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Adelard Albertus Magnus alpha particle alpha rays America ancient ant-hills appear Arabs atomic weight become beta particles cannibal causes cent chemical chemistry chief civilization comets democracy direction distance earth effect electrons elements Europe European existence experience experimental fact Fiji Fijians fish galaxy Greek helium human hydrogen important increase individual industrial Institute interest journal labor less Lick Observatory mammals matter Mbau medieval metals method middle ages Milky missionaries modern moral motions municipal university nation natives natural science nebulæ nucleus observed orbits Paracelsus period Peter of Spain Photographed physical planetary plants POPULAR SCIENCE MONTHLY possible practise problem Professor progress race radioactive radium result Roger Bacon scientific smoke social society solar system soot spirals stars stellar system stones structure tapa telescopes theory things thirteenth century tion to-day women
Page 105 - Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain the same number of molecules...
Page 112 - In the heavens we discover by their light, and by their light alone, stars so distant from each other that no material thing can ever have passed from one to another; and yet this light, which is to us, the sole evidence of the existence of these distant worlds, tells us also that each of _ them is built up of molecules of the same kinds as those which we find on earth.
Page 81 - The ancients who wished to illustrate illustrious virtue throughout the empire, first ordered well their own States. Wishing to order well their States, they first regulated their families. Wishing to regulate their families, they first cultivated their persons. Wishing to cultivate their persons, they first rectified their hearts.
Page 154 - To me it seems that neither the obtaining or retaining of any trade, how valuable soever, is an object for which men may justly spill each other's blood; that the true and sure means of extending and securing commerce is the goodness and cheapness of commodities; and that the profit of no trade can ever be equal to the expense of compelling it, and of holding it, by fleets and armies.
Page 151 - Against the credit for redeemed souls, I set the cost of armadas and the sacrifice of soldiers and friars sent to the Philippines. And this I count the chief loss : for mines give silver and forests give timber, but only Spain gives Spaniards, and she may give so many that she may be left desolate and constrained to bring up strangers
Page 112 - No theory of evolution can be formed to account for the similarity of molecules, for evolution necessarily implies continuous change, and the molecule is incapable of growth or decay, of generation or destruction.
Page 279 - Also flying machines can be constructed so that a man sits in the midst of the machine revolving some engine by which artificial wings are made to beat the air like a flying bird.
Page 112 - None of the processes of nature, since the time when nature began, have produced the slightest difference in the properties of any molecule...
Page 117 - ... to two successive a-particles entering the detecting vessel within a few seconds of each other. This was readily seen from the peculiarity of the motion of the spot of light on the scale. As the electrometer needle was moving slowly near the end of its swing caused by the effect of one a-particle, a second impulse due to the entrance of another was communicated to it, and caused it to move again more rapidly. Such double throws occur occasionally, and are readily recognised, provided the interval...
Page 148 - From these figures it may be stated with confidence that the average height of the men of France began notably to decrease with the coming of age, in 1813 and on, of the young men born in the years of the Revolutionary wars (1792-1802), and that it continued to decrease in the following years with the coming of age of the youths born during the Wars of the Empire.