. Brethren's Almanac (1876). the neighborhood, and^rhaps tell us something new about the Mosaicones. Curious Scientific Pacts 1 A slight blow is sufficient to smash a whole pane * glass, while a bullet from a gun will only make a round hole in it; because in the latter case lie particles of glass that receive the blow are torn jYay from the remainder with such rapidity, that |ie motion imparted to them has no time to spread .irther. A door standing open, which would read- y yield on its hinges to a gentle push, is not oved by a cannon ball passing through it. The ill, in passing through
. Brethren's Almanac (1876). the neighborhood, and^rhaps tell us something new about the Mosaicones. Curious Scientific Pacts 1 A slight blow is sufficient to smash a whole pane * glass, while a bullet from a gun will only make a round hole in it; because in the latter case lie particles of glass that receive the blow are torn jYay from the remainder with such rapidity, that |ie motion imparted to them has no time to spread .irther. A door standing open, which would read- y yield on its hinges to a gentle push, is not oved by a cannon ball passing through it. The ill, in passing through, overcomes the whole force P cohesion among the atoms of wood, but its force I* its for so short a time, owing to its rapid passage, lat it is not sufficient to affect the inertia of the oor to an extent to produce motion. The cohe- on of the part of the wood cut by the ball would ave borne a very great weight laid quietly upon ; but suppose the ball fly at the rate of twelve undred feet in a second, and the door to be one. inch thick, the cohesion being allowed to act foronly the minute fraction of a second, its influenceu not perceived. It is an effect of this same principle that the iron head of a hammer may be driven down on its wooden handle by striking the op-posite end of the handle against any hard substancewith force an i speed. By ^his very simple opera-tion the motion i^ propagated so suddenly throughthe wood of the handle, that it is over before itcan reach the iron head, which, therefore, by itsown weight, oinks lower on the handle at everyblow, which drives the handle up. — I* ? iw Dress in the Sunday School Teacher. Surely among religious people this subject shouldengage more serious attention than it generallydoes, and especially as it affects the influence of theSunday-school teacher. What, we may ask, will bethe natural effect of a gaily-dressed teacher uponthe minds of the little group whom she has gath-ered round her ? She may diligently and orthodoxlyexp
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherhunti, bookyear1876
