on psychology of judgment, [165-167];
on thought and reflection, [177], [178]
Mixed ideas. See [Ideas]
Moffat, R., on invention of languages by children, [263]
Monboddo on the origin of speech, [240]
[Monkeys], general intelligence of, [60], [61], [100], [101];
discovering mechanical principles, [60], [61], [213], [214];
more intelligent and imitative than parrots, [153];
recognizing pictorial representations, [188];
understanding words, [369];