Air-analysis : a practical treatise on the examination of air with an appendix on illuminating gas / by J. Alfred Wanklyn and W.J. Cooper.
- James Alfred Wanklyn
- Date:
- 1891
Licence: Public Domain Mark
Credit: Air-analysis : a practical treatise on the examination of air with an appendix on illuminating gas / by J. Alfred Wanklyn and W.J. Cooper. Source: Wellcome Collection.
82/98 page 70
![stopper is a flask, 2j fluid ounces, with a neck ground so as to fit accurately into the neck of the gas-bottle. In order to use the gas-bottle, gas is filled in by displacement; that is to say, a tube (vide fig. 4) is led 2i ounces ^^P inside to the top of the bottle, and through the tube gas is allowed to flow until the bottle is full of gas. If the gas be issuing at the usual rate {i.e., five cubic feet per hour), a flow of two minutes will suffice to fill the bottle. The use of the flask-stopper will be obvious. It is charged with the reagent, and then inserted into the neck of the gas-bottle. Contact Fia. 4. between the reagent and the gas is ensured by giving the bottle twenty vigorous shakes. Measurement of Sidjpliuretted Hydrogen (HgS) in Coal-Gas.—For this purpose we re- quire, in addition to the gas-bottle with its flask-stopper, a burette gradu- ated into divisions of yV^h fluid ounce; also standard lead solution; also lead- paper. The burette requires a proper holder {vide fig. 5). The standard lead solution is made I ]i by dissolving 35.7 grains of crystallised Fia. 5. acetate of lead in one pint of distilled water. Each yVth ounce of the solution precipitates](https://iiif.wellcomecollection.org/image/b20411777_0082.jp2/full/800%2C/0/default.jpg)
