A System of Mechanical Philosophy, Bindi 4J. Murray, 1822 - 50 síður |
From inside the book
Niðurstöður 1 - 5 af 54
Síða 98
... pipe exceed the pressure of the air in the upper ball on the other orifice by a force equal to the weight of the mercury , that is , to the aggregate of the action of gra- vity on each particle of mercury in the pipe . Therefore the ...
... pipe exceed the pressure of the air in the upper ball on the other orifice by a force equal to the weight of the mercury , that is , to the aggregate of the action of gra- vity on each particle of mercury in the pipe . Therefore the ...
Síða 133
... pipe ( arising from friction , or even from material obstacles in the pipe ) causes the water to press on the sides of the pipe . There- fore if a wire connect the other coating with the ground , we should expect that fluid will be ...
... pipe ( arising from friction , or even from material obstacles in the pipe ) causes the water to press on the sides of the pipe . There- fore if a wire connect the other coating with the ground , we should expect that fluid will be ...
Síða 158
... pipe hurries along with it the surround- ing air and flame from a considerable surface on all sides . It is in this manner that it gathers the whole of a large flame into one mass , and , at last into a very point . If the smoke of a ...
... pipe hurries along with it the surround- ing air and flame from a considerable surface on all sides . It is in this manner that it gathers the whole of a large flame into one mass , and , at last into a very point . If the smoke of a ...
Síða 246
... pipe and the wires , which are converted into the shining æthiops , should be placed in the magnetic direc- tion . 2. If a bar of steel be long hammered while lying in the magnetic direction , it acquires a sensible magnetism ( See Dr ...
... pipe and the wires , which are converted into the shining æthiops , should be placed in the magnetic direc- tion . 2. If a bar of steel be long hammered while lying in the magnetic direction , it acquires a sensible magnetism ( See Dr ...
Síða 323
... pipe lying obliquely . If indeed the magnetic fluid could escape from the iron without any obstruction by the propulsion of the magnet , it could produce no attraction , or sensible motion , any more than light does in a transparent ...
... pipe lying obliquely . If indeed the magnetic fluid could escape from the iron without any obstruction by the propulsion of the magnet , it could produce no attraction , or sensible motion , any more than light does in a transparent ...
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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.