QuŔ en diuen els usuaris - Escriviu una ressenya
No hem trobat cap ressenya als llocs habituals.
Altres edicions - Mostra-ho tot
according acetic action added alcohol alkaline ammonia amount analysis apparatus appears applied base becomes body boiling calcium carbonate cause cent CHEMICAL chemistry chloride coal colour combination complete composition compounds considerable consists containing converted copper corresponding crystallisation decomposition described determination direct dissolved distilled effect employed estimation ether examination experiments fact formation formed further given gives glass heat hydrochloric hydrogen Improvements Institution iron known Laboratory lead less light lime liquid manufacture March matter means metallic method mineral mixed mixture nature Notices observed obtained ordinary original oxide oxygen passed phosphate phosphoric portion practical precipitate prepared present produced proportion pure quantity reaction recorded relating remains salt sample separated silver Society soda sodium soluble solution substance sulphate sulphuric acid surface taken temperature tion treated tube volume washed yields zinc
PÓgina 12 - Others apart sat on a hill retired, In thoughts more elevate, and reasoned high Of Providence, Foreknowledge, Will, and Fate— Fixed fate, free will, foreknowledge absolute — And found no end, in wandering mazes lost.
PÓgina 232 - Stevenson, president, in the chair. The minutes of the previous meeting having been read and confirmed, Mr.
PÓgina 3 - Thy Father has written for thee." " Come, wander with me," she said, "Into regions yet untrod; And read what is still unread In the manuscripts of God." And he wandered away and away With Nature, the dear old nurse, Who sang to him night and day The rhymes of the universe. And whenever the way seemed long, Or his heart began to fail, She would sing a more wonderful song, Or tell a more marvellous tale.
PÓgina 170 - By a delicate mathematical analysis, Thomson arrives at the theorem that the ''average pressure at any point of an incompressible, frictionless fluid, originally at rest, but set in motion and kept in motion by solids, moving to and fro, or whirling round in any manner, through a finite space of it," would explain the attractions just described.
PÓgina 144 - London. /Chemical Technology, or Chemistry in its ^-^ Applications to the Arts and Manufactures. By THOMAS RICHARDSON and HENRY WATTS.
PÓgina 96 - Supplement; bringing the Record of Chemical Discovery down to the end of the year 1869 ; including also several Additions to, and Corrections of, former results which have appeared in 1870 and 1871.
PÓgina 253 - ... effect is proportional to the magnetic intensity of the bar multiplied by the current traversing the coil seems to indicate that in this case the effect is produced by the attraction of the magnetic particles by the coil. But then it will be asked why so remarkable an augmentation of the effect is produced by the increase of tension in the case of the soft iron bars. When we are able to answer this question in a satisfactory manner, we shall probably have a much more complete acquaintance with...
PÓgina 73 - Since it appeared that the purest and densest vapour alone gave the greatest number of lines, it became of interest to examine the spectra of compounds consisting of a metal combined with a nonmetallic element. Experiments with chlorides are recorded. It was found in all cases that the difference between the spectrum of the chloride and the spectrum of the metal was that under the same spark-conditions all the short lines were obliterated. Changing the spark-conditions, the final result was that...