34 C. Friedel and J, M. Crafts 
north after Dr. Hays’s return, until assured by him that he dis- — 
in their unquestionably close affinities to the New York forms 
alluded to, they certainly.present another striking evidence of — 
the apparent wonderful uniformity of climatic and other physical 
conditions during these early periods of our earth’s history, over — 
the whole globe. . 
Arr. V.—On the Replacement of one Alcoholic Radical by another — 
4 compounds of the Ether Class; by C. FRIEDEL and J. M.~ 
ORAFTS. 
WHILE engaged in the study of the ethers of silicic acid, we 
noticed that the normal silicate of ethyl,’ 
? The atomic weight this paper are H=1, O=16, C=12, Si=2s8, 
