Note 74 — Chapter IV · The Growth of Different Organisms in a State of Purity: Their Autonomy.[49]
Frank Faulkner translation
We need scarcely here observe, having done so on previous occasions, that whenever we opened our flasks to obtain specimens, we made use of a fine tube, previously passed through the flame of a spirit lamp, and that we also passed this flame over the surface of the india-rubber, glass stopper, &c., to consume the organic particles of dust which floating about might introduce themselves at the moment when we opened the right-hand tube of the flask.