Patrick Geddes & J. Arthur Thomson 
Life [PDF ebook] 
Outlines of General Biology

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. OF these large and crowded volumes a brief sketch indicating main endeavours may be of service to the reader at the beginning, and perhaps also at the close; hence a Preface, larger than is customary, may be pardoned.