502 proceedings: botanical society 



That the development of the present flood plain has taken place 

 within relatively recent times is supported by the fact that the bottom 

 of these tributaries of the Coeur d'Alene basin as far as investigated 

 has been found to be cored by a deposit of almost pure diatomaceous 

 sediment varying in depth from a few inches to several feet. The 

 early development of river banks throughout the Coeur d'Alene and 

 St. Joe arms of the lake furnished channels down which vast quantities 

 of silt have been conveyed. Only at the height of the spring flood, 

 therefore, is there an appreciable deposition over areas beyond the con- 

 fines of the river banks. As a result the soil of the meadows is very 

 largely composed of diatomaceous earth and muck in various stages of 

 development. 



In a short paper on Plant pathology in Denmark in recent years, 

 Dr. F. KoLPiN Ravn, professor of plant pathology in the Royal Agri- 

 cultural College of Denmark, Copenhagen, described the organization 

 for investigational work in plant pathology provided for at the Royal 

 College of Agriculture and Experiment Stations. The College also 

 conducts winter schools and extension work. The plant inspection 

 service is under a special commission which inspects and certifies plant 

 products exported to foreign countries and acts as a judicial body in 

 connection with a new system of seed certification which guarantees 

 the purity and viability of practically all the seed sold in Denmark. 



Chas. E. Chambliss, Recording Secretary 



