EDITORIAL. 343 
author and an editor of chemical and mineralogical works, his 
great modesty withheld him from publication in geological lines, 
so that it was chiefly as a teacher that his wide observations were 
made serviceable. The writer owes to Professor Nason, as his 
first teacher in geology, a debt of gratitude for the initial 
awakening of what has become the dominant interest of his life. 
Professor Nason was one of the founders of the American Geo- 
logical Society. C. 
