284 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



green to olive-green color, a waxy lustre, and is quite soft. 

 Found at Leiperville, Delaware County, Pa. ; described by 

 G. A. KG nig. 



Liskeardite. A hydrous arsenate of aluminium and iron, 

 related to evansite. It has a white color with a slight blu- 

 ish tint, and is observed in thin fibrous layers lining hollows 

 in quartz and other minerals. From Liskeard, Cornwall; 

 described by N. S. Maskelyne. 



Lithiophilite. A phosphate of manganese and lithium, 

 analogous in composition to triphylite, which is a phosphate 

 of iron and lithium. It is found in large masses, commonly 

 of a delicate salmon color and a sub-resinous lustre. It has 

 three distinct cleavages, two at right angles to each other, 

 and a third, prismatic. Found at Branchville, Fairfield 

 County, Conn., where it is immediately associated with a 

 large amount of a jet-black manganesian phosphate formed 

 from its alteration ; described by G. J. Brush and E. S. Dana. 



Mangantantalite. A manganesian variety of tantalite 

 (9.5 per cent. MnO) from Uto, Sweden ; described by A. E. 

 Nordenskiold. 



Pandermite. A hydrous borate of calcium. It has a 

 snow-white color, and in appearance resembles a fine crystal- 

 line marble. Found in rounded masses imbedded in gypsum 

 at Pandemia on the Black Sea ; described by G. vom Rath. 



Penwithite, A hydrous silicate of manganese. It is a 

 highly vitreous, transparent, reddish-brown mineral, occur- 

 ring with quartz and rhodochrosite. From the district of 

 Pen with, Cornwall ; described by J. II. Collins. 



Picroalumogene. A hydrous sulphate of magnesium and 

 aluminium, differing from pickeringite in its larger percent- 

 age of water. It is a white or slightly reddish mineral, form- 

 ing stalactitic fibrous masses in the iron-mine of Vigneria, 

 Elba ; described by G. Roster. 



Pseudobrookite. A mineral similar in composition to me- 

 naccanite (titanic iron), but unlike in crystalline form. It is 

 found sparingly in minute thin tabular crystals belonging to 

 the orthorhombic system, and closely resembling brookite in 

 general appearance and habit. The color is dark brown to 

 black, and the lustre metallic adamantine; opaque. From 

 the Aranyer Mountain, Transylvania ; described by A. Koch. 



Pyrophosphoritc. An anhydrous pyrophosphate of cal- 



