TECHNIQUE OF EYE DISSECTIONS 



water, and it will slowly unfold itself by "bal- 

 looning" out into a perfect and beautiful 

 specimen. (Fig. 40.) But, if it is desired to 

 study the specimen closely, it is better to sus- 

 pend it in a jar or bottle made of thin glass, 



Fig. 40 Isolated retina, with optic nerve attached. 



and containing a 5 per cent, solution of formal- 

 dehyde. Eemember that the retina is a deli- 

 cate membrane in any state; the slightest 

 rough handling may cause it to be torn, or 

 otherwise damaged. If the vessel, in which 



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