1865. J Mining, Mineralogy, and Metallurgy. 313 



him to the Academy of Sciences of Vienna, tho Lithioniferous micas 

 will yield Lithium, Bubidium, Ceesium, and Thallium. 



M. Hermann has described a new mineral found at Gumeschefsh, 

 in the Ural, which much resembles Wavelite in its mode of occurrence 

 and in composition. To this he has given the name of Planerite. 

 Its composition is, as compared with Wavelite, as follows : — 



Wavelite. 



Phosphoric Acid . 



33-94 



33-40 



Alumina . 



37.48 



35-35 



Oxide of Iron 



3-52 



1-25 



Oxide of Copper . 



3-72 





Water 



20-93 



26-80 



Brushite. — In a sample of " rock guano " from Avis Island, in the 

 Caribbean Sea, a new mineral has been discovered. Dr. Gideon E. 

 Moore has carefully examined this mineral, and he gives the following 

 as its composition : — 



Lime 32*65 



Phosphoric Acid . . . . . 41-50 

 Water 26-33 



100-48 

 These figures, he says, agree exactly with the composition of the 

 neutral tri-basic phosphate of lime 2 Ca O, HO, P0 5 , with the ad- 

 dition of four equivalents of water of crystallization. The crystalline 

 structure has been examined by Professor J. D. Dana, who thus describes 

 the minerals — " The crystals are slender prisms, not over a third of 

 an inch in length. The prisms are monoclinic, and are often flattened 

 parallel to the clinodiagonal with perfect and pearly clinodiagonal 

 cleavage." This new mineral has been named by its discoverer 

 Brushite, after Professor C. J. Brush, of Yale College.* 



Emery has been discovered in Chester, Hampden County, 

 Massachusetts. It is spoken of by Dr. Charles J. Jackson as " an 

 inexhaustible bed of the best emery in the world." It appears to 

 Lave been long mistaken for an iron ore, and indeed used as such. 

 The principal bed of emery is seen at the base of the South Mountain, 

 where it is four feet wide. Its course is N. 20° E.S. 20° W., and its 

 known extent is four miles. Near the summit of the mountain, the 

 bed expands to more than 10 feet in width, and in some places is even 

 17 feet wide. 



The analyses of two varieties — a coarsely crystalline emery of the 

 North Mountain, Cheshire, sp. gr. 3-75 H 9, and the emery from 

 South Hill, sp. gr. 4.02 H 9, are marked respectively 1 and 2 — 



O) (2) 



Alumina .... 46-51 45-50 



Protoxide of Iron . . 44-00 43-00 



Titanic Acid . . . 5 • 00 ] 11 • ^0 



Silica and loss . . . 4-50 J 



100-00 100-00 



* Communicated to the California Academy of Sciences. ' Silliman"s Journal,' 

 January, 1865. 



