FIELD A 

 Column 9 



(1) PHYSICAL STATE OF THE TEST COMPOUND 



(2) INDICATION OF DIRECT, MASS APPLICATION VS. REMOTE, 



PARTICULATE APPLICATION (I. E , DISPERSION VS. 

 APPLICATION OF THE UNDISPERSED COMPOUND) 1 



(3) INDICATION THAT INFORMATION ON CORRELATION OF 



ACTIVITY AND CHEMICAL STRUCTURES OCCURS IN 

 THE DATA SOURCE 



Organization 



Organization of Field A is based on seven major items, represented by Symbols 1, 2, 3, 4, 5, 

 6, and 7. (Consult the Code for definitions of these symbols. ) Each of these seven symbols is modi- 

 fied by IBM zone punches to form related symbols for indicating dispersion . (See the explanation of 

 the IBM card in the Appendix for the definition of zone punches. ) For example, Symbol 2 (one punch 

 only, in the 2 position on the IBM card) codes a liquid, pure compound, applied undispersed ; Symbol B 

 (two punches on the IBM card in Column 9: one in the 2 position and one in the 12 zone punch) codes 

 a liquid, pure compound, applied as a spray ; Symbol K (two punches in Column 9: one in the 2 position 

 and one in the 11 zone punch) codes a liquid, pure compound, applied as a mist or aerosol. Thus, one 

 punch is provided (in the 2 position) common to all three of these code units so that if in a file it were 

 important to be able to sort out all liquid, pure compounds, it might be done with a single sort on that 

 common punch. 



General Use 



In Field A is coded the state of the test compound at the time of its introduction to the biological 

 component or components; this is consistent with the coding of all other fields dealing with the appli- 

 cation of the chemical (Fields B, C, M, N, O, P, and S-3) in which application is also described in 

 terms of the conditions existing at the time of application to the organism to which direct application 

 is made, whether it is the host organism or the test organism. 



Ordinarily, the presence of a host coded in Field J implies application being made directly to 

 that host; therefore, all coding of conditions of application refers to that direct application to that 

 host and no coding implication is made as to the condition of the test compound when it reaches the 

 test organism. (Only two exceptions are made. When, for clarity of a coded statement, there is coded 

 in Field J an inanimate, liquid [or semi- liquid] environment as a host [in essence, a solvent or vehicle] 

 in which the test compound is dispersed, coding of application, in Fields A, B, C, M, N, O, P, and 

 S-3, describes application to the test organism . The second exception is described in Division 3 of 

 the Specific Directions and Explanations below. ) 



The dispersing of a compound in applying it may appear to be a manner of application, the 

 coding of which has been assigned to Field S-3. However, distinction between the second use of 

 Field A (indicating whether the compound is applied dispersed or undispersed) and the use of Field S-3 

 can be understood by examination of the two fields. Field A is concerned with describing the compound 

 that is being administered and is particularly concerned with the condition of that compound when 

 introduced to the animal or plant. Coding the compound's being mechanically dispersed as a spray or 

 aerosol is as much a description of its condition as is the coding of its being a liquid or a solid or 

 dissolved, etc. 



"Dispersion" is used here to mean scattering the test material by use of a sprayer, atomizer, duster, 

 aerosol; "dispersion" is NOT used in Field A definitions of the Code to describe mechanical spreading 

 or smearing of the test material over the surface of--or diffusing through the substance of- -a test 

 organism or host. An examination of the Code terms will clarify this. 



3 - 



