Prof. Max Müller also condemns all efforts of approaching the problem of the origin of language through observation of children and animals. The former he calls “nursery philology” the latter “menagerie psychology.” And it is certainly true that the problem of the origin of language cannot be solved from observations of children or animals, because the problem lies in another field. The problem is not how a ready made language is transferred upon the growing mind of a baby but how speechless beings developed into speaking beings. And all the intelligence of clever animals is still very different from the rational thought of man. This is true, but it is also true that good observations of animal psychology and also of nursery philology will throw some light upon the evolution of rational thought. Prof. Max Müller says: “How can we attempt to realise what passes within the mind of an animal?... We can imagine anything we like about what passes in the mind of an animal,—we can know absolutely nothing.” We are fully aware of the fact that the problem of the origin of language is quite different from the problems of animal psychology. A solution of the latter, which are extremely complex and difficult, would not help us to solve the former. This being conceded we can nevertheless see no reason why animal psychology should be condemned and given up as a hopeless task. It is not true that “we can know absolutely nothing about what passes in the mind of an animal.” It is true we cannot see the animals’ feelings and thoughts, but we can see their actions which reveal their feelings as much as and sometimes even plainer than the speech of our brother man reveals his thoughts. Might we not say with the same reason, “We see only the printed book of a scientist (which is an expression of his views as much as the behavior of an animal is of its feelings) but we can know absolutely nothing about what passes in the mind of that scientist. All we can do is to judge from analogy”? And should we on that account give up all reading and studying and also all arguing with others?