14 ANNUAL REPORT OF THE 



special report was prepared on the water supply of the district 

 at the request of the U. S. government. As Chairman of the sub- 

 committee on the use of the seismograph in war, much time was 

 given to a project which proved less feasible than the employment 

 of sound waves in locating enemy heavy batteries. The Seismo- 

 graphic Station has been kept in running order during the year, 

 though the issuance of the monthly mimeographed bulletin has 

 been much interfered with and the annual reports for the past 

 two years are yet to be written. 



During the summer, Professor Raymond spent seven weeks in 

 southwestern Virginia and eastern Tennessee in continuation of the 

 Shaler Memorial study of the stratigraphy of the Ordovician 

 strata of the Appalachians. This second season's work on the 

 problem has yielded valuable results which justify the compila- 

 tion of a preliminary report on the progress of the investigation. 



Six models of extinct animals, and four books were added to the 

 student palaeontological collection during the year. 



