FIELD F 

 Column 26 



Symbols 1 through 8 [or A through H or J through Q, which represent IBM punches 1 through 8 plus one 

 of the two zone punches, 11 and 12, used for another special purpose]. ) 



6. Translation of size or age into stages of development 



When the stage of development is not specified, but information is given concerning the size 

 or age of the test organism, the following table may prove helpful in selecting the correct code symbol 

 to be employed. 



Code symbols for stages of development of test organisms. 



7. Spermatophytes: further explanation of stages as defined in the Code 



Symbol l--indicating spore stage--is to be used to specify any stage of the haploid (gametophyte) 

 generation of any of the spermatophytes (i. e. , microspores, megaspores, pollen grains and the nuclei 

 of the embryo sac in the angiosperms or the megagametophyte, microspores, megaspore or pollen grains 

 in the gymnosperms). 



Symbol 3--indicating embryo stage--is to be used to specify mature or immature embryos. 

 Symbol 4 is to be used to indicate the mature embryo plus the seed coat (i. e. , the complete seed). 

 Symbol 3 indicates complete embryos (cotyledon[s], radicle, hypocotyl and epicotyl) and may also be 

 used to indicate embryos from which some part has been excised. The excision of a portion of the 

 embryo for discard is indicated in Field G- 1 (or G-2) by Symbol P and the organ excised is specified in 

 Field H-2 or the excision of a portion of the embryo to serve as the test organ is indicated in Field G- 1 

 (or G-2) by Symbol R and the excised organ is specified in Field H- 1. 



8. Symbols available for additional items of Field F 



In the present organization of Field F, all symbols have been assigned. 



9. File of coded biology data on IBM punched cards arranged according to symbols for stage of 

 development of the test organism or sex of the test organism or tumor character 



The CBCC has not established a file of coded data (IBM punched cards) according to coding of 

 Field F. 



10. D ouble coding is permitted in Field F , as explained in Division 4. The two or more entries for 

 sex and stage are punched on the same IBM card, as are the two or more symbols used in double coding 

 either or both sex or /and stage. 



- 47 - 



