Philosophical Magazine

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Taylor & Francis., 1808
 

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22. oldal - The potash began to fuse at both its points of electrization. There was a violent effervescence at the upper surface; at the lower, or negative surface, there was no liberation of elastic fluid; but small globules having a high metallic lustre, and being precisely similar in visible characters to quicksilver, appeared, some of 19 which burnt with explosion and bright flame, as soon as they were formed, and others remained, and were merely tarnished, and finally covered by a white film which formed...
22. oldal - The phenomenon was independent of the presence of air ; I found that it took place when the alkali was in the vacuum of an exhausted receiver. The substance was likewise produced from potash fused by means of a lamp, in glass tubes confined by mercury, and furnished with hermetically inserted platina wires, by which the electrical action was transmitted. But this operation could not be carried on for any considerable...
22. oldal - ... characters to quicksilver, appeared, some of which burnt with explosion and bright flame, as soon as they were formed, and others remained, and were merely tarnished, and finally covered by a white film which formed on their surfaces. These globules, numerous experiments soon showed to be the substance I was in search of, and a peculiar inflammable principle the basis of potash.
30. oldal - ... gas, are formed. In nitrous acid, nitrous gas is disengaged, and nitrate of potash formed. The basis of potash readily combines with the simple inflammable solids, and with the metals ; with phosphorus and sulphur, it forms compounds similar to the metallic phosphurets and sulphurets.
140. oldal - Should the bases of potash and soda be called metals? The greater number of philosophical persons to whom this question has been put, have answered in the affirmative. They agree with metals in opacity, lustre, malleability, conducting powers as to heat and electricity, and in their qualities of chemical combination.
28. oldal - And the same body is often formed in the analytical experiments when the action of the electricity is intense, and the potash much heated. The basis of potash when introduced into oxymuriatic acid gas burns spontaneously with a bright red light; and a white salt proving to be muriate of potash is formed. When a globule is heated in hydrogen at a degree below its point of vaporization, it se.ems to dissolve in it, for the globule diminishes in volume, and the gas explodes with alkaline fumes and bright...
244. oldal - Ammoniacal gas, equal to one and a half or one and three-fifths of the volume of the amalgam is found to be produced, and a quantity of oxygen equal to one-seventh, or one-eighth of the ammonia disappears.* When thrown into muriatic acid gas, it instantly becomes coated with muriate of ammonia, and a small quantity of hydrogen is disengaged. In sulphuric acid it becomes coated with sulphate of ammonia and sulphur. I attempted by a variety of modes to preserve this amalgam.
80. oldal - In 1803 the author was gradually led to those primary laws which seem to obtain in regard to heat and to chemical combinations, and which it is the object of the present work to exhibit and elucidate.
286. oldal - I had observed the same law to prevail in various other instances of super-acid and sub-acid salts, I thought it not unlikely that this law might obtain generally in such compounds, and it was my design to have pursued the subject, with the hope of discovering the cause to which so regular a relation might be ascribed.
151. oldal - ... measure) of cold spring water, and afterwards strain it. It would be equally practicable painting with wax alone, dissolved in gum-water in the following manner. Take twelve ounces or three quarters of a pint wine measure of cold spring water, and four ounces and a half of gum-arabic, put them into a glazed earthen vessel, and when the gum is dissolved, add eight ounces of white wax. Put the earthen vessel with the gum-water and wax upon a slow fire, and stir them till the...

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