CONTENTS/' 



Page. 



The storage and germination of wild rice seed 5 



Introduction . 5 



Distril nition 5 



Habitat 6 



Germination of tlie seed 7 



Fall seeding versus spring seeding 7 



Directions for storing the seed 8 



Detailed conditions and results of storage experiments 9 



Packing for transportation 11 



Methods of making germination tests 11 



Effect of temperature on germination 12 



Summary 12 



Description of Plates I and II 14 



The crown-gall and hairy-root diseases of the apple tree 15 



Inti'oduction 15 



Two distinct diseases, crown-gall and hairy-root 15 



Types of apple crown-gall 1<> 



Effect upon the length of life of the apple tree 16 



Suggestions to nurserymen 16 



Data desired 17 



Peppermint 19 



Description 19 



Countries where grown . 20 



Peppermint cultivation in the United States 21 



Cultivation 22 



Conditions injurious to crop 23 



Harvesting and distillation 24 



Description of still 25 



Peppermint oil and menthol 26 



F^xport of peppermint oil 27 



Prices of pej^permint oil 28 



The poisonous action of Johnson grass HI 



o The four papers constituting this Bulletin were issued in separate form on September 7, November 

 17, December 28, 1905, and January 17, 1906, respectively. 



3 



