FIELD T-3 

 Columns 62, 63, and 64 



5. Symbols of the 3-- series; the general plant-regulatory category of test compounds' specific 

 effects on plants; the plant- regulatory use for which the test compound is evaluated 



Symbols of the 3-- series are used ONLY when one of the specific effects of the test compound 

 (Fields T- 1 and T-2) occurs in plants or when the compound is tested for one of the specific effects on 

 plants whether or not it proves capable of causing the effect. 



6. Symbols available for additional items of Field T-3 



There are an enormous number of symbols available for use in Field T-3, even if the restriction 

 were continued that no letters be used for forming symbols of the field. 



7. File of coded biology data on IBM punched cards arranged accoring to symbols for categories 

 of Field TO 



The CBCC maintains a file of information punched on IBM cards in which an entry has been 

 made in Field T-3. 



8. Double coding in Field T-3 

 Field T-3 is never double coded. 



157 - 



