SCIENCE 



v^ IrnT Kn ,1,0 Friday, April 21, 1916 f^"" c°pies. u cts 



Vot, XLUI. No. 1112 ' ' Anmtjal SuBSOEipnoN, f6.0( 



_ iho culture olXmu-j^^ _.ial; a vivanim^ ..tiuannm; it\ 



; dtpavimont library; zoological and botanical museums; a lecture^ 



f^room that seats one hundred forty students aud is equipped with .^ 



^Bausc h and Lg]yjl._l|j.^^tern and projection microscope ,; 



~^^^^^ "Mini'^^TT "^ apparar^wiginoaerT' and ;' 



— from College Catalog. 



Bausch & Lomh 

 Balopticons 



predominate in the colleges of the country 

 because Bausch & Lomb quality is an unvary- 

 ing quantity. 



The college that uses Bausch & Lomb appara- 

 tus makes mention of that fact as an asset. 



The Balopticon has reduced optical projection to its 

 simplest terms. A new, illustrated catalog of the 

 complete line is just off the press. Write for your 

 copy NOW. 



Bausch ^Ipmb Optical (o. 



552 ST. PAUL STREET ROCHESTER, N-Y 



New York Washington Chicago San Francisco 



Awarded Qrand Prize for Balopticons at Panama-Pacific Exposition 



