1 88 1. 3 Trans. N. V. Ac. Sci. 



October lo, 1881. 

 Section of Chemistry. 

 Vice-president, Dr. B. N. Martin, in the Chair. 

 Nineteen members present. 



A paper was read by Mr, James H. Stebbins, Jr., of which the 

 following is an abstract : 



ON some new salts of thymole sulpho-acid, and some new 

 facts concerning the same. 

 60 grms. thymole were dissolved in 50 grms. 66° sulphuric, at a 

 temperature of loo" C. The pink crystalline mass so obtained was dis- 

 solved in water, and converted into the lime salt. 



Calcuon Salt. — This salt crystalhzes with two molecules of water, in 

 rhombic plates, and shows under the polariscope a beautiful effect of 

 circular polarized light. 



Formula. 

 a (Ce H., (C H3) (C3 H7) (O H) S 03). Ca + 2H2 O. 

 a. Calcium salt of alpha thymole sulpho-acid. 



Afnmon/ttm Salt. — This salt was obtained by decomposing the lime 

 salt, with ammonic carbonate. It crystallizes in white rhombic plates, 

 with 2 mols. of water. 



Formula. 

 a Ce H. (C H3) (C3 H7) (N H, S O3) a H + 2 H. O. 

 The sodium salt has likewise been obtained, and will be described in 

 a subsequent paper. 



Remarks were made by Mr. James D. Warner on the nature of 

 the corona of the Sun, etc. Mr. Stebbins reported the yellow colora- 

 tion of the atmosphere in September at the Thousand Islands in the St. 

 Lawrence. 



October 17, 1881. 

 Section of Geology and Mineralogy. 

 The President, Dr. J. S. Newberry, in the Chair. 

 Fifty-one persons present. 



Dr. Newberry exhibited specimens of native lead and oxide of 

 lead from a mine in the Wood river country, Idaho, crystallized 

 gray copper, and fine crystallized rhodochrosite from the Ulay 

 mines. Southwest Colorado. 



Dr. T. Egleston pronounced the crystals of Rhodochrosite the finest 

 he had ever seen, and probably the finest specimens ever yet found. 



