Natural Philosophy: For the Use of School, 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

Ivison, Blakeman, Taylor & Company, 1871 - 452 Seiten

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Seite 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.
Seite 72 - Billiards ? and 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.
Seite 434 - ... 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. The medal, or other article to be coated, is attached to the negative wire, and a plate of metallic copper to the positive wire.
Seite 292 - Dew is produced most copiously in tropical countries, because there is in such latitudes the greatest difference between the temperature of the day and that of the night. The development of vegetation is...
Seite 323 - The imagesformcd macommonlooking-glass ages formedjn are mainly produced by the reflection of the rays of light from the metallic surface attached to the back of the glass, and not from the glass itself. The effect may be explained as follows: — A portion of the light incident upon the anterior surface is regularly reflected, and another portion irregularly. The first produces a very faint image of an object placed before the glass, while the other renders the surface of the glass itself visible....
Seite 436 - A piece of zinc as large as a pea, or the point of a small iron nail, were found fully adequate to preserve forty or fifty square inches of copper ; and this, wherever it was placed, whether at the top, bottom, or in the middle of the sheet of copper, and whether the copper was straight or bent, or made into coils. And where the...
Seite 240 - No eider-down In the cradle of an infant is tucked in more kindly than the sleeping-dress of winter about the feeble flower-life of the Arctic regions.
Seite 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...
Seite 351 - When a great number of rays are reflected, the color will appear bright and intense. If the objects of the material world had been illuminated only with white light, all the particles of which possessed the same degree of refrangibility, and were equally acted upon by all substances, the general appearance of nature would have been dull, and all the combinations of external objects, and all the features of the human countenance would have exhibited no other variety than that which they posses in...
Seite 336 - 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.

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