Phosphoric acid . . .310 



Protoxide of iron . . .096 . 



Alumine 090 * 



Water, bitumen, & carbo- 

 nic acid . 



120 



Natural Hidory. 413 



" The specimen of the phosphate of lime of Fins gave by analysis 

 Lime . . . .3'JS 



Phos. of lime . . .670 



Carbonate of iron . .157 

 Alumine . . .090 



Water and bitumen .060 



.977 

 .979 

 Heated in a crucible lined with charcoal, it fused into a compact 

 mass, opaque, stony, covered on its surface with grains of a brittle 

 metallic substance. Fused with half its weight of borax, it pro- 

 duced a vitreous enamel- like scoria, and very brittle grains, almost 

 unacted upon by the magnet." 



A note by JVI. Guilleman on the same substance, describes it as 

 occurring in globular nodules, sometimes flattened, and generally 

 of small size. They are found in abundance in the black argil- 

 laceous schists ; they are not homogeneous, but are enveloped in 

 carbonate of iron ; sometimes they are internally divided by 

 laminae of carbonate of lime or of coal : at other times they are 

 enveloped in a zone of compact sulphuret of iron. In the centre 

 is a dirty yellow, or gray nucleus, compact, finely granular, and 

 traversed by graminous impressions ; it is this nucleus which 

 contains the phosphate of lime. One specimen of sp. gr. 2.65 was 

 composed of phosphate of lime . . . 0.S63 

 carbonate of iron . . . 0. 1 1 7 



alumine 0.006 



coal, water and loss . . .0.01-1 



1.000 

 but the proportions vary in different specimens. — Ann. des Mines, 

 xi. 143. 



12. Geology of the Severn. — The Rev. C. P. N. Wilton, 

 F.C.P.S., <5fc, has lately been engaged in making a geological 

 survey of the shores of the Severn, in that part of its course which 

 passes through the parish of Clure, in Gloucestershire, to an ex- 

 tent of about 7 miles. In this examination several interesting 

 discoveries were made, of which detailed accounts will shortly be 

 laid before the public. 



In one place a stratum was found of a sort of carbonized wood, 

 much resembling Bovey coal, in which occurred, disseminated in 

 small pieces, a white substance not hitherto met with in that 

 matrix, and which, upon examination by Mr. Brande, was found 

 to be sulphate of barytes. 



A fossil species of alcyonium was met with in blue lias. A cir- 

 cumstance regarded as extremely curious, when mentioned to that 



Vol. XX. 2 F 



