Course of Lectures in Natural PhilosophyP. Byrne, 1802 - 404 Seiten |
Häufige Begriffe und Wortgruppen
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Beliebte Passagen
Seite 196 - He first established the truth that a body plunged in a fluid loses as much of its weight as is equal to the weight of an equal volume of the fluid it displaces.
Seite iv - By this way of analysis we may proceed from compounds to ingredients ; and from motions to the forces producing them ; and, in general, from effects to their causes ; and from particular causes to more general ones, till the argument end in the most general.
Seite xii - Have not the small particles of bodies certain powers, virtues, or forces by which they act at a distance, not only upon the rays of light for reflecting, refracting, and inflecting them, but also upon one another for producing a great part of the phenomena of nature?
Seite 112 - PF, parallel to the inclined plane ; in order to a balance, the fuftaining power muft be to the weight as the height of the plane to the length...
Seite 94 - ... the spirals : and therefore a power at the handle, whose intensity is equal to no more than a .single pound, will balance 152 pounds...
Seite iii - And although the arguing from experiments and observations by Induction be no demonstration of general conclusions, yet it is the best way of arguing which the nature of things admits of, and may be looked upon as so much the stronger by how much the Induction is more general.
Seite v - ... and gravity, are found in all bodies which fall under our cognizance or inspection, we may justly conclude they • belong to all bodies whatsoever, and are therefore...
Seite 218 - ... all the surface of the quicksilver is pressed upon by the air, except that portion which lies above the orifice of the tube : consequently, it must rise in the tube, and...
Seite 21 - ... the feveral portions of time. So that the velocity of a body falling by the force of gravity will conftantly increafe in the fame proportion with the time of the defcent. Or in other words, the motion of a body carried down by the force of gravity will be uniformly accelerated : and the veL ic T.
Seite 279 - ... of the ray is made the contrary way. Now that the fine of the angle of incidence is to the fine of the angle of refraction in a given ratio, .whatever be the inclination of the incident ray, may be proved experimentally in the following manner. Let a brafs quadrant graduated on both fides, and ?'• 8- fixed at its center to a perpendicular pillar in the Fig.