24 THE ORIGIN OF LIFE 



strong can containing a quart of colza oil, a good 

 thermometer, some distilled water, and three or 

 four simple chemicals, details as to which will be 

 found in the paper. No incubator is necessary. 

 The sealed and superheated tubes may be left at 

 rest inside a closed south window for one, two, 

 three or more months before opening them and 

 most carefully examining their contents. The last 

 point is all-important, for without the exercise of 

 much care it will be easy enough for an unbeliever 

 or even a hasty observer to fail to discover any 

 organisms. 



