Chemical recreations: a series of amusing ... experiments ... To which are prefixed, first lines of chemistry, etc / [Anon].
- John Joseph Griffin
- Date:
- 1824
Licence: Public Domain Mark
Credit: Chemical recreations: a series of amusing ... experiments ... To which are prefixed, first lines of chemistry, etc / [Anon]. Source: Wellcome Collection.
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![the bottom of a long cylindrical jar, just as the tube a, g. 52, reaches to the bottom of that jar. Then, the car- onic acid gas, as it is evolved, forees the common air, yhich is lighter than itself, out of the jar, and occupies its Jace. We discover when the jar is filled with the gas, y holding to the top of it a piece of wetted litmus paper, he blue colour of which is changed by the gas to a red. It will be observed, perhaps, that carbonic acid gas, is ot incapable of being collected over water. ‘That is true: ut we only give directions for obtaining this gas without. he trough, by way of example. It will be seen, that this ode can only be efficient, when the gas to be collected is eavier than common air: another plan is to be adopted, hen the gas is lighter than common air.—See 468. 451, To procurr NitrocEeN Gas. Process ].—Intro- uce a lighted taper under a glass jar, which stands over water, and is filled with common air. The light will shortly be extinguished, a cloudiness will be perceived, which, however, soon subsides, and the water in the basin ises in the jar.—Aationale. The atmospheric air is de- composed; the oxygen is absorbed by the burning taper, and the nitrogen remains. The cloudiness proceeds froma he unconsumed smoke of the taper. ‘The water rises in the jar, because the included volume of 2ir, is, by the ab- sorption of its oxygen, diminished. 452. Process 2.—Mix equal weights of clean iron fil- ings and sulphur into a paste with water, and place the mixture over water, in a cup supported by the stand, fig. 48: then invert over it, a jar full of common air, and let it remain thus for a day or two, when the air will be di- minished in bulk one-fifth, and nitrogen gas will remain. The mixture having absorbed the oxygen of the air. 453. Process 3.—Wash a piece of lean beef well, and cut it into very small pieces; put these into a retort, and pour upon them nitric acid, diluted with a considerable quantity of water. Apply a gentle heat. Collect the gas over water. . . 454. To pROVE THAT NITROGEN GAS DOES NOT SUPPORT Comsustion.—The same as process 438. Only that the Ase](https://iiif.wellcomecollection.org/image/b22027634_0173.jp2/full/800%2C/0/default.jpg)
