Some of Our Lists 

 Agriculture 

 An. Morphology 

 Alg^e & Fungi 

 Birds & Their Food 

 General Botany 

 Entomology 

 Evolution 

 Native Ferns 

 Nature Study 

 Plant Ecology 

 Plant Morphology 

 Play Grounds 

 Portraits 

 Public Parks 

 Trees & Forests 

 Wild Flowers 



Lantern Slides 



-AND - 



Projection Apparatus 



30 SETS ON 30 SUBJECTS 

 100.000 OF OUR SLIDES IN USE 



Educational Slides Our Specialty 



Send for descriptive lists. If you will send 

 your name and official positon, and state the 

 subject in which you are interested, we will 

 place your name on our mailing list and send 

 you literature from time to time. 



PROJECTION FOR SCIENCE TEACHERS AND LECTURERS 

 Is a booklet of 76 pages containing descriptive lists of slides and appa- 

 ratus and it will be sent to teachers and lecturers who make the request, 

 giving name and official position plainly written. Please refer to this ad, 



Conrad Slide and Projection Co. 



4028 JACKSON BOULEVARD, CHICAGO, ILLINOIS. 



•*, 



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