Twelfth Year. 

 Vol. XXII. No. 570. 



JANUAEY 5, 1894. 



Single Gopies, Ten Cents. 

 $3. 50 Per Year, in Advance. 



Contents 



River Courses in the Jura Mountains. Emm. 



De Margerie 



Indiana Academy of Science 



The Cruise of the Clover— Further Remarks on 

 the Aberrations of Audibility of Fog Signals 

 —The Methods Used. Arnold Surges John- 

 son 



Sassafras Trees. Walter J. Quick 



The McMillan Chemical Laboratory. De'os 



Fall 



The Gradual Disappearance of the Range 



Grasses of the West. I. W. Tourney 



Meeting of the Iowa Academy of Sciences 



Baltimore Meeting of the American Chemical 



Society. Charles Piatt 



Letters to the Editor: 



Do Earth Worms Rain Down? Charles E. 



Palmer 



Late-Blooming Trees. F. J. Thompson... 



A Correction. W. M. Beauchamp 



Late-Blooming Trees. Thomas S. Ste- 

 vens 



As to Feigned Death in Snakes. H. H. 



Everett 



The Least Bittern. Fred Mather 



Book-Reviews 



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