424 General Notes. [May, 



cific gravity of 5.4 ; the other being gray, yellow in thin splinters, 

 and greenish-gray in powder, and with a specific gravity of 5.1,. 



The mineral is decomposed by concentrated sulphuric acid and 

 has the following composition : 



(Ce La Di Y) 2 3 (Y Fe Ca). 2 3 P.,0 5 ignition 



73.82 1. 26.05 .45 



Some Supposed New Scottish Minerals. — Pilolite, Ru- 

 bislite, Xantholite, Balvraidite, Abriachanite, Haughtonite, 

 Walkerite, Bhreckite, Tyreeite and Torbermorite are names given 

 by M. F. Heddle 1 to some supposed new minerals from Scotland. 

 Some of these are certainly mixtures and products of decomposi- 

 tion ; others are provisional names given to substances " which 

 may prove to be new," and most of them require further examina- 

 tion before being entitled to be classed as new species. Names so 

 given are of little advantage to the science of mineralogy. The 

 numerous analyses given by Dr. Heddle are his most valuable 

 contributions to science. 



Pilolite is the name given to " mountain leather," usually re- 

 garded as a fibrous amphibole. Rubislite greatly resembles the 

 doubtful mineral Hullite, and is found in red granite. Xantholite 

 occurs in impure yellow nodules, somewhat resembling chondro- 

 dite, and appears to be an alteration product. It resembles 

 " grenatite." Balvraidite is an altered felspar, resembling By- 

 townite. Abriachanite is a bluish mineral which may be either 

 fibrous, slaty, powdery or clayey. It is a silicate of iron and 

 magnesia and undoubtedly a decomposition product. Han^htomte 

 is a black mica resembling biotite, but containing more iron and 

 less magnesia. It is found in granite at numerous localities. It 

 appears to be identical with the mica from Pike's Peak, Colorado, 

 previously named, by the present writer, Siderophyllite. Walkerite 

 is a variety of pectolite containing magnesia. Bhreckite is a soft, 

 granular, pale green substance not unlike glauconite, but of un- 

 ' certain affinities. It occurs in veins in granite. Tyreeite is the 

 name provisionally given to a red mud left,after dissolving a large 

 amount of marble in hydrochloric acid." It is undoubtedly a 

 mixture. Torbermorite is a massive, uncleavable zeolite whose 

 main constituents are SiO a 47, Al 2 3 3, CaO 33.7 H 2 12.4- ^ 

 is said to possess no reactions distinguishing it from other zeo- 



Menaccanite, LeucoxiteandTitanomorphite— A. Cathrein, 

 after a careful investigation of the titaniferous minerals of the 

 Northern Tyrol announces the following conclusions: — 



(1.) That apparently homogeneous menaccanite exhibits mi- 

 croscopical inclusions of rutiie, and that the excess of titanic 

 acid and the alteration of the normal ratio of Ti : Fe = I : 1 can 

 be demonstrated by analysis. 



>Proc. Min. Soc. Gt. Brifain. 

 »Z=its. f. Kryst, 1882, VI, 244. 



