School Science and matbetnatics 



A MONTHLY JOURNAL FOR ALL SCIENCE 

 AND MATHEMATICS TEACHERS 



Six Departments — Biology, Chemistry, Earth Science, Mathematics, 

 Metrology, Physics. 



All wide awake teachers of these subjects should become subscribers. 

 This means you. 



Only new material is published in this Journal. 



Published October to June inclusive. $2.00 per year, 25 cents single 

 copy. 



Send your name and address, on a postal card, for sample copy. 



Please say " adv. in N.-S, R." 



Address: 440 Kenwood Terrace, Chicago, III. 



"r The Plant World '"- 



IS AN 



==== Illustrated Monthly Magazine === 



devoted to 



Popular Botany in the Best and Widest Sense 



It is the Official Organ of the Wild Flower Preservation Society of America 

 It will keep you in touch with modern Botanical thought. 



IF 



You ::: rr::"" b~ The Plant World :: ':r You 



Edited by FRANCIS E. LLOYD 

 For Sample Copy send 2c. stamp, addressing 



THE PLANT WORLD, Teachers College, 



Columbia University, New York City 



