The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1849 |
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Common terms and phrases
action æther alcohol alizarine alkalies alumina ammonia amount analysis animal appears aqueous Astronomer Royal atoms baryta body boiling bromine carbonic acid carbonized mass cent chemical Chinese wax chloride chloroform Cloudy colour combination composition compound contained copper crystals decomposed decomposition distance distilled effect electric equation evaporation exist experiments extract formula gave gives glass heat helix hydrogen inches inorganic constituents iodine light liquid luminous magnesia magnetic matter Mean temperature melting-point mercury metallic methylamine micrometer mineral muriatic acid myricine nitric nitric acid nitrogen object-glass observed obtained oxide oxygen Peroxide of iron phænomena phænomenon Phil phosphate phosphorescence phosphoric acid planes plate portion position potash precipitate produced proportion rain rays remarkable residue salt Sandwick showers silica silver sin² small quantity soda soluble solution steam substance sulphate sulphuric acid surface tion tube Uckfield vapour wire yellow
Vinsælir kaflar
Síða 143 - ... the quantity of electricity is increased in a greater proportion than the surface over which (according to the laws of electric distribution) it is spread. Its tension therefore is increased, and may attain the point when it is capable of separating from the drop to seek the surface of the cloud, or of the newly-formed descending body of rain, which, under such circumstances, and with respect to electricity of such a tension, may be regarded as a conducting medium. Arrived at this surface, the...
Síða 357 - ... ascertain that the pure light of the sun performs in about two or three seconds the decomposition of the bromo-iodide of silver, which is manifested by the white precipitate; while the same intensity of light determines the affmity for mercurial vapour in the wonderfully short space of about y^^dth part of a second.
Síða 524 - ... their nature with which matter is endowed. Under such impressions he has devoted an unusual amount of time and attention to the determination of this class of numerical constants. As the results, too, were entirely novel, and wholly unprovided for in the received view of the gaseous constitution, of which indeed they prove the incompleteness, it was the more necessary to verify every fact with the greatest care.
Síða 202 - ... substance, produce the smell of aceton during ignition. The acetic acid was of course derived from the basic acetate of lead used in the preparation of xanthin, and the acid with which they were originally combined must have gone to the oxide of lead. Now, as I stated above, the oxide of lead was found to be combined with phosphoric acid ; hence it is probable that the greater part, if not all, of the fixed bases left after the ignition of the xanthin existed in the plant as phosphates. Xanthin...
Síða 44 - ... success ; but by taking some precautions, one becomes veritably invulnerable. The following is what has succeeded best with me : I rub my hands with soap, so as to give them a polished surface ; then, at the moment of making the experiment, I dip my hand into a cold solution of sal-ammoniac saturated with sulphurous acid, or simply into water containing some sal-ammoniac, and in default of that, into fresh water.
Síða 53 - But it seems probable, that, in mountainous districts, the amount of rain increases from the valley upwards, to an altitude of about 2,000 feet, where it reaches a maximum, and that above this elevation it rapidly decreases.
Síða 83 - ... some curious spots of quicksand, in the midst of the great desert of ElAkkaf, which are regarded with superstitious horror by the wandering Bedouins. A cord of sixty fathoms in length with a plummet at the end, which he cast into one of them, disappeared in the course of five minutes. His narrative is published in the fourteenth volume of the Journal of the Royal Geographical Society of London. In spite of the glowing descriptions of ancient authors, the idea hitherto entertained of this region...
Síða 134 - On the Variations of the Acidity of the Urine in the State of Health" — " On the Influence of Medicines on the Acidity of the Urine.
Síða 134 - Tartrate of potash in large doses produces the most marked effect on the alkalescence of the urine. 120 grains of pure dry tartrate of potash dissolved in four ounces of distilled water made the urine alkaline in thirty-five minutes. In two hours the alkalescence had disappeared, but after the next meal the effect of the tartrate of potash was again apparent.
Síða 135 - To eliminate the effects of magneto-electrical currents, the author then made similar experiments with non-magnetic metals and with silico-borate of lead, substituted for the iron keepers, but no thermic effects were developed. He then tried the magnetic metals nickel and cobalt, and obtained thermic effects with both, and in proportion to their magnetic intensity.