Scientific Intelligence — Geology and Mineralogy. 203 



scalded to death. Its falling into the sea was accompanied with tre- 

 mendous hissings, and detonations like constant discharges of heavy ar. 

 tillery, distinctly heard at Hilo, twenty minutes distant. — Yours, &c. 



D. H. Storer. 



4. Jamesonite, — From Las-Parets, (Ann. des Mines 3«™e ser. xviii.) 

 — An interesting locality of this mineral has been lately discovered be- 

 tween Milhau and Seveiac-le-Chateau. The surrounding rock is a 

 yellow, granular, distinctly stratified limestone, abounding in mag- 

 nesia, and traversed by many veins of heavy spar. The Jamesonite 

 occurs in drusy cavities, either in a pure state or mixed with heavy spar. 

 It afforded, on being analysed, the following ingredients : — viz. 

 lead, 48.8 — copper, 6.6 — antimony, 1 '^.'i — sulphur and loss 27-4 = 

 100.0. 



5. Ci-ysiallized Gold. — On examining many crystals of gold, from the 

 gold washings of Catharinenberg, Mr Avdeeff obtained the same results 

 as those of G. Rose in his analysis of the rolled masses of gold of the 

 Urals, viz., that the gold in veins and seifenwerken, whether massive 

 or crystallized, is combined with silver in indeterminate proportions, 

 and that both substances are isomeric. According to Avdeeff, the 

 crystals of gold in rhombohedral dodecaliedrons contain much more 

 gold than those which occur in tetrahedral and octahedral crystals. Is 

 there a determinate limit to the amount of gold and silver according to 

 which crystals take on this or that form ? — Leonhard and Bronn'9 

 Jahrbuch, 6 Heft, 1841. 



6. On the Composition of the Asbestus of Scharsenstein in the Ziller 

 Thai in the Tyrol. — Meitzendorff has lately given, in Poggendorff 's 

 Annals, an analysis of this variety of asbestus, which is characterized 

 by the length of its fibres and by its white colour. 100 parts contairt — 



Oxygen. 



Silicic acid, 55,869 29.023 



Magnesia, 20.334 7.870 ^ 



Lime, 17.764 4.989 I ..^^^ 



P»rotoxide of iron, 4.309 0.981 r^*"^" 



Protoxide of manganese, 1.115 0.250 J 



99.391 

 As the silicic acid contains almost exactly twice as much oxygen as 

 the bases do, the following may be regarded as tke formula :-— 



Mg' 



\ Si» 



Mn« 



