C. H. STOELTING CO. 



3145 W.RANDOLPH ST.. CHICAGO 



■j 4 



■ " *' 



Botanical Apparatus and Supplies 



for Morphology, Physiology, Ecology 



SPECIALTIES 



Potometer, Clinostats, Auxometer, Wardian 



Cases, Clement's Photometer, Etc. 



Microscopical 



Objects 



especially prepared 

 and classified 

 the use of 



Teachers and 

 Students 



Botany, Entomology, 

 Zoology, Physiology 



Bacteriology, 



also 



special sets of objects covering Cotton and 

 Woolen Fibres, Paper Makiug, Starches, 

 Pharmaceutical Preparations, etc. 



The quality of our preparations is un- 

 equalled, while the prices are extremely 

 low. 



We also offer over 20,000 Lantern Slides 

 covering a great number of Educational 

 Subjects, Complete catalogue free, 



WILLIAMS, BROiVN & EARLC. 

 Depf. 24,918 Cbestnut SUFl&nadelphla^Pau 



a. 



3- 



4 



Tky Albert A. MicHelson 



X. Wave Motion and Interference. 



Comparison of the Efficiency of the Micro- 

 scope, Telescope, and Interferometer, 



Application of Interference Methods to 

 Measurements of Distances and Angles. 



Application of Interference Methods to 

 Spectroscopy. 



5, Light Waves as Standards of Length. 



6. Analysis of the Action of Magnetism on 



Light Waves by the Interferometer and 

 the Echelon. 



7. Application of Interference Methods to 



Astronomy. 



8, The Ether. 



With 108 text figures and three full-page lithographs. 



Numerous practical applications of recent theories in optics together with accurate 

 illustrations and descriptions of apparatus add materially to the value of this book. 

 Students of physics and astronomy will find here an admirable condensation of the some- 

 what scattered literature of the subject, presented in an original and entertaining manner. 



Price $2.00 net; 92.13 postpaid. 



Ih^ University of CHi 



J. 



CKica^o 



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