A System of Mechanical Philosophy, Bindi 4J. Murray, 1822 - 50 síður |
From inside the book
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Síða 289
... sail , although they may be tole- rably exact for an observation of the dip in any port ; and we presume that it was such observations only that Norman confided in . Our readers will readily conceive the difficulty of poising a needle ...
... sail , although they may be tole- rably exact for an observation of the dip in any port ; and we presume that it was such observations only that Norman confided in . Our readers will readily conceive the difficulty of poising a needle ...
Síða 613
... sails or hull , is the same as if that por- tion were detached from the rest , and were exposed , single and alone , to the wind or water in the same ngle , But we a square have shown , in the article RESISTANCE of Fluids , 3 SEAMANSHIP ...
... sails or hull , is the same as if that por- tion were detached from the rest , and were exposed , single and alone , to the wind or water in the same ngle , But we a square have shown , in the article RESISTANCE of Fluids , 3 SEAMANSHIP ...
Síða 614
... sails , theory is not very erroneous ; but in these cases , the circumstances of the ship's situation are generally such that the practice is easy , occurring almost without thought ; and in this case , too , even considerable ...
... sails , theory is not very erroneous ; but in these cases , the circumstances of the ship's situation are generally such that the practice is easy , occurring almost without thought ; and in this case , too , even considerable ...
Síða 615
... sails will produce the movement we wish to perform . The ex- perienced seaman learns by habit the general effects of every disposition of the sails ; and though his knowledge is far from being accurate , it seldom leads him into any ...
... sails will produce the movement we wish to perform . The ex- perienced seaman learns by habit the general effects of every disposition of the sails ; and though his knowledge is far from being accurate , it seldom leads him into any ...
Síða 616
... sail , showing how they are produced and modified by the action of the wind on her sails , the water on her rudder and on her bows . We shall not attempt a precise determination of any of these movements ; but we shall say enough to ...
... sail , showing how they are produced and modified by the action of the wind on her sails , the water on her rudder and on her bows . We shall not attempt a precise determination of any of these movements ; but we shall say enough to ...
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Common terms and phrases
action angle arch axis balance ball beats body canal centre coating conductor constipated cord curve cylinder Daniel Bernoulli degree density diameter diminished dipping needle direction distance effect elec electric fluid electrified electrometer electrophorus equal experiments explain farther force give glass globe greater harmony harpsichord headsails impulse inches increase length limma loadstone magnet major third manner mean tones motion moveable musical natural natural density nearly needle north pole observed octave overcharged pallet particle pendulum perfect perpendicular phenomena piece of iron pipe plate polarity position precisely produced proportion pulses quantity ratio reader redundant fluid redundant matter repel round sails scapement sensible shew ship side sound south pole stratum string suppose surface temperament tetrachords theory tion tooth touch tricity trumpet tune undercharged undulations velocity vibrations wheel whole wind wire
Vinsælir kaflar
Síða 353 - COMPASS, or the declination of the magnetic or mariner's needle from the meridian or true north and south line at the undermentioned places in the United Kingdom, estimated for the year 1875.
Síða 209 - Elsewhere, Prof. Robison remarks : " It is not saying too much of this work to affirm that it contains almost everything we know of magnetism. His unwearied diligence in searching every writing on the subject and in getting information from navigators, and his incessant occupation in experiments, have left very few facts unknown to him. We meet with many things in the writings of posterior inquirers, some of them of high reputation and of the present day, which are published and received as notable...
Síða 545 - PC, the tooth B continues to press on the pallet D, and thus accelerates the pendulum, both during its descent along the arch PH, and its ascent along the arch HG. It is no less evident, that when the pallet D, by turning round the axis XY, raises its point above the plane of the wheel, the tooth B escapes from it, and i drops on the pallet c, which is now nearly perpendicular. i presses c; to the right, and accelerates the motion of the pendulum along the arch GP.
Síða 411 - We are sorry to see this ; because we have great expectations from the future labours of this gentjeman in the field of harmonics, and his late work is rich in refined and valuable matter. We presume humbly to recommend to him attention to his own admonitions to a very young and ingenious gentleman, who, he thinks, proceeded too far in animadverting on the writings of Newton, Barrow, and other eminent mathematicians.
Síða 609 - Yet a ship is a machine. We know the forces which act on it, and we know the results of its construction — all these are as fixed as the laws of motion. What hinders this to be reduced to a set of practical maxims, as well founded and as logically deduced as the working of a steam-engine or a cotton-mill?
Síða 676 - ... all shivering: For these sails, continuing to draw with considerable force, and balancing each other tolerably fore and aft, keep up the ship's velocity very much, and thus maintain the power of the rudder. If we now let all fly when the...
Síða 613 - ... is precisely such as is stated in the theory. The principles of the art are therefore to be found in these treatises ; but false inferences have been drawn, by computing from erroneous quantities.
Síða 657 - When this position is attained, note carefully the form of the rope, that is, the angle which its two parts make with the horizon. Call this angle a. Every...
Síða 656 - We shall not be far mistaken in the deflection of each contiguous filament, as it quits the bottom and glides along the rudder ; but we neither know the velocity of these filaments, nor the deflection and velocity of the filaments gliding without them.
Síða 665 - ... forward by removing a part of the bows out of the water. It has not always this effect ; for the form of the harping aloft is frequently such that the tendency to gripe is diminished by immersing more of the bow in the •water.