The student's chemical pocket companion / by W. S. Jacobs, M.D.

  • Jacobs, William Stephen, 1770-1843.
Date:
1807
Catalogue details

Licence: Public Domain Mark

Credit: The student's chemical pocket companion / by W. S. Jacobs, M.D. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    [ 17] Water, when raised in the atmosphere? constitutes clouds, fogs, mists, rain, &c. by simple refrigeration. Ice is the natural state of water; the conversion of water into ice, is attended with a disengagement of heat. Water, in a solid state, occupies more space than in a liquid form. Water is generally presented to us by nature in a fluid state; river, or rain water is never found pure, but contains salts, acids, &c. these are rendered pure by distillation. If water be passed through an ignited iron tube, it will be decomposed, the oxygen unites to the iron, and the hydrogen escapes ; the metal will be found to have encreased in weight, which if added to the hydrogen will be equal to the weight of the water employed. This experiment is one of the pillars of the new doctrine. ALKALIES. Alkalies have an acrid urinous taste, turn blue vegetable colours, green, (indigo and litmus excepted) effervesce with some