An Elementary Course of Natural and Experimental Philosophy ...Hickling, Swan and Brown, 1856 - 528 Seiten |
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ammonia angle atmosphere attraction axis axle ball battery body boiler bottle brass meridian called candle carbonic acid centre of gravity cock condenser conductor connected copper cord cylinder direction distance earth eclipse ecliptic electrified electroscope engine equal equator experiment extremity feet flame fluid force glass globe heat hence horizon hydrochloric acid hydrogen inches insulated iron knob latitude lever light lime liquid longitude machine magnet mercury metal moon motion move needle nitric acid north pole oxygen passing piece pipe piston plane plate portion potassa pressure prime conductor produced rays refraction represented in Fig right ascension round screw sealing wax shown in Fig soil south pole spark specific gravity stars steam substances sulphuric acid surface suspended takes tin foil tion tricity tropic of Cancer tube turn valve velocity vertical vessel voltaic weight wheel wire zinc
Beliebte Passagen
Seite 402 - That very law* which moulds a tear, And bids it trickle from its source, That law preserves the earth a sphere, And guides the planets in their course.
Seite 80 - The specific gravity, or specific weight of a body, is its weight as compared with the weight of an equal bulk of some other substance^ assumed as the standard of comparison.
Seite 265 - I cannot answer better than by giving you an extract from the minutes I used to keep of the experiments I made, with memorandums of such as I purposed to make, the reasons for making them, and the observations that arose upon them, from which minutes my letters were afterwards drawn. By this extract you will see, that the thought was not so much "an out-of-the-way one," but that it might have occurred to any electrician.
Seite 326 - ... every muscle in his countenance was simultaneously thrown into fearful action ; rage, horror, despair, anguish, and ghastly smiles, united their hideous expression in the murderer's face, surpassing far the wildest representations of a Fuseli or a Kean. At this period several of the spectators were forced to leave the apartment from terror or sickness, and one gentleman fainted.
Seite 265 - Electrical fluid agrees with lightning in these particulars: 1. Giving light. 2. Color of the light. 3. Crooked direction. 4. Swift motion. 5. Being conducted by metals. 6. Crack or noise in exploding. 7. Subsisting in water or ice. 8. Rending bodies it passes through. 9. Destroying animals. 10. Melting metals. 11. Firing inflammable substances. 12. Sulphurous smell.
Seite 500 - Although the ash forms a very small part of plants, yet it seems to be as essential to their growth and existence as any of the elements composing the organic part. The proportion in which these substances are found varies in different plants, and even in different parts of the same plant. The following Tables, by Boussingault and Johnston, give the composition of the. organic as well as of the inorganic parts of some of our most valuable plants.
Seite 266 - Rending bodies it passes through. 9. Destroying animals. 10. Melting metals. 11. Firing inflammable substances. 12. Sulphureous smell. The electric fluid is attracted by points. We do not know whether this property is in lightning. But since they agree in all the particulars wherein we can already compare them, is it not probable they agree likewise in this ? Let the experiment be made.
Seite 479 - SO3, and the combining equivalent =16+ 3 x 8 = 40. The sign of equality (=) is used to express an identity of composition, but not always an identity in the form of the arrangement of the elements. The names given to compound substances are such as to indicate their elementary composition. Compounds containing oxygen are called acids or oxides, according as they do or do not possess acidity. Thus an oxide of iron contains oxygen and iron. The termination ic is placed to the name of a substance, when...
Seite 62 - We know now that the underlying principle is the same as in a mercurial barometer : it is the pressure of the atmosphere on the surface of the water in the well that pushes the water up into the pump.
Seite 156 - Thus the natural refraction of the lenses of the eyeball is permanently perverted ; the parallel rays of light are brought to a focus before they reach the...