Note 54 — Chapter IV · The Growth of Different Organisms in a State of Purity: Their Autonomy.[49]
Frank Faulkner translation
To shake the liquid without danger of introducing exterior particles of dust, we apply the flame of the spirit lamp to the drawn-out neck of the flask, and close up the open end; we may then shake our flask without risk. We must afterwards reopen the end of the drawn-out neck for the purpose of re-establishing communication with the exterior air.