by sensuous computation and by separate notation, [57], [215];
by savages, [215]
Crawford on Malay language, [351]
Cronise on the climate of California, [261]
Crows, intelligence of, [56], [57]
Cuvier on speech as the most distinctive characteristic of man, [371]
D
Dammaras, counting by, [215]
Darwin, Charles, on intelligence of savage man in relation to his cerebral development, [16], [17];