A System of Mechanical Philosophy, Bindi 4J. Murray, 1822 - 50 síður |
From inside the book
Niðurstöður 1 - 5 af 65
Síða 214
... north and south ends of the mariner's needle , or of a loadstone or mag- net . Dr. Gilbert called them the POLES of the loadstone or magnet . He had found it convenient for the proposed train of his experiments to form his loadstones ...
... north and south ends of the mariner's needle , or of a loadstone or mag- net . Dr. Gilbert called them the POLES of the loadstone or magnet . He had found it convenient for the proposed train of his experiments to form his loadstones ...
Síða 215
... north poles fronting each other , the magnets will retire from each other ; and in doing so , they generally turn round their axes , till the north pole of one front the south pole of the other , and then they run to- gether . This is a ...
... north poles fronting each other , the magnets will retire from each other ; and in doing so , they generally turn round their axes , till the north pole of one front the south pole of the other , and then they run to- gether . This is a ...
Síða 216
... north pole of A repels the north pole of B , and attracts its south pole , while the south pole of A exerts the opposite forces on the same poles of B. The attraction which we observe is the excess of two unequal attractions above two ...
... north pole of A repels the north pole of B , and attracts its south pole , while the south pole of A exerts the opposite forces on the same poles of B. The attraction which we observe is the excess of two unequal attractions above two ...
Síða 220
... pole seemed to reside almost in the centre of the ball . This was our object in giving them this shape . It reduced ... south pole of the other , they attract each other with a force which diminishes as the distance increases ; and this ...
... pole seemed to reside almost in the centre of the ball . This was our object in giving them this shape . It reduced ... south pole of the other , they attract each other with a force which diminishes as the distance increases ; and this ...
Síða 221
... pole of a mag- net to be exerted at one point of it . This will give us four actions of A on B , accompanied by as ... S , N , s , n , in a straight line . In the straight line O q take O m , Op , On , O q , respectively equal to N s , N ...
... pole of a mag- net to be exerted at one point of it . This will give us four actions of A on B , accompanied by as ... S , N , s , n , in a straight line . In the straight line O q take O m , Op , On , O q , respectively equal to N s , N ...
Aðrar útgáfur - View all
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.