. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . many experiments, choosing for that purpose thecase of strips of cast iron sliding upon bars of cast iron spreadwith lard, since this had been the subject of careful study inhis preceding experiments, and is the case which most fre-quently occurs in practice. Description of the Apparatus employed in the Experi-ments.—The apparatus which Morin employed differs fromthat described in p. 1570, only in the following dispositionnecessary for suspending to the sle
. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . many experiments, choosing for that purpose thecase of strips of cast iron sliding upon bars of cast iron spreadwith lard, since this had been the subject of careful study inhis preceding experiments, and is the case which most fre-quently occurs in practice. Description of the Apparatus employed in the Experi-ments.—The apparatus which Morin employed differs fromthat described in p. 1570, only in the following dispositionnecessary for suspending to the sled, at a desired height,the body designed to produce the shock, and allowed to fallat will during the motion. Upon the. sides of the box of the sled. Fig. 3048, areraised two frames of firm uprights a b and a 6, pierced withholes at intervals of 16 ft., through which pass two ironpins ; upon these pins rests a movable cross-piece c d oí raising and lowering the pins, the height of the cross-piece c d above the sled may be variedat will. A screw e and nut passes freely across a hole cut in the middle of the cross-piece, and. FEICTION. 1579 bears a plier with ring legs, upon which is suspended a shell to give the shock. The two legsof the pliers are bound with strips of wick with quick match, holding them shut. By means ofthe screw e the height of the shell above the surface shocked can be exactly regulated. We may easily conceive from this description, the box and uprights being firmly fastened tothe sled, that the whole system partakes of a common motion, and that if at any instant of itscourse the shell falls upon the sled, it falls there with a vertical velocity due to the height of thefall, and with a horizontal velocity which, as we shall see hereafter, was sensibly the same as thatof the sled. By means of the ligature of the legs of the pliers we accomplish the fall of the shell,without any external concussion or disturbance. For this purpose a man sets fire to th
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Keywords: ., bookcentury1800, bookdecade1870, bookidsp, booksubjectengineering
