Water and its teachings in chemistry, physics and physiography

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E. Stanford, 1882 - 216 Seiten
 

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Seite 135 - the wild stoneavalanches of the Alps, which smoke and thunder down the declivities with a vehemence almost sufficient to stun the observer. I have also seen snow-flakes descending so softly as not to hurt the fragile spangles of which they were composed; yet to produce from aqueous vapour a quantity which a child could carry of that tender material demands an exertion of energy competent to gather up the shattered blocks of the largest stone-avalanche I have ever seen, and pitch them to twice the...
Seite 163 - The density (or specific gravity) of a substance is the ratio between the weight of any volume of the substance and the weight of a like volume of some other substance taken as a standard.
Seite 193 - It is worth while to mark how this experiment illustrates the fact that, however intense a luminous beam may be, it remains invisible unless it has something to shine upon. Space, though traversed by the rays from all suns and all stars, is itself unseen. Not even the ether which fills space, and whose motions are the light of the universe, is itself visible.
Seite 177 - Archimedean theorem, that, when a solid body is immersed in a liquid it loses a portion of its weight, equal to the weight of the fluid which it displaces, or to the weight of its own bulk of the liquid.
Seite 157 - New York Journal of Commerce. " The aim of the work is to furnish a hand-book of a symmetrical science, resting fundamentally upon the law of Avogadro that 'equal volumes of all substances, when in the state of gas and under like conditions, contain the same number of molecules.
Seite 53 - Looking at the face of an electromagnet (such as the field spool of a motor), a pole will be north if the current is flowing around it in a direction opposite to the motion of the hands of a watch.

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