12 
Proceedings of the Royal Society 
of Science” for references to the papers on the Logic of Relation by 
Peirce, De Morgan, Ellis, and Harley. The philosophers mentioned 
discuss relation in general ; I have restricted myself to the more 
definite subject of relation of men by consanguinity or affinity. 
Table I. — Relationships of the First Order. 
Children, . 
c 
7 
Children 
of a man. 
Children 
of a woman. 
Parents, 
1 
c 
Father 
of a person. 
1 
7 
Mother 
of a person. 
Table II. — Relationships of the Second Order. 
Grandchildren, . 
c 2 
°y 
yc 
7 2 
Children 
Children 
Children 
Children 
of sons of 
of sons of a 
of daughters 
of daughters 
a man. 
woman. 
of a man. 
of a woman. 
Children of parents ) 
c i-i 
cy -1 
yc~ l 
7 1 " 1 
(Brothers and sisters), ) 
Children 
= 0 . 
= 0 . 
Children 
of the 
of the 
father of. 
mother of. 
Parents of children ) 
C-i+i 
c _1 7 
*y -1 c 
7 -i+i 
(Consorts — self. ) ) 
= 1 . 
Fathers 
Mothers 
= 1 . 
of the 
of the 
children of 
children of 
a woman. 
a man. 
Grandparents, . 
c - 2 
C'V 1 
7“ 1 c~i 
7 ' 2 
Father 
Father 
Mother 
Mother 
of the 
of the 
of the 
of the 
father of. 
mother of. 
father of. 
mother of. 
