¥ 



THE FITNESS 

 OF THE ENVIRONMENT 



AN INQUIRY 



INTO THE BIOLOGICAL SIGNIFICANCE OF 



THE PROPERTIES OF MATTER 



BY 



LAWRENCE J. HENDERSON 



ASSISTANT PROFESSOR OF BIOLOGICAL CHEMISTRY 

 IN HARVARD UNIVERSITY 



IN PART DELIVERED AS LECTURES IN THE 

 LOWELL INSTITUTE, FEBRUARY, 1913 



THE MACMILLAN COMPANY 

 1913 



All rig/its reserved 



