The Microbial World
Online
0 registered users and 13 anonymous guests on-line.
You are an anonymous guest. You can register here.
Figure 1-6 The swan neck flask experiment
Pasteur filled a flask with medium, heated it to kill all life, and then drew out the neck of the flask into a long S shape. This prevented microorganisms in the air from easily entering the flask, yet allowed some air interchange. If the swan neck was broken, microbes readily entered the flask and grew.