The principles of bacteriology : a practical manual for students and physicians / by A.C. Abbott.

  • Abbott, A. C. (Alexander Creever), 1860-1935.
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: The principles of bacteriology : a practical manual for students and physicians / by A.C. Abbott. Source: Wellcome Collection.

    131/520 (page 127)
    and the thermo-regulator. This apparatus has for its object the maintenance of a constant pressure of the gas going to the thermo-regulator. There are several instruments of this form in use, but they do not accom- plish the object for which thev are designed. The instrument most commonly employed, the appa- ratus of Moitessier (Fig. 80), is based on somewhat the same principles as the large regulators seen at the manufactories of illuminating gas. Such apparatus act very well when employed on the large scale, as one sees them at the gas-works; but when applied to the limited and sudden fluctuations seen in the gas coming from an ordinary gas-cock, are practically useless. They are too gross in their construction, and act only under compara- tively great and gradual fluctuations in pressure. If a good form of thermo-regulator be employed there is no necessity for the use of any of the forms of pressure- regulators thus far introduced.