KEY to the 

 Biology Code 



of the 

 CHEMICAL-BIOLOGICAL COORDINATION CENTER 



A manual for the use of the symbols 

 of the Code, for coding results, pro- 

 cedures, and conditions of tests for 

 biological responses to chemicals 



Edited by 



Philip G. Seitner 



in cooperation with 



George A. Livingston and Ann S. Williams 



// 

 'J* 



Ate* 



a// 



Publication 790K 

 NATIONAL ACADEMY OF SCIENCES-NATIONAL RESEARCH COUNCIL 



Washington 25, D. C. 

 1960 



