SCIENTIFIC NEWS. 



The great limestone and the MMl faults (of Mr. Farey's 

 Report, Vol. I. pp. 280 and 290,) are represented by a broad 

 red line with black dots on it. 



The turnpike roads are represented by small elevated lines ; 

 and the towns and villages, by small round elevations. 



Printed labels are affixed to the several towns, villages, roads, 

 hills, valleys, strata, mineral veins, caverns, &c. 



The superficial scale of this model is one inch and a quarter 

 to a mile. The scale for heights and depths necessarily exceeds 

 the other, in order to give every lnil and valley as nearly as 

 •possible the appearance that it had on the spots, where the carv- 

 ing was the greater part of it executed. 



The colours are painted in oil, so as to be permanent, and 

 admit of the model being cleaned from dust, &c. ; and the 

 whole is inclosed in a strong deal box, 20 inches long (from N 

 to S,) 19 inches wide (from E to W,) and three inches deep, 

 with a lid which takes off" when the model is in use, and on the 

 under side of which this description may be pasted and pre- 

 served. 



For more readily understanding the internal parts of the 

 district represented in the model, it should be observed, that the 

 limestone-stone shale (reddish brown^ occupies all the borders 

 of the model, (but sometimes with first grit and coal shale upon 

 it,) except for about six inches near its bottom, or S. end, between 

 Sheen-Hill and Hartle-Moor : that this scale has an easy dip, or 

 declines gently on the W. N. and E. sides, in those several direc- 

 tions, or with an easy rise towards the limestone and toadstone 

 districts, whose strata have a general and rather a rapid dip 

 towards the E. The four limestone rocks, coloured grey white, 

 green, grey blue, and ochre y ellow , dip successively under the 

 eastern shale, and each other, in this order : and the three toad- 

 stones, coloured dark blue, bright yellow, and red, dip also to 

 the E. between the limestone rocks. 



The coloured patches and rings will point out the several 

 hummocks and denndated patches of strata, that are detached 

 from the masses or surfaces of the seven strata of limestone 

 and toadstone which are mentioned above. 



Mr. Hall's own examination of the strata of the considerable 

 district comprised in his model was separately conducted, and 

 afterwards compared with Mr. Farey's report and manuscript 



map j 



227 



