Natural Philosophy: With an Explanation of Scientific Terms, and an Index, Volume 2Baldwin and Cradock, 1832 |
Common terms and phrases
acid action aperture appear ascer attraction axis ball battery body brass centre centre of gravity circle colours compass concave conductor convex convex lens copper cylinder degree diameter direction distance earth effect elec electric current electric fluid electroscope employed equal experiments Fahrenheit focus force galvanic glass gravity greater heat horizontal hygrometer inch induction instrument intensity iron length lens lenses lever light magnet ment mercury metal motion move needle Newton north pole object object-glass obliquely observed opposite parallel particles passing perpendicular phenomena piece placed plane plate polarity portion position prism produced proportion pyrometer quantity rays rection reflected refraction refrangible rendered repulsion retina right angles ring round side south pole specific gravity spherical aberration steel substance surface telescope temperature theory thermometer thickness tion tricity tube velocity vertical voltaic weight wire zinc
Popular passages
Page 64 - And these things being rightly dispatched, does it not appear frOm phenomena, that there is a Being incorporeal, living, intelligent, omnipresent, who in infinite space, as it were, in his sensory, sees the things themselves intimately, and thoroughly perceives them, and comprehends them wholly by their immediate presence to himself...
Page xviii - ... called in geometry a parabola. But when the ball is thrown perpendicularly upwards, it will descend perpendicularly; because the force of projection, and that of gravity, are in the same line of direction. We have noticed the centres of magnitude and of motion; but I have not yet explained to you what is meant by the centre of gravity.
Page 44 - ... that the vibrations thus excited are propagated in the refracting or reflecting medium or substance, much after the manner that vibrations are propagated in the air for causing sound and move faster than the rays so as to overtake them...
Page xxxvii - Aries the Ram, Taurus the Bull, Gemini the Twins, Cancer the Crab, Leo the Lion, Virgo the Virgin, Libra the Balance, Scorpio the Scorpion, Sagittarius the Archer, Capricornus the Goat, Aquarius the Waterbearer, and Pisces the Fishes...
Page 1 - In the year 1774, the following question was proposed by the Electoral Academy of Bavaria as the subject of a prize dissertation:—' Is there a real and physical analogy between electric and magnetic forces ; and, if such analogy exist, in what manner do these forces act upon the animal body?
Page 44 - Those that are averse from assenting to any new discoveries but such as they can explain by a hypothesis, may for the present suppose that as stones by falling upon water put the water into an undulating motion, and all bodies by percussion excite vibrations in the air, so the rays of light, by impinging on any refracting or reflecting medium or substance...
Page 43 - Every ray of light in its passage through any refracting surface, is put into a certain transient constitution or state; which, in the progress of the ray, returns at equal intervals, and disposes the ray at every return to be easily transmitted through the next refracting surface ; and between the returns to be easily reflected by it.
Page li - ... gives place to darkness, while the moon's shadow is passing over us. When, on the contrary, the earth is between the sun and the moon, it is we who intercept...
Page xxvi - The velocity of the circumference of the wheel is as much greater than that of the axle, as it is further from the centre of motion : for the wheel describes a...
Page 44 - Sound, and move faster than the Rays so as to overtake them ; and that when any Ray is in that part of the vibration which conspires with its Motion, it easily breaks through a refracting Surface, but when it is in the contrary part of the vibration which impedes its Motion, it is easily reflected ; and...