and of man, [20];
his classification of the animal kingdom, [79];
his logic based on grammar of the Greek language, [314], [320]
Articulation, chap. vii.;
classification of different kinds of, [121];
understanding of, [122-129];
by dogs, [128];
use of, with intelligent signification by talking birds, [129-139];
arbitrary use of, by young children, [138-144];