Note 148 — Chapter VI · THE PHYSIOLOGICAL THEORY OF FERMENTATION. (continued 2)

We find this fact, which we published as long ago as 1863, confirmed in a work of H. Hoffmann’s published in 1869, under the title Mémoire sur les bactéries, which has appeared in French (Annales des Sciences naturelles, 5th series, vol. xi.). On this subject we may cite an observation that has not yet been published. Aërobian bacteria lose all power of movement when suddenly plunged into carbonic acid gas; they recover it, however, as if they had only been suffering from anæsthesia, as soon as they are brought into the air again.