Handbook of technical gas-analysis : containing concise instructions for carrying out gas-analytical methods of proved utility / by Clemens Winkler ; translated, with a few additions, by George Lunge.

  • Winkler, Clemens (Clemens Alexander), 1838-1904.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: Handbook of technical gas-analysis : containing concise instructions for carrying out gas-analytical methods of proved utility / by Clemens Winkler ; translated, with a few additions, by George Lunge. Source: Wellcome Collection.

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    of sampling, and branching off a small secondary current from the former by means of a T-pipe, the latter current forming the average sample. The material of the aspirating-tube must be calculated to resist the prevailing temperature, and not to exert any chemical action upon the gas. Wherever it is possible glass tubes are employed for this purpose, because they are easily constructed, inserted, and cleaned, and because they are neither acted upon by, nor do they act upon, the gases. If the temperature admits of it, the glass tube is simply fixed by means of a perforated cork or caoutchouc stopper, for instance in sampling the gases of pyrites-burners or vitriol- chambers (fig. 2). In such cases it is usually sufficient simply to bore a hole in the lead; but if greater durability and tightness are desired, a small piece of lead-tubing may be soldered on to the hole. A simple hole is also sufficient for providing an opportunity for introducing a cork and glass tube into the masonry of a chimney or flue. But it is preferable, especially where many samples of gas have to be taken at various times, to cement, once for all, a por- celain socket-pipe into the hole made in the masonry by means of common clay or of fire-clay, and to tightly insert the cork with the glass tube into the socket. Porcelain aspirating-tubes are employed, if the temperature of
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