423 On Metallic Minerals. 



Also in the country towards tho head of the Missouri.-^ 

 (See Travels of Captains Lewis and Clarke. — Geological 

 Transactions.) 



It is remarkable that pseudo volcanic substances, such 

 as pseudo volcanic carbonate of iron, pseudo volcanic 

 quartz, formerly having cubic pyrites disseminated through- 

 out, the impressions of which still remain, are said to occur 

 in the township of Yonge. 



The following additional note, giving an account of the" 

 iron works on Lake Erie, has been drawn up by my friend 

 Captain Bayfield, R. N. who, in ray absence from Quebec, 

 has kindly superintended the printing of my paper. 



ADDITIONAL NOTE. 



The substance of the following information respecting 

 the iron works in the London District of Upper Canada has 

 been communicated by Mr. J. Harris, R. N., a correspond- 

 ing member of the Literary and Historical Society, who 

 resides on the shores of Lake Erie near the principal known 

 deposits of the iron ore which is the subject of this note. 



The locality of this ore has not, to my knowledge, been 

 visited by any person possessing the geological and minera- 

 logical knowledge which would be requisite to enable any 

 one to give a complete account of the nature, situation, and 

 associations of these deposits of bog ore, or a niineralogical 

 description, founded on analysis, from which might be 

 inferred its value, either in regard to its productiveness of 

 metal or the more or less facility with which it might 

 be reduced. 



In the absence of a more perfect account, the following, 

 which I have drawn from the information furnished by my 



