FIELDS M and N 



Columns 45 and 46; 



47 and 48 



Field M 

 Column 46 



Field P 

 Column 51 



Field Y 

 Column 71 



4 4 



5 

 5 6 



4 -^_^^ ^____j ^ 4 



5 " "~"^^~""~~~~"~— ~ 6 



4 6 5 



5 4 5 



If double coding occurs in the 

 two Fields, M and P, 



it must mean that each duration 

 in Field P is applicable to each 

 dose in Field M-- 



otherwise, two lines are 

 necessary (or only one of these 

 is selected for coding, according 

 to the coder's judgment, with the 

 other information in the language 

 portion). 



18. Symbols available for additional items of Fields M and N 



Columns 46 and 48: Only Symbols and 1 through 9 are permitted in these columns by the 

 CBCC. This restriction is made to permit direct correlation between the dosage fields (Fields M and 

 N) and the evaluation field (Field Y). By virtue of this limitation, the IBM zone punches were made 

 available for specific purposes. (See Divisions 5, 6, 7, 8, 9, and 10). Having assigned special 

 meanings to the zone punches, letter symbols can not now be used in this column in any case. 



Columns 45 and 47: In Field M there are eleven scales, indicated by Symbols 1 through 9, A, 

 and B. In Field N there are nineteen scales, indicated by Symbols 1 through 9 and A through J. There- 

 fore, Symbols C through Z are available in Column 45 of Field M and Symbols K through Z are available 

 in Column 47 of Field N for new scales. 



19. File of coded biology data on IBM punched cards arranged according to symbols for dosage 

 concentration and quantity 



The CBCC has not established files of IBM punched cards arranged according to entries in 

 Field M and by entries in Field N. Although searches for information from the files often involve 

 sorting according to designated dosage limitations, this particular sort is almost never a primary sort, 

 but secondary to having first selected specific actions or specified test organisms, etc. , for which 

 there are special IBM punched card files. 



20. Double coding in Fields M and N 



Fields M and N can be double coded according to the explanations of Divisions 15, 16, and 17. 

 Any two symbols coded in Column 46 or 48 are both punched in that column on the same IBM card. 



94 



