Wells's Natural Philosophy: For the Use of Schools, Academies, and Private Students : Introducing the Latest Results of Scientific Discovery and Research : Arranged with Special Reference to the Practical Application of Physical Science to the Arts and the Experience of Every-day Life : with Three Hundred and Seventy-five Engravings |
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action angle appear atmosphere attraction axle ball battery body boiling bulk called cause center of gravity Centrifugal Force clouds cold color column condensed conductor construction contained convex convex lens copper crystalline lens cubic cubic foot cylinder degree diminished direction distance earth effect elastic elec electric current electricity elevation equal exerted fall feet fluid force friction galvanic glass greater heat hygrometer inch inclined plane increase iron length lens lever Leyden jar liquid machine magnetic matter mercury metal miles mirror motion move needle object particles pass pendulum piston plate poles position pounds pressure principle produced pulley quantity radiation rays of light reflected refracted rendered represented in Fig retina rise screw side solid sound space specific gravity steam substance supposed surface temperature thermometer tion tricity tube vapor velocity vessel vibrations weight wheel wind wire zinc
Popular passages
Page 123 - All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.
Page 72 - Billiards? an( j reflected motion, which he has learned by long-continued experience, viz., that the angle of incidence is always equal to the angle of reflection, and that action and reaction are equal and contrary.
Page 272 - ... said to amount to 3° or 4° only ; while upon land the difference often amounts to 9° or 10°. In temperate regions, and particularly in latitudes extending from 25° to...
Page 254 - What is a highpressure en- engines, the appaS*110 ? ratus for condensing the steam alternately above or below the piston, is dispensed with, and the steam, after it has moved the piston from one end of the cylinder to the other, is allowed to escape, by the opening of a valve, directly into the air. To accomplish this, it is evident that the steam must have an elastic force greater than the pressure of the atmosphere, or it could not expand and drive out the waste steam on the other side of the piston,...
Page 316 - The quotient found by dividing the sine of the angle of incidence by the sine of the angle of refraction, is called the index of refraction.
Page 257 - In common low-pressure boilers, it requires about eight feet of surface of the boiler to be exposed to the action of the fire and flame, to boil off...
Page 45 - This result gives the weight of a bulk of water equal to that of the specimen, and by dividing the weight of the specimen in air by this number, the specific gravity is obtained.
Page 119 - Whatever rude structure the climate and materials of any country have obliged its early inhabitants to adopt for their temporary shelter, the same structure, with all its prominent features, has been afterwards kept up by their refined, and opulent posterity. Thus, the Egyptian style of building...
Page 215 - Dogs and other animals when much heated, as they cannot throw off or diminish their natural covering, increase the evaporating surface by protruding a long, humid tongue. The power in animals of preserving their peculiar temperature has its limits. Intense cold coming suddenly upon a man who has not sufficient protection, first causes a sensation of pain, and then brings on an almost irresistible sleepiness, which if indulged in proves fatal.
Page 14 - There are living creatures so minute, that a hundred millions of them may be comprehended in the space of a cubic inch. But these creatures, until they are lost to the sense of sight, aided by the most powerful instruments, are seen to possess organs fitted for collecting their food, and even capturing their prey. They are, therefore supplied with organs, and these organs consist of tissues nourished by circulating fluids, which must consist of parts or atoms, if we please so to term them.