CONTENTS. 



Organization of the Station II 



Announcements vil 



Publications issued in 1919. X 



Station Notes xn 



The Meadow Plant Bug (Bulletin 276) 1 



Analysis Maine grown potatoes (Bulletin 277) 17 



Mineral matters of Maine grown potatoes (Bulletin 277) 20 



Potato pomace (Bulletin 277) 21 



High ridge vs. low ridge potato culture (Bulletin 277) 23 



Different forms of ammonia for potato fertilizer (Bulletin 277) . . 27 



Effect of omitting potash from potato fertilizer (Bulletin 277) ... 30 



Soil test experiment in 1918 (Bulletin 278) 33 



Variation of milk in Ayrshire cows (Bulletin 279) 57 



Appliances and methods for pedigree poultry mating (Bulletin 280) 65 



Transmitting qualities of Jersey sires (Bulletin 281) 89 



Three pink and green aphids of the rose (Bulletin 282) 205 



Food Plant catalog of the Aphididae of the world Part VI (Bul- 

 letin 282) 219 



Report of progress on animal investigations in 1919 (Bulletin 



283) 249 



Variation of milk in Ayrshire cows (Bulletin 284) 285 



Variations and correlations of milk with age in Jersey cattle 



(Bulletin 284) 287 



Variations and correlations of butter-fat percentage with age in 



Jersey cattle (Bulletin 284) 291 



On variation in Tartary buckwheat (Bulletin 284) 296 



Conformation and milk producing capacity in Jersey cattle (Bul- 

 letin 284) 298 



The mechanism of crossing over in the third chromosome of Dro- 



sophila melanogaster (Bulletin 284) 300 



White pine weevil (Bulletin 284) 301 



Spruce budworm (Bulletin 284) 301 



Viability of blackleg organism of the potato (Bulletin 284) 303 



Mosaic disease of the potato (Bulletin 284) 305 



Meteorological observations (Bulletin 284) 306 



Report of the Treasurer (Bulletin 284) 308 



Index report of 1919 (Bulletin 284) 311 



