f ^ 7 ^ "^ 

 A COURSE Of(3cP 



ELEMENTARY INSTRUCTION 



IN 



PRACTICAL BIOLOGY 



BY 



T. H. HUXLEY, LL.D., F.R.S.; 



ASSISTED BY 



H. N. MARTIN, M.A, M.D., D. Sc, F.R.S. 



REVISED EDITION 

 EXTENDED AND EDITED 



BY 

 G. B. HOWES, 



ASSISTANT PROFESSOR OF ZOOLOGY, NORMAL SCHOOL OF SCIENCB 

 AND ROYAL SCHOOL OF MINES, 



AND 



D. H. SCOTT, M.A., Ph.D., 



ASSISTANT PROFESSOR OF BOTANY, NORMAL SCHOOL OF SCIENCE 

 AND ROYAL SCHOOL OF MINES. 



WITH A PREFACE BY 

 PROFESSOR HUXLEY, F.R.S. 



Hontron : 

 MACMILLAN AND CO. 



AND NEW YORK. 

 1889 



\All Rights reserved.^ 



