136 MINUTES OF MEETINGS. 



the ferruginous quartz veins of the talcous rocks that 

 stretch with little interruption from Marquette westward, 

 along the height of land to the West end of the lake, and 

 thence northerly to the dividing ridge between the waters 

 of Lake Superior and Lake Winnipeg; but to say that these 

 veins will be productive, as mining operations, would not 

 be warranted at present. In countries where the veins are 

 heavy and productive, the stream gold of the valleys, 

 which results from the decay of the vein matter, does not 

 always repay the expense of washing. 



To be able successfully to mine and crush quartz rock, 

 the width of the vein, distance from navigation, conveni- 

 ence of timber, presence of water and water power, and 

 the price of labor, are as much a part of the results as the 

 richness of the vein. 



Mr. George R. Tuttle exhibited specimens of polished 

 iron ore from Lake Superior, resembling the Slickensides 

 of the Germans. 



On motion Dr. R. F. Strickland was elected a member of 

 the Academy. 



Adjourned for two weeks. 



John Kirkpatrick, Seo'y. 



Cleveland, January 8, 1858. 



The Academy met with Prof. J. P. Kirtland in the chair. 

 The minutes of last meeting were read and approved. 



Mr. G. A. Hyde presented specimens of feruginous and 

 calcareous concretions from the blue marl of this vicinitj'-. 



Certain lower jaw bones and teeth were referred to a 

 committee for identification. Committee, Messrs. Tuttle, 

 Allen and Dr. Atkinson. 



Mr. E. Stair, by Dr. Atkinson, exhibited specimens of 

 Ornithorhyncus from Australia. 



Prof. Jehu Brainerd read a paper on the Analysis of the 

 Berea Sandstones. 



