250 J. V. Lewis and L. H. Bauer — Cyprine. 



Analyses of vesuvianite from Franklin, New Jersey. 



(A) . (B) (C) (D) 



Si0 2 32.42 8.70 35.14 36.41 



A1 2 3 14.07 20.86 17.35 



FeO 77 .77 1.86 



MnO 1.50 1.50 1.75 



ZnO 21.71 21.71 1.74 



CuO 99 1.47 1.48 



CaO 25.22 37.40 33.21 



MgO 1.08 1.60 1.38 



H 9 2.38 3.53 (— .24 



(+3.51 



Others .... 1.15 a 



100.14 32.68 100.00 100.08 



A. Vesuvianite-willemite mixture, apparently homogeneous. 

 L. H. Bauer, analyst. 



B. "Willemite calculated from A. 



C. Remainder of A, recalculated to 100 per cent. — approxi- 

 mately the composition of the vesuvianite. 



D. Steiger's analysis of vesuvianite from the Parker shaft. 

 Sp. gr. 3.451, carefully freed from specks of metallic copper. 



2. Rhodonite, var. Bustamite. — Pale pink in color; 

 elongated cleavable to coarsely fibrous in texture. Cal- 

 cium replaces manganese to a remarkable degree, as shown 

 by the analysis (E), by L. H. Bauer, with which is com- 

 pared (F) the mineral from Langban, Sweden, as given 

 by Dana (System of Mineralogy, p. 380) : 



Analyses of bustamite from Franklin, N. J. and Langban, 



Sweden. 



(E) (F) 



SiO, 46.72 47.66 



Al 2 6, 1.34 



FeO 46 .48 



MnO 26.51 31.65 



ZnO 1.34 



CaO 22.24 18.16 



MgO 1.27 1.18 



Others .98 b 



99.88 100.11 



aPbO tr.; Na 2 .44; K 2 .50; F .36; less = F .15. 

 bBaO .19; alkalis .27; gangue .52. 



