"WITH THE PUBLISHER 

 THE 



LABOEATOEY WOEK 



A COURSE OF NATURAL SCIENCE 



BY 



A. G. EAEL, M.A., F.O.S. 



LATE SCHOLAR OP CHRIST'S COLLEGE, CAMBRIDGE 

 SCIENCE MASTER AT TONBRIDGE SCHOOL 



UNIVERSITY OF CALIFORNIA 



^' * * * i-f'OG " 



LONDON 

 LONGMANS, GEEEN, AND CO, 



AND NEW YORK : 15 EAST 16 th STREET 

 1890 



All rights reserved 



