Dialogues in Chemistry, Intended for the Instruction and Entertainment of Young People: In which the First Principles of that Science are Fully Explained. To which are Added Questions and Other Exercises for the Examination of Pupils, Volume 2J. Johnson, 1807 |
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Common terms and phrases
acetic acetic acid acid combine acid obtained alcohol alkalies alloy amalgam ammonia antimony arsenic azote barytes bismuth boiling brittle burns called camphor carbonic acid charcoal Charles cobalt colour combine with oxygen combustible composed compound contain converted copper crystals decomposed denominated dissolved in water distilled distinguished earths easily ether evaporated exposed fermentation flame fluid fluoric formed fused gallic acid glass gold green heat hydrogen James lime liquid malleable means melted mercury metallic oxydes mineral waters mixed mixture muriate of soda muriatic acid nitrate nitrate of potass nitrate of silver nitre nitric acid nitrous oxyde of iron oxyde of lead oxygen oxygen gas perties phosphoric acid phosphorus plates powder precipitate principal proportions quantity readily resins retort soluble in water solution specific gravity stances suber sugar sulphuret sulphuric acid tained taste tellurium tion tube Tutor wine yellow zinc
Popular passages
Page 191 - Yes, in about three times its weight of water, at the temperature of 60°, and during the solution much caloric is absorbed.
Page 158 - To the solution, add one part of muriate of soda; and dilute with four parts of water. Characters written with this solution are illegible when cold; but when a gentle heat is applied, they assume a beautiful blue or green colour...
Page 119 - Because the alkali of the soap abstracts the gallic acid, and leaves only the oxyde of iron.
Page 64 - It has been asserted, that the largest dose of laudanum may be checked in its narcotic effects, if a proper quantity of citric acid be taken with it ; and that, in these circumstances, it excites cheerfulness, succeeded by refreshing sleep, instead of stupefaction.
Page 162 - A small quantity gives a green solution, whilst a greater quantity changes it to a beautiful rich purple. The last experiment may be varied by putting equal quantities of this substance into separate glasses, and pouring hot water in the one, and a portion of cold water in the other.
Page 90 - ... water to one of the salt, undergoes no change in the dark; but when exposed to the light of day, it gradually acquires colour, and passes through a succession of changes to black. The common sun-beams, passing through red...
Page 178 - ... the resulting compounds possessed neither the properties of acids nor of alkalies, but properties intermediate between the two. Chemists have lately restricted the term salt still more, by tacitly excluding acids and alkalies from the class of salts altogether. At present, then, it denotes only the compounds formed by the combination of acids with alkalies, earths, and metallic oxides, which are technically called bases.
Page 166 - Bergman suspected to be в metallic oxide, which has since been demonstrated to be the case. Hitherto this metal is only obtained in grains, the greatest heat has not been sufficient to melt it into a button; its specific gravity is 7.4. When exposed to heat, in an open vessel, it gradually combines with oxygen, and is converted into a white oxide, which is volatilized in small brilliant needle form crystals. This oxide laving the properties of an acid is called the molybdic acid.
Page 192 - By gently triturating 3 grains of this salt and one of sulphur in a mortar with a metallic pestle, a series of detonations will take place resembling the cracks of a whip.