SCIENCE 



New Series. 

 Vol. IX. No. 229. 



Friday, May 19, 1899. 



Clieniicals ? Chemical Apparatus. 



O 



u 

 o 



X! 

 J 



C 

 C 



a 



o 



u 

 CA5 



Greenough's 

 Binocular 

 Microscope 



(two=fifths full size) 

 made by 



Carl Zeiss, Jena. 



P 

 > 



? 



PS 



C 



■0 



c 



o 

 3 



EIMER & AMEND, New York. 



