A System of Mechanical Philosophy, Bindi 4J. Murray, 1822 - 50 síður |
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Síða 13
... precisely equal and opposite to the external force which keeps it in any state of unequal distribution . But it may resemble the resistance to the descent of a parcel of small shot disseminated among a quantity of grain , or the resist ...
... precisely equal and opposite to the external force which keeps it in any state of unequal distribution . But it may resemble the resistance to the descent of a parcel of small shot disseminated among a quantity of grain , or the resist ...
Síða 18
... precisely balance each other , and there is nothing to disturb the phenomena of planetary gravitation ; and when bodies are not in their natural electrical state , it is a fact that their gravitation is disturbed . Although we cannot ...
... precisely balance each other , and there is nothing to disturb the phenomena of planetary gravitation ; and when bodies are not in their natural electrical state , it is a fact that their gravitation is disturbed . Although we cannot ...
Síða 28
... precisely in the same manner that the attractions did . It is hardly necessary to observe , that all these consequences will result equally from bringing an apparatus similar to that represented in fig . 3. near to ano- ther of the same ...
... precisely in the same manner that the attractions did . It is hardly necessary to observe , that all these consequences will result equally from bringing an apparatus similar to that represented in fig . 3. near to ano- ther of the same ...
Síða 36
... precisely similar . If we dip the end of a flat ruler into water , and if , after allowing the water to become perfectly still , we move the ruler gently along in a direction perpendicular to the face , we shall observe a single wave ...
... precisely similar . If we dip the end of a flat ruler into water , and if , after allowing the water to become perfectly still , we move the ruler gently along in a direction perpendicular to the face , we shall observe a single wave ...
Síða 53
... precisely like the curves formed by iron - fil- ings sprinkled on a paper held over a magnet . Each little rag of wax becomes electrical by position , acquires two poles , and the positive pole of one attracts the negative pole of an ...
... precisely like the curves formed by iron - fil- ings sprinkled on a paper held over a magnet . Each little rag of wax becomes electrical by position , acquires two poles , and the positive pole of one attracts the negative pole of an ...
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Common terms and phrases
action angle appear arch axis balance ball beats body canal centre coating concord 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 402 - When this was repeated 720 times in a second, the sound g in alt was most smoothly uttered, equal in sweetness to a clear female voice. When the frequency was reduced to 360, the sound was that of a clear, but rather a harsh man's voice. The cock was now altered in such a manner that it never shut the hole entirely, but left about one-third of it open. When this was repeated 720 times in a second, the sound was uncommonly smooth and sweet. When reduced to 360, the sound was more mellow than any man's...
Síða 315 - The magnetic fluid moves through, the pores of iron and soft steel with very little obstruction ; but its motion is more and more obstructed as the steel increases in hardness or temper, and it moves with the greatest difficulty in hard-tempered steel and the ores of iron.
Síða 613 - ... of the chief propositions, the reasonings remain in full force, and the modus operandi 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 409 - We are sorry to see this, because we have great expectations from the labours of this gentleman 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 678 - Thus a ship lying to is not like a mere log, but has a certain motion which keeps her under command. To get under weigh again, we...
Síða 674 - ... 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 644 - ... gives an impulse as great as the theory allows to an incidence of 40. We may therefore, on all occasions, keep the yards more square ; and the loss which, we sustain by the diminution of the very oblique impulse will be more than compensated by its more favourable direction with respect to the ship's keel. Let us take an example of this. Suppose the wind about two points before the In.am, making an angle of 68° with the keel. The theory assigns 43° for the inclination of the wind to the sail,...
Síða 628 - The telescope must always be pointed ahead of the real direction of the star, in the *-ame manner as the vane is always in a direction ahead of the wind ; and thus he ascertained the progressive motion of light, and discovered the proportion of its velocity to the velocity of the earth in its orbit, by observing the deviation which was necessarily given to the telescope.
Síða 663 - ... 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.