THE 



EVERY HOME 



should have them. Re- 

 product ions of the 

 world's great paintings 



ERRY 

 ICTURES 



ONE CENT 



each for 25 or more. Size 

 5%x8. (6 to 10 times the 

 size of this picture.) 



Send today 25c for 25 



art subjects, or 25 Madon- 

 nas,or 25 kittens, etc., or 25 

 for children, or $1.00 for the 

 4 sets. 



Send 3 two-cent stamps 

 in January for catalogue of 

 1000 miniature illustra- 

 tions, two pictures, a 

 colored Bird picture and a 

 picture of Mr. Taft. 



THE PERRY PICTURES CO., 



Box 501 Maiden, Mass. 





Ikreuterbucb 



By H. Hicronymus Bock. 



Publisher; Josiam Rihel, 

 Strassburg 1572. Size: 21x32 cm. 369 double pages, 

 excluding index pages, with 555 colored illustrations. 

 Good print and well kept. To be sold. Offers to be 

 directed on A. MEISSMER, Steglitz, Berlin, 

 Siblopstr. 115. 



The 



Journal 

 of 



Geology 



Edited by Thomas C Chamberlin. Published 

 semi-quarterly, with illustrations. Subscrip- 

 tion price, $3.00 a year; single copies, 50 

 cents ; foreign postage, 53 cents 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO 



NEW YORK 





f - 



■>v 



w 



- 





<i 









/; 



f*V 



y$> 



*. 



>> 



% * 



k T/ 



P# *> 



f^aai 



Young Marsh Hawks 



Lantern Slides 



for 



Nature Study 



We are offering for the use of Schools, Audubon 

 Societies and those interested in Nature Study, a 

 series of extremely interesting- and beautiful lan- 

 tern slides from original negatives, photographed 

 from life, illustrating many of our 



NATIVE BIRDS AND INSECTS 



We also offer lantern slides illustrating Zoology, 

 Geology, Botany, Bacteriology, Physical Geography, His- 

 tory, Industrial Subjec/s, and a full line of 



Mounted Microscopical Specimens 



Circulars and Catalogue on application. 



WILLIAMS, BROWN & EARLE 



Manufacturers of Projecting Lanterns, Microscopes 



and Slides 



Dapt. 24, 918 Chestnut Street, Philadelphia, Pa. 



By Albert A. Michclson 



1. Wave Motion and Interference. 



5 



a. Comparison of the Efficiency of the Micro- 6. 



scope, Telescope, and Interferometer. 



3- Application of Interference Methods to 



Measurements of Distances and Angles. 7. 



4- Application of Interference Methods to 



Light Waves as Standards of Length. 



Analysis of the Action of Magnetism on 

 Light Waves by the Interferometer and 

 the Echelon. • 



Application of Interference Methods to 

 Astronomy. 



Spectroscopy. 



8. The Ether. 



With 108 text figures and three full-page lithographs. 



accurate 



practical applications 01 recent lucunw iu v^n^» w& ^*~~ - — - 



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- 



imrVtrx 4._^^a._ -l* a . - _ *1 - mm • • _ _ t 3 __*,«».«•***. Initio minriPf 



manner 



$1.50 



$1 



University of Chicago 



and New YorR 



