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 Experiences of Every-day Life. With Three Hundred and Seventy-five Engravings

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Ivison, Phinney & Company, 1863 - Physics - 452 pages
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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 220 - September, falling on a thickly pleached carpet of grasses, heaths, and willows, enshrine the flowery growths which nestle round them in a non-conducting air-chamber; and as each successive snow increases the thickness of the cover, we have, before the intense cold of winter sets in, a light cellular bed covered by drift, six, eight, or ten feet deep, in which the plant retains its vitality...
Page 414 - ... example, sulphate of copper. Two wires, one connected with the positive, and the other with the negative pole of a battery, Q, are extended along the top of the trough, and supported on rods of dry wood, B and D.
Page 102 - Any arrangement of machinery, therefore, which will enable us to render power more available, by applying it in the most advantageous direction, is as convenient and valuable as one which enables a small power to balance or overcome a great weight. Thus, if...
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 13 - a grain of musk has been kept freely exposed to the air of a room, of which the door and windows were constantly open, for a period of ten years ; during all which time the air, though constantly changed, was completely impregnated with the odour of musk ; and yet at the end of that time the particle was found not to have sensibly diminished in weight...
Page 169 - On removing the finger, he observed that the mercury in the tube fell, but did not fall altogether into the cistern; it only subsided until its surface was at a height of about 30 inches above the surface of the mercury in the cistern. The result was what Torricelli expected, and bo soon FlQ.
Page 100 - When a weight, or resistance, of comparatively great amount is to be raised by a very small power, by means of the simple wheel and axle, either of two inconveniences would ensue; either the diameter of the axle would become too small to support the weight, or the diameter of the wheel would become so great as to be unwieldy. This has been remedied by a very simple arFlG.

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