THE NATURE STUDY IDEA (New Edition) _Cloth, 12mo, $1.25 postage extra_ "It would be well," the critic of _The Tribune Farmer_ once wrote, "if 'The Nature Study Idea' were in the hands of every person who favors nature study in the public schools, of every one who is opposed to it, and most important, of every one who teaches it or thinks he does." It has been Professor Bailey's purpose to interpret the new school movement to put the young into relation and sympathy with nature,--a purpose which he has admirably accomplished. THE MACMILLAN COMPANY PUBLISHERS 64-66 Fifth Avenue NEW YORK * * * * * Transcriber's Notes: The square root symbol is indicated by sqrt(..) Exponents are indicated by ^ Bold in a table is indicated by =..=