. The literary digest. cribe many revo-lutions in a consequence of thisrotatory movement,producing the partic-ular force known inmechanics as centri-fugal force, the actionof gravitation is as itwere annihilated, andthe sprouting seed,removed from its in-fluence, is subjectedto centrifugal forceonly. See what oc-curs: The smallstems which, in or-dinary circumstances,would be directed up-ward, that is to say,in a direction oppositeto the action of gravi-tation, now turnthemselves in the di-rection opposite to thedirection of the cen-trifugal force, or toward the center of the wheel. T
. The literary digest. cribe many revo-lutions in a consequence of thisrotatory movement,producing the partic-ular force known inmechanics as centri-fugal force, the actionof gravitation is as itwere annihilated, andthe sprouting seed,removed from its in-fluence, is subjectedto centrifugal forceonly. See what oc-curs: The smallstems which, in or-dinary circumstances,would be directed up-ward, that is to say,in a direction oppositeto the action of gravi-tation, now turnthemselves in the di-rection opposite to thedirection of the cen-trifugal force, or toward the center of the wheel. The rootlets,which, under ordinary circumstances, would bury themselves inthe earth, and in the direction required by the laws of gravita-tion, in reality now point in the direction of the force which hastaken the place of gravitation. This curious experiment, carried out for the first time by J. , of England, has been repeated and modified in Franceby the ingenious naturalist Dutrochet. He replaced the vertical. KNIGHTS WHEEL EXPERIMENT ON CEKMINA-TING PLANTS. Tol. XVI., No. 6] THE LITERARY DIGEST. 165 wheel by a horizontal one. The force of gravitation acts con-stantly on the same points of the germinating seed; but as thisseed is exposed at the same time to the action of centrifugal force,produced by the movement of the wheel, the roots follow an in-termediate direction between a vertical one, which would be de-termined by the force of gravitation and a horizontal, one, result-
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1890
