Potassium

(noun.) a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite.

卡斯特罗校对

• A clean plate of glass is coated with collodion sensitized with iodides of potassium, etc. Edward W. Byrn. 十九世纪发明进展.
• Muriate of ammonium 5 parts}| n t | Nitrate of potassium 5 parts}| y u | | r | Snow or pounded ice 12 parts}| e | Muriate of sodium 5 parts}| to -25° | . 威廉K.戴维. 智者、化学家和伟大医生的秘密.
• In the following year Davy reported other chemical changes produced by electricity; he had succeeded in decomposing the fixed alkalis and disc overing the elements potassium and sodium. 李贝. 西洋科学史.
• When dry, dip the paper into a solution of iodide of potassium, containing 500 grains dissolved in 1 pint of water, and let it remain in the solution two or three minutes. 弗雷德里克·科利尔·贝克维尔. 伟大的事实.
• Metallic silver takes the place of potassium, forming insoluble iodide of silver on the film. Edward W. Byrn. 十九世纪发明进展.
• But the amount of potash thus obtained is far too limited to supply the needs of agriculture; and to-day the main sources of potash are the vast deposits of potassium salts found in Prussia. 伯莎M.克拉克. 科学通论.
• By the cyanide process, in which cyanide of potassium is used as a solvent for the gold, low-grade ores can be profitably worked. 佚名. 神奇的知识之书.
• If a piece of potassium permanganate about the size of a grain of sand is put into a quart of water, the solid disappears and the water becomes a deep rich red. 伯莎M.克拉克. 科学通论.
• The trough battery was used by Sir Humphry Davy in his series of great experiments--1806-1808--in which he isolated the metallic bases, calcium, sodium, potassium, etc. 威廉·亨利·杜利特. 世纪发明.
• I had given the boy considerable iodide of potassium to prevent salivation, but it did no good in this case. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• All metallic sodium and potassium are now obtained by electrolysis of fused hydroxides or chlorides (Pats. Edward W. Byrn. 十九世纪发明进展.
• Solutions of potassium iodide were frequently used for this purpose, giving a sharp, blue record, but fading away too rapidly. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• It was discovered in 1836 by Edmond Davy, who produced carburet of potassium, and evolved acetylene gas therefrom by decomposing it with water. Edward W. Byrn. 十九世纪发明进展.
• Preparing oxygen from potassium chlorate and manganese dioxide. 伯莎M.克拉克. 科学通论.
• The menstruum best adapted for electro-plating is a solution of silver in cyanide of potassium. 弗雷德里克·科利尔·贝克维尔. 伟大的事实.

整理:洛蒂