Monthly average Rainfall, Percolation, Evaporation and Conden- 

 sation at Croydon, Surrey, in England, for the 30 years 1879 

 to 1908, calculated in millimeters and in Centigrade degrees. 



(The English inch is calculated as equal to 25.4 millimeters). 



E. A. BUNYARD. The effect of cold upon pigments in plants. 



(Gard, Chron., 3 ser., 46 (i99) No - Il8 ' PP- 97* 9%)- E. S. R., 

 XXI, Dec. 1909. 



After giving an account of the experiments of Kraemer, the 

 author calls attention to the effect of cold on the changing of color 

 in plants. The rose Frau Karl Druschki had the outer petals 

 changed to a deep carmine after the cold nights of the early 

 summer, and a red pigment was noticed in white geraniums 

 which does not appear when the flowers are grown in greenhouses 

 at high temperatures. Other examples are cited where low tempe- 

 ratures produce red pigments in otherwise white flowers. 



