Identifier: monthlynauti118541855newy (find matches)
Title: Monthly nautical magazine, and quarterly review
Year: 1854 (1850s)
Authors:
Subjects: Shipbuilding
Publisher: New York : Griffiths, Bates
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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gravity,the golden force of nature, reigns supreme in the ocean wave,and makes his play-ground of the deep. But ocean has fearfulmoods. When atmospheric gales walk furiously abroad on thebeams of his balances, gravity, guarding with jealous hand theequilibrium of the jewelled sea, seizes its columns by the base,and hurls the avalanchan wave in oscillating fury over the vastfield of elemental war. Here it will be remembered, that seaas well as land sustains the gravitating force of an atmospherewhich, resting on the entire surface of the globe, presses down-wards equal to 14.7 pounds on every square inch of surface ;and it is to the velocity, unequal pressure, and friction of thewind, (which is air in motion,) by disturbing the equilibrium ofgravity, that we may refer the common exciting cause of wTaveoscillations in fluids. Motion thus excited may be considered asthe action and reaction of compound forces manifested in a pas-sive body, and demands a moments thought at the hands of the
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Water—Its Science, at Rest and in Motion. 39 builder, in designing the structures of marine art. For what isthe ship but the instrument of communication in transmittingmotion from the air, or any power, to the fluid on which sherests ? Sailing at sea is but a problem of distributing the in-crements of power on a line of speed, illimitable as it is track-less, on the rails of foam. But, keeping an eye on natures chart, it is a law of motionproduced in part by gravity, that the direction of a body for-ward is in a curve line downward, as shown in figure 3. Forcethus received at the surface of the fluid, is in the same mannercommunicated to the adjacent columns of the rising wave bythe laws of pressure. This action produces reaction in the mass,following the same law of gravity in transmitting the motionfrom column to column that would be observed in the case of aparticle skipping with the same velocity of motion beneath thesurface, only it does not move, but transfers its motion in os

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