09 - Part II: Chapter I: How Birds Fly

01 - Part I: "What Nature-Study is" to "The Relation of Nature-Study to Science"

Handbook of Nature-Study, Part 1 by Anna Botsford Comstock

02 - Part I: "Nature-Study not for Drill" to "The Story as a Supplement to the N...

Handbook of Nature-Study, Part 1 by Anna Botsford Comstock

03 - Part I: "The Nature-Study Attitude toward Life and Death" to "Pets as Natur...