14 Animal Micrology 



the stopper with some heavy instrument, such as the handle of a pocket- 

 knife, pressing the forefinger against the direction of the tap. Turn the 

 bottle round, gradually tapping until the stopper loosens. Should this 

 device prove of no avail (which is very rarely), hold the neck of the 

 bottle in a spirit flame, and quickly withdraw the stopper as the glass of 

 the neck expands. This is a somewhat risky procedure, but is very 

 effectual if done smartly." (Journal of Applied Microscopy, Vol. VI, 

 p. 2116.) The glass of the neck may be more safely heated by looping 

 a heavy cord about it and sawing the cord back and forth until the fric- 

 tion warms the glass. 



