The science of life : fully illustrated in tone and line and including many diagrams

and has been brought into closer touch with nervous physiology on the one hand and with the behaviour of animals on the other. To summarize the accumulating harvest of the army of workers now busy in all these fields is the task we have set ourselves.

We shall begin by giving an account of the structure and general lite-processes of the most familiar of living things—man. After that we shall take an ampler view of the forms of life, to revise the popular classification we have cited in the preceding section.

INTRODUCTION

~ We shall then be in a position to study the

reactions of life upon life and its general evolution. We shall consider life in health and disease. Then we can come to the finer questions of feeling and thought, to man as a biological type, and to the huge expansion of his range during the last million years, which has made him now the master and main representative of living matter. And so to life as we know it in the city and the street, the home and the laboratory, and its outlook towards time to come !

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