BY HENRY G. STOKES, F.G.S. 13 



The powdered uiineral ou charcoal when moistened with 

 co.b|alt .soJution gives the visual reaction for alumina. From 

 repeated tests the colour of the mineral appears to be due to the 

 presence of vanadium. 



A quantitive analysis by Mr. EdL;ar Hall, F.C.S., Albert 

 Street, ijives the following result : — 



ino-03 



From the above analysis it appears that this mineral is a 

 Hydrous Phosphate of Alumina with a formula approximating 

 to 4 Al.^ (}., . 5 P.^O- + 18 H^O. It i^ distinguished by several 

 cjiaracters from the Aluminium Phosphates described by 

 " Dana," but somewhat resenibles turquoise. The specimens 

 received from the Keppel Rocks possessed a hardness of .5 to 

 5-5, and were susceptible of a high polish. 



m THE DPtOUGHT-PtESISTIXd PROPERTIES OF THE 

 EUCALYPTI. 



By JOSEPH LAUTERER, M.D. 



[■Head bt'foir tlw Itni/nl Sorirt;/ m' Qturmlaml, IQt.h Sept., 1892.] 



