• CONTENTS 



Physiology— Continued Entry 1363 



Electricity and Mechanical Agents '.'.Entries 873-878, 1364, 2018 



Miscellaneous 



Soil Science : Entries 1365-1372, 2019-2024 



General Entries 277-281 1373 



Acidity and Hydrogen-Ion Concentration -^ ^^ ^^ 



Influence of Biological Agents • ■ ^^ 286 _ 289) 138() _i383 



Fertilization " ' Entries 2 90-294, 1384-1392 



Fertilizer Resources Entries 295-297 



Influence of Salts on Solubility ■ ' Entrieg 2 025-2028 



Soil Classification Methods '.""'.".'.'.. .Entries 298-300 



Miscellaneous 



Taxonomy of Vascular Plants: Entries 301-320 



General "' .Entries 321-332 



Pteridophytes ' * ' Entries 333^67 



Spermatophytes • ^ ' +^' oc 4A«Jm 1393-1397. 2029-2032 



Miscellaneous, Unclassified Publications . . Entries 468-473, 139d , ^ 



Index to Authors' Names appearing in volume VI 



