A New BAUSCH&LOMB 



School Microscope 



Special Prices Quoted to Schools 



A most practical, low- 

 priced instrument for sec- 

 ondary and high-school use. 

 The new construction of arm 

 with hand hold and fine ad- 

 justment makes it especially 

 durable for inexperienced 

 pupils to use. 



This microscope has 

 coarse and fine adjustments, 

 2 eye pieces, \ and £ objec- 

 tives, double nose piece and 

 iris diaphragm in stage. 



This microscope should 

 interest every teacher. 



It has so many new fea- 

 tures that can not be told of 

 here that you should send 

 for circular. 



BH4 Microscope 

 Sao 50 



Bausch & Lomb Optical Co., 



Rochester, N. Y. 



New York, Boston, Washington, Chicago, 

 San Francisco, Frankfort a/m Germany. 



Objects 



especially prepared 

 and classified for 

 the use of 



Teachers and 

 Students in 



Botany, Entomology, 

 Zoology, Physiology 

 and Bacteriology, 



also 



special sets of objects covering Cotton and 

 Woolen Fibres, Paper Making, 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, BROWN & EARLE, 

 Dept. N.918 Chestnut St., Philadelphia, Pa. 



Microscopical 



Fossils, Minerals, 



Shells, 

 Mounted Birds 

 and Mammals 



For the amateur or advanced collector. Tools and 

 supplies for all kinds of Natural History work. 

 Illustrated catalogue free. 



Box 377 



A. W.JONES, 



Salina, Kansas 



The 



Modern 



Business Necessity ^^ CAPACITY . 



The famous Calculating Machine. Enthusiastically endorsed the 

 world over. Rapid, accurate, simple, durable. Two models: ox- 

 idized copper finish, $5.00; oxidized silver finish, $10.00, prepaid la 

 U. S. Write for Free Booklet and Special Offer. Agents wanted. 



C. E. Locke Mfg. Co. 182 Walnut St., Kensett, Iowa 1 



STEREOPTICON 

 NATURE STUDY SLIDES 



We are just completing fine sets of slides on 

 Nature subjects comprising amongst others, 



30 subjects on "Bird Babies " 

 30/60 "Bird's Nests and Eggs" 

 50/60 "Butterflies and Moths " 

 40 "A half hour at the seaside n 

 16 "Bird's Beaks " 



Also in preparation a set on Wild Flowers. 



Besides the above we have slides of every 

 part of the world. Illustrated Stories, Bible 

 Subjects, Educational and Comics. 



OVER 20,000 SLIDES IN STOCK 



FOR 



SALE OR RENTAL 



Slides, plain, 25c. & 35c. Colored, from 50c. each up. 

 Catalogues, 20c. Hire Lists, free. 



RILEY OPTICAL INSTRUMENT CO. 



23 East Fourteenth St., New York. 



