223 



Haijy, Traite de Crista] lographie. 3 vols. 8vo. Paris. 1822. 

 Deposited ly Repuhlican^nstitution. 



Haijy, Traite de Mineralogie. 5 vols. Paris, 1822. Depos- 

 ited hy Republican Institution. 



Haidinger, Uebersicht der Resultate Mineralogischer For- 

 schungen im Jahre, 1843. 8vo. Erlangen, 1845. Deposited hy 

 Republican Institution. 



Zippe, F. X. W. Mineralogie und Geognosie. 8vo. Prag. 

 1846. Deposited by Republican Institution. 



January 2, 1850. 

 Dr. Storer, Vice-President, in the Chair. 

 Present, thirty-nine members. 



Dr. C. T. Jackson exhibited a fossil Calamite from Bridge- 

 water, Mass., one foot in length, and nine inches in circum- 

 ference at the base. It was fluted, with joints from one 

 inch to one and a half long. He also exhibited specimens 

 of salt from the Great Salt Lake in California, and Carbonate 

 of Soda from the Salaeratus Lake of the same region. 



Both of these substances are used for culinary purposes by 

 the settlers of that country. The Salt Lake is situated in Lat. 

 42° 45' 44" north, Long. IIP 26' 34" west of Greenwich, and 

 is 4,300 feet above the level of the Pacific Ocean. The Salae- 

 ratus Lake is near Independence Rock, in Lat. 42° 30' 16" 

 north. The soda appears like ice, filling a depression in the 

 plain, of two acres in extent, and about two feet thick, with 

 no water beneath it. On exposure to dry air the Sal soda loses 

 part of its water and acquires more carbonic acid so as to be 

 converted into the sesqui-carbonate, as seen in the samples 

 exhibited. It is observed that cows and oxen grazing near these 

 Lakes sicken and die, but horses do not suffer. The soil around 

 them is poor and sandy. The principal plants are Artemisia and 



