FIELD J 

 Columns 37, 38, 39, 

 40, 41, and 42 



than to code literally those specific artificial media when used in a test or when the substrate of the 

 microorganism is described merely as "culture medium". 



13. Code symbols of Field J having less than six units 



An author may occasionally identify a host only as to family, for example, for which reason 

 only the symbol for the family would be used. Since this symbol has only four units, Columns 41 and 

 42 would be left uncoded. The CBCC has established the practice of cross-hatching any final unused 

 "code boxes" of Field J on the Code Sheet when the entry is identified only as to family, order, class, 

 or phylum; this is merely to assure the operator punching the IBM card that the short symbol of Field J 

 is deliberate and that the unfilled code boxes do not represent unfinished coding. 



14. Symbols available for additional items of Field J 



Zone punches have not been assigned special meanings in any of the Field J columns. Thus, 

 there are no restrictions on use of any symbol in any column for constructing host symbols. 



The last animal symbol of the present list begins with the letter G and the first plant symbol 

 begins with the letter J. Similarly, the last plant symbol begins with the letter M and the first non- 

 living host symbol begins with the letter S. The letters H and I and N through R in Column 37 are 

 available for expansion of animal hosts (H and I) and plant hosts (N through R). By restricting animal 

 hosts to symbols beginning with 1 through 9 and A through I, plant hosts to symbols beginning with J 

 through R, and non-living hosts to symbols beginning with S through Z, it permits all plant hosts to be 

 recognized (and retrieved) by the IBM 11 zone punch and all non-living hosts to be recognized (and 

 retrieved) by the IBM zone punch. 



15. File of coded biology data on IBM punched cards arranged according to symbols for hosts 



The CBCC maintains a separate IBM punched card file of all the coded chemical- biological 

 data in which a host plays a role, i. e. , all cards on which Field J is punched. This file is arranged 

 according to the sequence of Field J symbols. Therefore, in searching for all information concerning 

 a specific organism (or non-living host, for that matter) that has been used as a host (e.g. , all infor- 

 mation concerning a specific organism that has been experimentally treated for diseases), the CBCC 

 can quickly retrieve it from this field by a single manual action. 



16. Double coding of hosts in Field J prohibited 



Since CBCC coding procedure is dependent on IBM punching methods, two hosts are never 

 coded in a single code line. If all aspects of two tests are so similar that the coding of the two would 

 be the same for all coding fields except that different hosts were used, the two tests could not be 

 recorded in a single line by coding both test organisms in Field J; a separate line is necessary for each 

 host. 



74 



