News and Notes 



107 



"A study of protoplasmic movements in fungi," by F. M. 

 Andrews. The slow oscillations of the protoplasm in the aerial 

 filaments of certain moulds grown in gelatin cultures were sub- 

 jected to variations in heat and light and the influence of various 

 gases and solutions. The transpiration optimum was found to 

 be 23-26° C. Pure hydrogen gas, cold, darkness, glycerin solu- 

 tion, etc., caused the movements to gradually cease. 



" Cardinal temperatures for germination of uredospores of 

 cereal rusts," by E. C. Johnson. The optimum for Puccinia 

 graminis and five other species was found to be 12-17° C. 

 Higher temperatures retarded germination, hence there is less 

 development in spells of hot weather. Professor Arthur would 

 like to know why teleutospores will not grow. Out of 137 

 species, material of which seemed to be in perfect condition, he 

 succeeded during one season in germinating only 37 for purposes 

 of inoculation. 



W. A. Murrill. 



