> 
ee 
Mineralogy and Geology. 433 
with 0-3 of niobic acid, zirconia, oxyd of cerium and yttria98'8, It 
comes from the zircon-syenite of Frederiksvirn, Norway, along with 
eleolite, black mica, violet-blue fluor and magnetic iron. 
Sunadin, or glassy feldspar.—Naumann recognizes this as a dis- 
tinct species (Min. 3d edit., p. 800). It is monoclinic like orthoclase ; 
but the angle of the rhombic prism is 119° 13', and the inclination of 
the axis 68° 55! (65° 47! in orthoclase). Formula same as for ortho- 
_ but often contains lime and magnesia. Common in trachyte and 
onolite. 
Montmorillonite.—This name is given by Salvetat to a species near 
Halloysite, analyzed by Damour, from Montmorillon, Department of 
Vie Formula Ai Sit+ 6H. 
On Scleretinite, a new Fossil Resin, from the coal measures of Wi- 
gan, England; by J. W. Mauuer, (Phil. Mag. [4], 4, 261.)—Occurs 
imsmall drops or tears from the size of a pea to that of a hazel-nut. 
Brittle, with the fracture chonchoidal. Translucent in thin splinters. 
olor black, but by transmitted light reddish brown; streak cinnamon- 
town. Lustre between vitreous and resinous, rather brilliant. G= 
1136. H.=3. Heated on platinum foil it swells up, burns like pitch, 
Position :— 
Carbon. Hydrogen. Oxygen. Ash. 
1. 7674 8°86 10°72 ~ 868 
2. 7715 9-05 10°12 3°68 
affording the ratio C1°H?O=carbon 77°05, hydrogen 8-99, oxygen | 
10°28, ash 3-68. Taking the number of atoms of carbon at 40, which 
exists in so many resins, the formula becomes C*#°H?28O#, It is near- 
€st in composition to amber, which contains C*°H®?04. 
(3.) Described Species. 
Diamond.—The diamond has been found in the Australian gold 
region. 
, Misenite, a hydrous sulphate of potash from Misene, Phlegraan 
fields ; A. Scaveai, aceeananaiehe sulla Campania, Mem. ili, 
v, 54 
and occurs in silky fibres of a dirt 
heated and gives she water. Compost — 
8 k #1 H 
56-93 36:57 0-38 612 
qT ime or saleratus occur near the Sweet- 
water Rivel, Heke” pig tic cale with sulphate of soda and reat 
Tid of sodium. Three grammes of the salt in dry powder afforded 
Stoonp Sens, Vol. XV, No. 45.—May, 1853. Ste: scdepalls sd 
