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% Devoted to Elementary Science in the Schools 



OFFICIAL ORGAN OF THE 



American Nature-Study 



Three Days in the Mountains ^^''' ^^ ^- ^- ^''^^"'' 



See p. 202 



The Camp Number 



APRIL, 1921 

 Vol. 17 No. 4 Whole No. 143 



20c a copy $1.50 a year 



