4 Eugenics Record Office, Bulletin. 



the lines connecting the individuals on the maternal side. That the 

 patient's symbol may stand out more prominently and make the read- 

 ing of the chart easier, the fraternity to which he or she belongs may 

 be dropped below the others.) 



Besides the lines and individual symbols a nomenclature is used 

 that gives in brief much information for the interpretation of the 

 chart. The following capital letters are used inside or around the 

 individual symbols as follows: 



A alcoholic, decidedly intern- M migrainous, 



perate, N normal, 



B blind, Ne neurotic, 



C criminalistic, P paralytic, 



D deaf, S syphilitic, 



E epileptic, Sx sexually immoral, 



F feeble-minded, T tubercular, 



G gonorrheal, W vagrant (tramp, confirmed 



I insane, runaway). 



An index hand points to the individual whose heredity is being 

 studied. 



A line under a symbol indicates that this individual is or has been 

 an inmate of some Institution. 



A small black disc at the end of an individual line indicates a 

 still-birth or miscarriage. 



When the individual is the subject of several defects or diseases, 

 the additional letters are arranged around the individual symbol. 

 Symbols for traits that are not designated above are written beneath 

 the individual symbol. When no letter accompanies the individual 

 symbol it means that no definite data had been secured at the time the 

 chart was made. The trait — alcoholism, criminality, deafness, epilepsy, 

 feeble-mindedness, insanity, etc. — which the field worker is chiefly 

 studying may be called the primary trait for the chart or pedigree. 

 An individual showing the primary trait is represented by a solid 

 symbol, printed (if desired) in color with the corresponding letter 

 intaglio.' These symbols are shown in full size in plate V. 



1 Red Is being used for epilepsy, green for insanity, violet for criminality, 

 black for feeble-mindedness. When the individual does not show the primary 

 trait or associated secondary trait he is marked "N," but this does not neces- 

 sarily mean that he is normal in all respects. 



