Mineralogical Notices. 21 



reduced to destitution. — Surely the long and able services of such a 

 man, in an institution supported by a Parliamentary grant, must 

 entitle him at least to compensation by a superannuation allowance. 

 To the value of those services, and to his great ability as a writer, 

 ample testimony has been given by the most eminent mathematici- 

 ans, Dr. Peacock, Professors Challis, King, Sir D.Brewster, Sir W. R. 

 Hamilton, Graves, Baden Powell, Sir J. W. Lubbock, Kelland, 

 Christie, and De Morgan, whilst the whole of his late colleagues in 

 the Academy, and all the clergy of Belfast have thus expressed their 

 sense of his moral worth : " Amidst all the difficulties surrounding 

 him as the head of a numerous young and therefore helj)less family, 

 we have reason to believe that his probity and correctness of conduct 

 have ever remained irreproachable, nor have we at any time heard 

 of the least moral taint attaching to his reputation. Under all these 

 circumstances we deeply sympathize with Mr. Young, and so, we 

 are satisfied, will the public in general." — Ed. Phil. Mag.] 



V. Mineralogical Notices. 



SCHORLAMITE2(3RO + i?Si03) + 3(2RO + Ti02). 

 BY M. RAMMELSBERG. 

 [Poggendorff's Annalen,vo\. Ixxvii. p. 123.] 



THE hardness and specific gravity of this mineral from 

 Magnet Cove, Hot Springs, County Arkansas, which 

 Rammelsberg procured from M. Krantz of Berlin, were found 

 to agree pretty well with the statements of Professor Shephard, 

 the first being 7 — 7|j the latter 3*783. The chemical reac- 

 tions however Rammelsberg found to differ considerably from 

 those described by Shephard. When heated alone the mi- 

 neral gave off" nothing volatile ; before the blowpipe in the 

 platinum forceps it fuses with difficulty at the edges into a black 

 mass ; the borax bead is yellow in the outer flame, and be- 

 comes colourless on cooling, unless a very large quantity of 

 the mineral has been dissolved ; in the inner flame it appears 

 green after treatment with tin. It likewise gives a yellow glass 

 with microcosmic salt in the outer flame, which becomes colour- 

 less still more readily ; treated with tin on charcoal in the inner 

 flame, it at last becomes distinctly violet. The finely pulverized 

 mineral is but imperfectly decomposed by hydrochloric acid. 

 On ignition in a closed platinum crucible, no alteration in 

 weight or colour results. Two analyses gave — 



I. 11. Oxygen. 



''f'Silicic acid . . 27*85 26*09'^ :>9i?3f.9T^- 13*55 



TTitanic acid . . 15*32 J 7*36 ... 6*74.^ 



"Protoxide of iron 23*75 



'i^Lime .... 32*01 



' Magnesia . . . 1*52 



100*45 98*95 



