Geology and Mineralogy. 291 



hydrofluoric acid, while not acted on by nitric or 

 acid. There were : 1 1 - < > leaf-like tonus, apparently 

 are not yet fully explained.— Prof. Roy. Soc. Edinb., 



address by Dr. T. Sterry Hunt sustaining the pre-Ca 

 of the Taconic schists, throws more doubt than is i 



different geologists. It does not present, as a reason 

 any facts from the author's personal investigation eonv 

 geologists of errors in their statements or conclusions, 

 mentions what the author regards as a possible source 

 any study of folded metamorphic strata, and urges thi 



The pai 



ragraphsays: "The speaker insisted upon 



<>ng the houndars "ivgh 



