/6 / 9f ^ 



SCIENCE 



New Seeies. 



Vol. VIII. No 195. 



Friday, September 23, 1898. T.^TB"^cnLZ%,^.oo 



NEW GRAND MODEL. 



DDS8 Continental Microscope. 



Adapted especially for the more difficult Biological Work and for Photo=Micrography. Com> 



plete 264 -page Catalogue and Supplement of Microscopes, Accessories 



and Laboratory Supplies mailed free. 



BAUSCH & LOMB OPTICAL CO. 



CHICAGO: DnPHPtJTPD N V NEWVORKCITY: 



State and Washington Streets. K'-'^l • CO 1 EiK» i>« I. Broadway and 25th Street. 



