﻿/ V { 



tUt^ttf A COURSE OF 



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 SCIENCE 

 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. 



Honfcon : 

 MACMILLAN AND CO. 



AND NEW YORK. 

 1888 



[All Righfs resei-vtd.] 



