF BODIES. TO PRPJECT ONE OR 2WO DRAUGHTSMEN FROM AHEAP OF THEM. This experiment is a variation of one which we hav^explained in another place. It is performed by means ofdraughts or backgammon men, but instead of a pieceof wbod, another disc is used as a projectile. Build up a column of ten or twelve pieces, as in. Fig. I3-—The Draughtsmen. the illustration, and with the thumb and forefinger propelthe single disc violently against the pile, causing the discto strike the column (Fig. 13). The piece thus launched out will strike tangentially the pile in one of two ways either it will hit it at the point of contact of two discs,-in which case two will be projected from the column-or it will strike a single disc, as shown in the illustration THE PRINCIPLE OF INERTIA. ig in which the black piece only will be projected from thepile, without disturbing the stability of the other pieces. THE CARD AND THE COIN. Place on the forefinger of your left hand, held upright,a card ; on the card place a halfcrown or other good-
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
