An Elementary Course of Natural and Experimental Philosophy: For the Use of High Schools and Academies, in which the Principles of the Physical Sciences are Familiarly Explained and Illustrated by Numerous Experiments and Diagrams
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ammonia angle atmosphere attraction axis ball battery body bottle brass meridian called candle carbonic acid centre cock conductor copper cork cylinder direction distance earth ecliptic electrified electrophorus electroscope equal equator experiment extremity feet flame fluid force gases glass globe gutta percha heat horizon hydrochloric acid hydrogen inches insulated iron knob latitude light lime liquid longitude machine magnet mercury metal moon motion move needle negative nitric acid north pole oxide oxygen paper passing piece pipe piston plants plate portion positive electricity potassa pressure prime conductor produced rays refraction represented in Fig right ascension round screw sealing wax shown in Fig soil solution south pole spark specific gravity stars steam substances sulphuric acid surface suspended takes temperature tin foil tion tricity tube turn valve vapor velocity vertical vessel voltaic weight wheel wire zinc
Page 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.
Page 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.
Page 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.
Page 19 - ... it varies directly as the mass and inversely as the square of the distance.
Page 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...
Page 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.
Page 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.
Page 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.
Page 440 - Rectify the globe to the latitude of the place; bring the sun's place in the ecliptic to the meridian, and set the index to XII.