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The Chemical News and Journal of Industrial Science; with which is ..., Volum 9
Visualització completa - 1864
The Chemical News and Journal of Industrial Science; with which is ..., Volum 10
Visualització completa - 1864
The Chemical News and Journal of Industrial Science; with which is ..., Volum 78
Visualització completa - 1898
action added alcohol alkaline ammonia amount analysis apparatus appears application beautiful becomes blue body boiling brown called carbonate cause cent CHEMICAL chloride colour communication complete compounds consists containing copper crystals determined diethylamine direction dissolved effect employed ether examined excess experiments fact formed give given glass grammes green heat hydrochloric hydrogen important Improvements iodine iron lead less light lime lines liquid London manufacture mass matter means metal method minutes mixed mixture nature nitrate nitric notice observed obtained ordinary organic oxide oxygen passed platinum portion potash potassium precipitate prepared present produced Professor properties proportion pure quantity rays reaction reflected remains remarkable salt separated silver Society soda sodium soluble solution spectrum substance sulphuric acid surface temperature tion treated tube vapours various weight whole yellow
Pàgina 184 - The strontia flame exhibits a great number of red rays well separated from each other by dark intervals, not to mention an orange and a very definite bright blue ray. The lithia exhibits one single red ray. Hence I hesitate not to say that optical analysis can distinguish the minutest portions of these two substances from each other with as much certainty, if not more, than any other known method.
Pàgina 137 - ... a wire connects with a similar cylinder and electrometer in a distant apartment; and his wife, by remarking the corresponding motions of the ball, writes down the words they indicate; from which it appears that he has formed an alphabet of motions. As the length of the wire makes no difference in the effect, a correspondence might be carried on at any distance; within and without a besieged town, for instance; or for a purpose much more worthy, and a thousand times more harmless, between two...
Pàgina 327 - Of Man's great Ignorance of the Uses of Natural Things ; or that there is no one thing in Nature whereof the uses to human life are yet thoroughly understood " — a saying which is still as true now as when it was written.
Pàgina 217 - It has the same effect when sprinkled on the foliage of fruit trees. A paste of one part of powdered chloride of lime and one-half part of some fatty matter, placed in a narrow band round the trunk of the tree, prevents insects from creeping up it It has even been noticed that rats and mice quit places in which a certain quantity of chloride of lime has been spread. This salt, dried and finely powdered, can, no doubt, be employed for the same purposes as flour of sulphur, and be spread by the same...
Pàgina 184 - For instance, the orange ray may be the effect of the strontia, since Mr. Herschel found in the flame of muriate of strontia a ray of that colour. If this opinion should be correct, and applicable to the other definite rays, a glance at the prismatic spectrum of a flame may show it to contain substances which it would otherwise require a laborious chemical analysis to detect.
Pàgina 137 - In electricity he has made a remarkable discovery: you write two or three words on a paper ; he takes it with him into a room, and turns a machine inclosed in a cylindrical case, at the top of which is an electrometer, a small fine pith ball ; a wire connects with a similar cylinder and electrometer in a distant apartment ; and his wife, by remarking the corresponding motions of the ball, writes down the words they...
Pàgina 172 - ... in each case; the appearances are so different, that, by this mode of examination, the metals may be readily distinguished from each other.
Pàgina 212 - Wormley, vision with the most powerful microscope is limited to objects of about al?$uoth of an inch, we need not be surprised if infusoria and other organisms appear in putrescible liquids in far greater numbers than the germs in atmospheric dust visible by the aid of the microscope would lead us to expect. — TR...
Pàgina 142 - ... wings. Viewed by transmitted light, the crystals are red, and in large mass almost opaque. The aqueous or alcoholic solutions of these salts possess the magnificent crimson colour so well known. The tri-acid salts, on the contrary, are of a yellowish brown, both in the solid state or in solution, and they are much more soluble in water and alcohol than the monoacid salts, which are comparatively but slightly soluble. The mono-hydrochlorate of rosaniline may be prepared either by combining the...