JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



TPIE ARTS. 



APRIL, 1810. 



A mineralogical Outline of the District containing the Alumi-' 

 nous Schist7is, in the County of York, with the entire 

 Process practised in the Manufactory of Alum : to which 

 is added an Analysis of the Sulphate of Alumine, and the 

 Super sulphate of Alumine and Potash, with practical Ob- 

 servations and Remarks: communicated by Mr, Richard ^ 

 Winter. 



JL HE stratvm of aiuniihous schistus bordering upon the strata 

 sea, presents cliffs "that are in general precipitous. Their 

 height is from 100 to 750 feet. 



The sea has made, and is continually making considerable t^^^ encroach- 

 incroachments upon the land, particularly to the southward ingon theni» 

 of Whitby. The abbey, built in the year 656, was situate 

 near one mile from the sea ; at present the distance is not 

 200 yards. 



This wasting of the cliffs is principally occasioned by the Owing to de- 

 decomposition of the schistus from exposure to the atmos- composition, 

 phere, and the subsequent action of the wind, rain, and 

 breakers of the ocean. In walking under the perpendicu- 

 lar parts of the cliffs considerable danger is to be appre- 

 hended from the fragments of stones &c. continually falling 

 down. Several instances have occurred of a very unfortunate 



Vol. XXV. No, 114.— Apeil 1810, R nature^ 



