PREFACE 



The present volm brings together in brief form 

 fundamental priix ipl >f biology for the college student 

 the general reader 



It is well recogni/i that there is no adequate subst 

 for detailed laborator vork on the structure and physic 

 of representative ory -m> as a means of affording a 

 hand knowledge of ;| acts and methods of biology. I 

 ever, the author I ili/cd with increasing force thai 

 student's correlation the laboratory data from day to 

 and accordingly hi- preciation of the broader aspec 

 the subject are great enhanced by a synchronous 'run 

 account' of the um lying principles. The material 

 this volume has pro 1 to be of great value for this pur 

 in a course* on (iencr Biology elected each year by se\ 

 hundred Yale underg dilates. 



The large problems f life are common to both zoology 

 botany, and therefoi both animals and plants have 1 

 drawn upon for illust tion and discussion. This inetho 

 presentation accords ith the author's conviction that 

 general biological vie point is the most favorable mean 

 approach both to a road knowledge of living phenon 

 as a part of a 'lilH'il 1 education, and to more advai 

 studies in zoology ad botany which are prerequisite 



