220 



PROCEEDINGS OF THE CALIFORNIA 



Fig. 2. From tliis modification results a 



bofly of fourteen planes. 



When the moclifyinti: planes, E. G, 

 H, 1, assume greater importance, the 

 crystal has the appearance of fig'. 2. 



The consideration of these two dif- 

 ferent forms, which can be explained 

 easily by a simple modification, is a 

 very strong presumption that this 

 curious mineral belongs to the ortho- 

 rhombic system. I regret that I had 

 no instrument to measure the angles, 

 and add some precise measurements to 

 the present description. 



Dr. Stout, of Committee on Foreign Exchanges, made a report 

 of progress in the translation and review of foreign publications. 



Dr. Gibbons made some remarks on the recent movements of the 

 barometer. 



Regular Meeting, May 6th, 1872. 

 Dr. James Blake in the Chair. 



Twenty members present. 



Richard J. Bush was elected a resident member. 



Donations to the Library: Smithsonian Reports, 2 vols., 1869 

 and 1870. Engineering and Mining Journal. Proceedings of 

 Acad. Nat. Sciences of Philadelphia, Jan., Feb., March and April, 

 1872. Proceedings of the Boston Society of Nat. Hist. Proceed- 

 ings of the Royal Geographical Society of London. Canadian 

 Naturalist. Monatsberich der Koniglich. Preuss. Akad. der Weis- 

 senschaften zu Berlin. Am. Jour, of Arts and Sci., April, 1872. 

 Am. Naturalist, April, 1872. Bulletin of Essex Institute. Am. 

 Chemist. Effemiridi della Societa de Letture e Conversazioni Sci- 

 entifiche. A description of the genus Protostega. On the Re- 

 constitution of the Municipal Lib. of Strasburg. Bulletin de la 

 Soci6t(^ Malacologique de Belgi()[ue. 



Dr, Blake exhibited several Indian relics found in the mountains 



