FIELDS M and N 



Columns 45 and 46; 



47 and 48 



to which the coded dose is applied is only suggested by the coding in Field T-2, since in this case 

 the coding in Fields H and I indicate only the location of the test organism, tumor, or pathology in 

 the host. 



9. Summary of Relations between Fields M and N and Fields J, E, M. and I and the use of 

 Symbols # and in Columns 46 and 48 as described in Divisions 6, 7, 8, and 9 



The following is a diagrammatic explanation of the coding procedure (or interpretation of coding) 

 indicating the organism or structure to which the dose, as coded in Fields M and N, applies. The 

 vertical arrow indicates in each case the field to which the dose coded in Field M or N applies. (Only 

 Field N is used in these diagrams. ) The curved, broken- line arrows indicate the shift in meaning 

 which is given by the zone punches in Fields M and N. 



With no zone punch in Field N (or M), the site of the 

 dosage is directly to or in the test organism in Field E. 



With the 1 1 zone punch in Field N (or M), the site of 

 the dosage is directly to or at the anatomical part 

 coded in Field H (or I) instead of the organism in to to 

 in Field E. (See Division 5. ) 



Field J 

 coded 



(=T) 



E 

 X 



H 

 3 



j(=A) 



N 







16 



-or- 

 # 

 1 



(=1) 



T-2 

 C 



With no zone punch in Field N (or M), the site of the 

 dosage is directly to or in the host (living or non-living), 

 in Field J. 



With the 11 zone punch in Field N (or M), the site of 

 the dosage is directly to or in the test organism in Field E 

 instead of the host In Field J. (See Divisions 6 and 7. ) 



With the zone punch in Field N (or M) and Field J coded 

 with a symbol beginning with any of letters S-Z (Symbol S, 

 e. g. , is formed by IBM 2 punch plus the zone punch in 

 Field J; Symbol T by the 3 punch plus the zone punch, 

 etc. ), the site of the dosage is directly to or at the test 

 organism's anatomical part coded in Field H (or I) instead 

 of either the host in Field J or the test organism in Field E. 

 JSee Division 8, first two paragraphs. ) 



With the zone punch in Field N (or M) and Field J coded 

 with a symbol beginning with any of letters 1-9 or A-R, 

 the site of the dosage is directly to or in none of the host 

 in Field J, the test organism in Field E, or the anatomy 

 coded in Field H (or I), but the coding in Field T-2 may 

 suggest the site. (See Division 8, last paragraph. ) 



10. Dosage given in terms of the biologically active portion of the test compound molecule; use 

 of Symbol * (the IBM 12 zone punch) in Column 46 or 48 



Occasionally, an author expresses a dosage in terms of the part of the molecule that is known 

 to be the biologically active portion. For example, in calculating the dosage of a test compound which 

 is administered as any one of several salts, the dosage is calculated on the molecular weight of the 

 base of the compound regardless of the total weight of the entire salt molecule. Since the total 

 compound used must be regarded as the test compound, such as a salt, the fact that the dosage is 

 not expressed as a weight-or volume of that total test compound, but only as the biologically active 

 portion, is distinctively indicated by using the 12-zone punch, coded by Symbol *, in Columns 46 

 or 48 or both. 



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