X CONTENTS 



PAGE 



Appendix I. — Directions for Laboratory and Field Work 391 



Appendix II. — Reference Books . . 426 



Appendix III. — The State and Territorial Agricultural Ex- 

 periment Stations . . 438 



Appendix IV. — Botanical Supplies . . . 440 



Glossary . . 443 



Index . . . . ^ 451 



