39° 



POPULAR SCIENCE MONTHLY. 



Charles S. Howe, 



President of the Case School of Applied Science, Cleveland, Ohio; General Secretary o 



the American Association. 



sections for the reading and discussion 

 of the sixty odd papers that were pre- 

 sented. Under the auspices of the 

 Naturalists, Professor Henry Fairfield 

 Osborn gave an interesting illustrated 

 lecture in the lecture hall of the 

 famous old Academy of Natural Sci- 

 ences, his subject being ' Recent Dis- 

 coveries of Extinct Animals in the 

 Rocky Mountain Region, and their 

 Bearings on Present Problems of Evo- 

 lution.' ' The Mutation Theory of Or- 

 ganic Evolution ' was discussed in a 

 series of specially prepared papers by 

 representatives of the most advanced 

 research in their respective fields ; 

 plant breeding being represented by 



Dr. D. T. MacDougal, animal breeding 

 by Professor W. E. Castle, cytology by 

 Professor E. G. Conklin, paleontology 

 by Professor W. B. Scott, anatomy by 

 Professor Thomas Dwight, taxonomy 

 by Professor Liberty H. Bailey and 

 ethology by Dr. W. M. Wheeler. This 

 was one of the best discussions that 

 has been held before the Naturalists, 

 as generally interesting as it was 

 timely. It illustrates the value and 

 need of comparison and coordination of 

 the results of investigation in different 

 fields for the solution of problems com- 

 mon to all. If methods are becoming 

 more and more specialized with the 

 growth of exactitude in the sciences, 



