3. On the presence of rubiduim and caesium in 



triphyline : 



lb. v. S3, p. S74. 



4. A method of recording articulate vibrations by 



means of photography : 



Ib. 3d Series, v. 16, p. 54. 



5. The human ear-drum: 



Journal of Otology, Boston. 



Wilson Hall, the superb physical laboratory of 

 Brown University, stands as a monument not only to 

 the generosity of the late George F. Wilson, through 

 whose bequest it was erected, but also to the un- 

 wearied and conscientious labors of Professor Blake, 

 who personally designed, to the smallest details, the 

 admirable arrangements of the building. 



Modest and unassuming as was his nature, Pro- 

 fessor Blake was always ready to perform, for the 

 good of the community in which he lived, any service 

 which he deemed appropriate to his position. His 

 varied interests may be inferred from the fact that 

 at various times during his residence in Providence 



11 



