SENDING TISSUES TO LABORATORIES 113 
of sections should be placed in tightly closed retainers which 
should in turn be well packed in ice. This should be done at 
all seasons of the year. The tissues should be sent as promptly 
as possible and by the quickest route. 
2. In case of suspected rabies the entire head should be 
sent packed in ice. It need not be placed in a separate re- 
tainer. If the entire brain is removed and placed in glycerin, 
it can be shipped without ice. 
3. Specimens for histological examination only or for 
museum purposes may be sent in 10% formalin. 
