SÉANCE DU 8 JUIN 1919. XIX 



Harvey('R.-B.). — Hardening pioren in plants and devlopments 

 from frost injury. 



HoFFER (G.-N.), JoHNSOX (G.) et Ataxasoff (D.). — Corn- 

 l'ootrot and wheatscab. 



Jensex (Ch.-E.). — Relation of organic soil colloïds to plowsole 

 in Citrus groves in Southern Calil'ornia. 



Jones (F.-R.). — Yellow leafbotch cl" alfalfa caused by the 

 fungus Pyrenopeziza medicaginis. 



KuNKEL (L.-O.). — Tissue invasion by Plasmodiophora Bras- 

 sicse. 



Kylb (C.-H.). — Shuck protection for ear corn. 



Levixe (H.-N.) et Stakmax (E.-C). ^- A third biological form et 

 Puccinia graminis on Avlieat. 



Levixe (M.). — Further notes in the sporadic appearance of 

 non-edible niushrooms in caltLvated mushroom beds. 



Mc-MiLLAN (H. -G.). — Fusariiim-hM^hX of potatoes under 

 irrigation. 



Me. MuRRAN. — Peean Rosette in relation to roil defîciencies. 



Me. Rae (W.). — Phj'tophtova nieaciii n. sp. in Hevea brasi- 

 liensis. 



MuRRiLL (W.-A.). — Cuban Polypores and agarics. 



Peltier (G.) et Neal (O.). — Overwintering of the Citrus- 

 canker organism in the bark tissue of hardy Citrus hybrids. 



Pbyronel (B.). — • Secondo elenco di funghi di Val San Martino. 



Petch (T.). — Revisions of Ceylan fungi (IV et V). 



— Ceylan Lentini. 



— A preliminary list of Ceylan Polypori. 



— ïhe girth incrément oï Hevea brasiUensis. 



— Additions to Ceylon fungi. 



— Early Ceylon seed lists. 



RiEL (P.). — Compte-rendu des excursions mycologiques et en- 

 tomologiques de la Société linnéenne de Lyon. 



— Première année 1910. 



— Deuxième année 1911. 



— La première exposition de Champignons de la 



Société linnéenne de Lyon. 



RoDNEY, True (H ) ,Black (O.-F.), etc. — Physiological studies 

 of normal and blighted Spinach. 



Schamel (A.-D.), Scott (L.-B.) et Pomeroy (C.-S.). — Citrus- 

 fruit improvement. A study of bud variation in the Washington 

 nave Orange. 



SeoFiELD (C.-S.). — Effect of farm manui'e in stimulating the 

 yields of irria^ated field crops. 



