The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1849 |
Contents
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Common terms and phrases
æther allotropism Alps ammonia angle appears Astronomer Astronomer Royal aurora aurora borealis average axis bismuth blue calculated carbonate of soda cent centre chloride Cloudy colours contained crystal December diamagnetic diameter direction distance effect electric ellipsoid eocene equal equation equatoreal error experiments expression formula given grains Greenwich heat inches instrument iodide iron Lassell light lime liquid Lord Rosse magnesia magnetic matter Mean temperature metal millimetres motion needle nitre nitric acid nummulitic object observations Observatory obtained oxide phænomena phænomenon Phil plane polar pole portion position potash precipitate present pressure produced Professor Challis pyrophosphoric acid quantity quaternion rain rays remarkable respectively right ascension rotation salt silver soluble solution speculum star steam substance sulphate of soda sulphuret sulphuric acid supposed surface telescope tessarines theory tion vector velocity wave Whitehaven wire yellow
Popular passages
Page 373 - ... it was not many years since the famous city of London petitioned the parliament of England against two nuisances ; and these were, Newcastle coals, in regard to their stench, &c., and hops, in regard they would spoil the taste of drink, and endanger the people...
Page 75 - ... its diamagnetic relations being in no way affected. If the crystal be broken up, or if it be fused and re-solidified, and the metal then subjected to the action of the magnet, the diamagnetic phenomena remain, but the magne-crystallic results disappear, because of the confused and opposing crystalline condition of the various parts. If an ingot of bismuth be broken up and fragmentary plates selected which are crystallized uniformly throughout, these also point; the magne-crystallic axis being,...
Page 300 - By treating nitrate of silver with perfectly dry chlorine, M. Deville has succeeded in isolating anhydrous nitric acid, the existence of which was demonstrated by numerous analyses. This beautiful substance is obtained in colourless crystals, which are perfectly brilliant and limpid, and may be procured of considerable size ; when they are slowly deposited in a current of gas rendered very cold, their edges are a centimetre in length. These crystals are prisms of six faces, which appear to be derived...
Page 250 - Flintshire, £c. ; in the north, Derbyshire, Yorkshire and Cumberland, that is to say, the Brigantian territory ; and it is to this last district that the descriptions apply most correctly. Lead cast in Roman moulds, pigs, in fact, of the age of Hadrian and other emperors, have been found in Flintshire, Derbyshire, Yorkshire, and some other counties. But few ancient mining instruments have ever been found in the lead-bearing districts of...
Page 77 - To this part of the force he applies the word magnetocrystallic, in contradistinction to magne-crystallic, which is employed to express the condition or quality or power which belongs essentially to the crystal. The author then remarks upon the extraordinary character of the power, which he cannot refer to polarity, and gives expression to certain considerations and views which will be best learned from the paper itself. After this, he resumes the consideration of Plucker's results " upon the repulsion...
Page 216 - Letter from Dr. Forster, of Bruges. "I have long wished to call the attention of the Society to a very curious fact in the chronology of lunations, if I may so express myself; but I have always been deterred by an apprehension that it had so much the air of superstition about it, that it might, in many minds, rather excite ridicule than interest. Still, however, facts are not to be despised, and I have resolved to point out to you, that whenever the new moon has fallen on a Saturday, the following...
Page 228 - ... explosive than when subjected to atmospheric pressure in an open vessel. Nevertheless, when gunpowder is restrained until the temperature requisite for the appropriate reaction of its ingredients is attained, it exerts a force far exceeding that of the chamber confining it. In this respect it differs from steam, of which, when the temperature of the fire applied is sufficiently high, the explosive force is directly as the pressure before bursting, and this, of course, is commensurate with the...
Page 75 - The effect takes place when the crystal is surrounded by masses of bismuth, or when it is immersed in water or solution of sulphate of iron, and with as much force apparently as if nothing intervened. The position of the crystal in the magnetic field is affected by the approximation of extra magnets or of soft iron; but the author does not believe that this results from any attractive or repulsive force exerted on the bismuth, but only from the disturbance of the lines of force or resultants of magnetic...
Page 248 - JEneas — perhaps the metal was then of too vulgar use — employed too much by tinkers — to be fit for a heroic shield. Electrum is substituted, and iron is the staple article in the Vulcanian workshop, as brass was in that of "H<X>AI2TO2, 1000 years before.
Page 132 - Notwithstanding the interesting investigations of Dutrochet and other physiologists, there still prevails too much obscurity on this subject to hazard an opinion. But, in any case, the fact is singular, and appears to me to merit the attention of persons accustomed to engage in questions of this nature. Experiments of the same kind, made on the contractility of the sensitive plant with rectified...