Dr. Bigsby ow the Geology of Lake Ontario. 339 



parts of the cerebral portion of the nervous system, and as 

 this system requires to be studied as a whole, in order to con- 

 firm the particulars which may have been discovered, we shall 

 confine ourselves to the recommendation, that the Academy 

 strongly encourage Dr. Foville to pursue his researches 

 with caution, and to avail himself of the light of comparative 

 anatomy ; and that he be advised not to hasten the publi- 

 cation of any observations, until they appear to himself to be 

 placed completely beyond doubt, and to be susceptible of the 

 most rigorous demonstration. They serve science poorly who 

 encumber her with ill-prepared materials, however copious 

 and specious they may be. — These considerations alone have 

 diverted us from a conclusion in favour of publishing Dr. Fo- 

 ville's Researches on the Brain, so far as they have been com- 

 municated to us, amongst the collections of the Academy, of 

 which they appear to us perfectly worthy, on the double ground 

 of their own interest, and of the good faith with which they 

 have been brought forward. 



(Signed) Dumeril, and 



D. DE Blainville (the Reporter). 

 Certified as a true copy, G. Cuvier, 



Perpetual Secretary, Counsellor of State, &c. 



L. A Sketch of the Topography and Geology of Lake Ontario. 



By J. J. Bigsby, M.D. F.L. and G.S., For. Mem. Amer. 



Phil. Soc. 8^0. 



[Continued from page 274.] 

 'T'^HERE now succeeds the stratum, which by way of emi- 

 -*■ nence, Mr. Eaton denominates the Saliferoiis Rock. It 

 is itself very much the same as the English stratum ; but the 

 sandstones dii'ectly above it differ in containing a large amount 

 of iron. I am inclined to consider this rock, the ferriferous 

 slate and sandstone of Mr. E., his calciferous slate and the 

 geodiferous rock, to belong to the same formation, — that pro- 

 ducing the salt. They are all conformable to each other. I 

 know that many, and I believe that all of them, run into each 

 other. The ferriferous slate and sandstone sometimes alternate. 

 The geodiferous rock abounds in gypsum ; but not by any 

 means so extensively as the calciferous slate. In the saliferous 

 group which I have instituted, the gypsum occupies here the 

 upper beds as in Europe. Their whole thickness is by no 

 means equal to that of tlie red marl ol" England, its supposed 

 representative*. 



• At I). i;{8 of our present volume will be found a dift'ercnt arrangement, 

 by Mr. Kcatiierstoneiiaugh, of tiie formations which appear to be the equi- 

 valents of Mr. Eaton's series. — Edit. 



2X2 Sail- 



