We here also find minute quantities of blue and green carbonate of 

 copper disseminated through the limestone and spar, and sometimes in- 

 crusting the lead, often forming very pretty cabinet specimens. Sidpku- 

 ret of Copper is also found. 



Fine crystals of sulphate of Baryta and Dogtooth spar are quite 

 abundant at these mines. The carbonate of lime when broken in thin 

 plates along the planes of crystalization exhibits a beautiful double re- 

 fractive power. 



The lead ore occurs in pockets and layers disseminated through the 

 gangue rocks, and from appearances a good deal of mining has been 

 done. From information obtained, I believe the mines well worth work- 

 ing. They have paid well. The ground lies well for drainage, the only 

 thing necessary is an expenditure of capital to place the mines in good 

 working order. The owners will then be fully remunerated. 



At Fowler's mines I noticed lead, zinc and heavy spar, the latter in 

 very clear amber colored crystals, also in blue lamellar forms. 



The above is only a partial report of observations made at different 

 times in Cole County. 



December 5, 1870. 



The President in the chair. 



Seven members present. 



Exchanges received were laid upon the table. 



Dr. Wislizenus read a letter, giving descriptions of certain spe- 

 cimens of Indian pottery found in Perry County, Mo. 



Dr. Wislizenus also noticed the gale blowing to-day (Dec. 5), 

 which had been preceded by a marked change in the atmospheric 

 electricity. About 3 o'clock P.M., yesterday, the electrical 

 manifestations (which had been constantly positive) totally dis- 

 appeared for twenty-four hours, reappearing only at 6 o'clock 

 P.M. of to-day (again positive). The barometer showed no 

 change until last night, when it fell as usually observed in such 

 storms. 



Mr. Regis Chauvenet was elected an associate member. 



"January 16, 1871. 

 The President in the chair. 

 Seventeen members present. 



Dr. A. Wislizenus communicated his annual report of Meteor- 

 ology and Atmospheric Electricity for the year 1S70, illustrated 

 by diagrams, of which the following is an abstract : 



