1890-91]. SIXTH MEETING. 1$ 



pared with that occurring in limestone in regard to its richness in gold 

 and silver, also the metamorphic veins continued to a greater depth than 

 the non-metamorphic, and that galena veins were often rich in one stratum 

 but poor in others, providing the strata were of different composition., 

 Mr. Dewar went on to give statistics of mines in Cornwall and Devon, 

 and mentioned a table in Percy's metallurgy of lead regarding the pre- 

 sence of silver and gold in galena, which he said he did not propose to 

 improve on. He also treated of auriferous pyrite, giving as an example 

 the Morro Velho mine in Mimas Geraes, in Brazil, one of the richest 

 of that country, in which the workings were on auriferous pyrites, and 

 remarked that quite a portion of the annual production of gold was from 

 iron pyrites. In regard to the different theories of the origin of meta- 

 morphic and non-metamorphic deposits, he found that the former origin- 

 ated as veins of segregation through hydrothermal fusion, and the latter 

 as superficial deposits. In the non-metamorphic deposits the salts 

 occurred as lead sulphate or carbonate, the silver as chloride, the gold as 

 sulphide and chloride, while the solvent solutions were alkaline hypo- 

 sulphites, chlorides, or carbonates. The paper also treated of the solvent 

 power of ferrous and ferric sulphates in relation to gold. 



SIXTH MEETING. 



Sixth Meeting, 6th December, 1890, the President in the chair. 



Donations and exchanges, 60. 



The following Resolutions were passed : — 



Moved by Mr. Hamilton, seconded by Mr. Harvey — 



"That the Institute approve of the memorial presented by the His- 

 torical Section relating to the publication of documents in connection 

 with the northern and western boundaries of Ontario. The Institute 

 also desire to enquire if the correspondence of Governor Simcoe and 

 the archives of the military forces in Canada at and about the period of 

 the establishment of the separate provincial government for Upper 

 Canada recently acquired by the archivist at Ottawa have been examined 

 by the Government with a view to publication either in full or in abstract 

 form as is now being done by the Province of Quebec in the case of 

 similar documents. That the President and Messrs. Bain, Harvey, Boyle 

 and the mover be a Committee to wait upon the Hon. the Attorney- 

 General and brinsT the above matters before him and the Government." 



