MINERALOGT. 251 



tion to vanadinite ; and the chloro-molybdate might then be isomorphous 

 with the mimetite. The name of the new mineral is derived from 

 a\pi]^nTOS. F. W. R. 



Mallet, Prof. J. W. On Limonite with the Color and Translucency 

 of Gotbite. Amer. Journ. ser. 3, vol. ix. pp. 460, 461. 



Veins of a mineral having the blood-red colour of gothite, but the 

 chemical composition of limonite, were found running through ordinary 

 compact limonite from near Big Lick, lloanoke Co., Va. F. W. R. 



Marchese, Eug. Scoperta di minerali d'argento in Sardegno. [Silver- 

 ore in Sardinia.] Boll. R. Com. geol. Itah pp. 100-105 ; also, 

 Atti R. Ace. Lincei, ser. 2, t. ii. 



Note on a newly discovered vein, with native silver, argentite, &c., 

 intersecting the lead-veins worked in the Silurian schists. 



Maskelyne, Prof. N. S. On Andrewsite and Chalkosiderite. Journ. 



Chem. Soc. pp. 586-591 ; 2 figs. 

 Andrewsite is a Cornish mineral, described by the author in 1872. 

 It occurs in globular and occasionally discoid forms, with a radiated 

 structure. Its analysis by Dr. Flight leads to the formula : — 



2(2Fe,P,0,+Fe,HA)+CuH,0,._ 

 The spherules of Andrewsite often contain a yellowish-brown nucleus, 

 for which the following formula has been deduced : — 



Fe,Pp,-f-2Fe,H,03-fFeAOe. 

 Andrewsite is frequently associated with bright green crystals of a 

 mineral identified with CMlJcosiderite. The crystals are anorthic, and 

 present the following elements : — 



£ = 93° 30'; ,,=92° 59'; ^ = 107° 41'; a : 6 : c=l : 0-79097: 0-60478. 

 Crystals of Chalkosiderite form groups resembling the sheaf-like 

 clusters of stilbite. Original measurements of the crystals are given, 

 with a figure of their usual form and its projection. According to 

 analysis of the Cornish specimens the composition of chalkosiderite 

 may be thus expressed : — 



2Fe,P,0,-hFe2H,0,-hCuH,0, + 4H,0. F. W. R. 



. Lectures on the Morphology of Crystals, — at the Chemical 



Society. Chem. News, pp. 3, 4 ; 13-15 ; 24-26 ; 63, 64 ; 101- 

 103; 111,112; 121; 153-155; 200-202; 232; with woodcuts. 

 Also Nature, vol. xi. pp. 187-190. 



[Calcite.] Zeitsch. deutsch. geol. Oes. Bd. xxvii. Heft ii. p. 464. 



Note on a scalenohedron of Iceland spar, weighing 500 lbs. 



Moissenet, Prof. — , and Assistants. [Analysis of Talc from Bourg- 

 d'Oisans, Isere.] Rev. Geol. t. xii. p. 64. 



Mueller, Prof. Albr. Pseudomorphosen von Eisenzinkspath nach 

 Kicselzink. [Pseudomorph of Zinc- carbonate after Silicate.] 

 Verh. nat. Ges. Basel, Th. vi. pp. 274-27Q. 



From Altenberg, near Aik-ia-Chapelle. In some cavities the crystals 



