Nature, Volume 46 (Google eBook)

Front Cover
Sir Norman Lockyer
Macmillan Journals Limited, 1892 - Science
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Page 215 - FRS, President, in the chair. -The Secretary read a report on the additions that had been made to the Society's Menagerie during the month of...
Page 143 - On the motion of Dr. D. II. Scott, seconded by Mr. Howard Saunders, a unanimous vote of thanks was accorded to the President for his able address with a request that he would allow it to be printed. The Society's gold medal was then formally awarded to Prof.
Page 70 - The blue clay shows various kinds of metamorphism, and forms the pistachio-breccia containing topazes, and the mica-schist, micaslate, and talcose blue clay of the mass of Zabbara containing emeralds. The author discusses certain theoretical questions, and considers that the erosion of the valleys does not indicate the existence of a greater rainfall than the present one. He concludes by giving an account of the emerald mines. The reading of this paper was followed by a discussion, in which Prof....
Page 293 - Euclid's, and show by construction that its truth was known to us ; to demonstrate, for example, that the angles at the base of an isosceles triangle are equal, and that if the equal sides be produced the angles on the other side of the base...
Page 21 - Hence, when the times of A being in the space between H and K are included in the average, the average of the sum of the potential and kinetic energies of A is equal to the average kinetic energy of C. But the potential energy of A at every point in the space HK is positive, because, according to our supposition, the velocity of A is diminished during every time of its motion from H towards K, and increased to the same value again during motion from K to H. Hence, the average kinetic energy of A...
Page 172 - A CONTRIBUTION TO THE' STUDY OF THE BLOOD AND BLOOD-PRESSURE ; founded on Portions of the Croonian Lectures delivered before the Royal College of Physicians, London, 1896, with Considerable Extensions. With Illustrations, demy 8vo, 7s.
Page 260 - The combination of circumstances that caused the sudden arrest of imagemaking, and resulted in the abandonment of all such work on the island, never to be again revived, may have had its effect upon the art of writing. The tablets that have been found in the best stage of preservation would correspond very nearly with the age of the unfinished images in the workshops. The ability to read the characters may have continued until 1864, when the Peruvian slavers captured a large number of the inhabitants,...
Page 278 - ... the trader looked like a bull in a china shop. Even British officials and there were none more sympathetic to commerce and cognizant of its importance as means and end felt a certain impatience with the lesser vision of the money makers. Listen to the tone of a letter from Harry Johnston, "Commissioner and Consul-General for the territories under British influence to the north of the Zambezi," to the British South Africa Company: M There is nothing for it.
Page 212 - Leyden jar, which I have gladly adopted. The apparatus to be described affords, in conjunction with a suitable electrometer, a convenient means of quickly measuring small electrostatic capacities, such as those of short lengths of cable. The instrument is formed by two mutually insulated metallic pieces, which we shall call A and B, constituting the two systems of an air condenser, or, as we shall now call it, an air leyden. The systems are composed of parallel plates, each set bound together by...
Page 31 - Maxwell, and it cannot be doubted that he would have at once recommended that everything possible should be done to atone for the original failure of appreciation. " It is difficult to put oneself in imagination into the position of the reader of 1845, and one can understand that the substance of the memoir should have appeared speculative, and that its mathematical style should have failed to attract. But it is startling to find a referee expressing the opinion that ' the paper is nothing but nonsense,...

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