NEW CATALOG °f MICROTOMES 



Containing full descriptions 

 and Photographic Illustrations 

 of our entire line of remodeled 

 microtomes and accessories, 

 including several 



NEW MICROTOMES 



This new series is the most 

 ;> x complete and practical ever 

 listed, and every user of a 

 Microtome should have a 

 ", copy of the book for refer- 

 ^mll ence purposes, if for no 

 other reason. Mailed free. 



Bausch & Lomb Optical Co. 



NewYork ROCHESTER, N. Y. Chicago 



THE 



PHYSICAL REVIEW 



A JOURNAL OF EXPERIMENTAL AND 

 THEORETICAL PHYSICS 



American Physical Society 



ERNEST MERRITT, AND FREDERICK BEDELL 



Eighteenth Volume Begins JANUARY 1904 



SAMPLE COPY UPON REQUEST 



THE MacMILLAN COMPANY, 



