1 68 Nolices and Extracls from Lite Minutes of the Geological Society. 



appear, in g-eneral, to be disposed nearly in a horizontal position^ where their 

 structure is at all visible ; but being- covered with soil and vegetation, this is 

 seldom the case. The stratum of limestone with nummulites is at the bottom 

 of a hill, which seems to rest upon it." 



7. Notice on Fuller's-earfh found in Chalk in Sussex. Bj/ F. Sargent, 



Esq. [Read June I, 1821.] 



On the northern side of the South Downs, near the village of Bepton, in the 

 neighbourhood of Midhurst, there occur two strata of fuller's-earth, which 

 intersect the upper chalk formation at a little distance from the summit of the 

 hill, in a nearly horizontal position, dipping a very little to the west. There 

 lies about one foot of chalk above them, and they are about three or four 

 inches in thickness. This substance bears all the characteristic marks of 

 fuller's-earth, being unctuous, transparent at the edges, and falling into a 

 powder when thrown into water. Underneath these strata, and towards the 

 middle of the hill, lies a stratum of chalk-marl, in a similar direction and of 

 equal thickness, which appears to contain the substance above mentioned. 



8. Notice on the Black Oxide of Manganese of Warwickshire. By S. Parkes, 

 Esq. F.L.s. M.G.s. &c. [I^cad June 15, 1821. J 



I AM induced to send the specimens which accompany this notice to the 

 Society, because they are of a very different character from any which I have 

 seen from Cornwall, Devonshire, or Scotland. I find also, by experiment, 

 that this manganese contains more oxygen than that which is usually pro- 

 cured from those districts. 



This, which I now send, was found at a place called Hartshill, near the 

 towns of Atherstone and Nuneaton, in the county of Warwick. The soil in 

 the neighbourhood is chiefly a red clay, and the manganese usually occurs in 

 detached pieces, distributed through the clay, weighing- from one pound to 

 fifty or sixty pounds each, and from one foot to six or eight feet below the 

 surface of the ground. 



It was in the year 1818 that I first heard of the oxide of manganese having- 

 been found in Warwickshire : and in the latter part of that year I made a 

 journey into that county for the purpose of searching out the mine, and learn 

 the following particulars : — 



