226 SCIENTIFIC NKW3. 



attend at the meeting, and each hanJs up to the chairman a 

 note or ticket, containing the price per ton which he is dis- 

 posed to give j the chairman then reads aloud the various offers, 

 and the highest bidder is declared the purchaser. 



Models of all the most Interesting Parts of the High Peak of 

 Derbyshire. > 



Mr. ELI AS HALL, Fossilist and P elref action- Worker , of 

 Castleton, near Tideswell, in Derbyshire, has announced, that 

 since the mineral survey of the county of Derby was undertaken 

 for the board of agriculture, by Mr. John Farey, sen. and 

 particularly since the publication of the first volume of his 

 " Report on Derbyshire" by the Board -, Mr. H. has assiduously 

 applied himself to an examination of all the mineral limestone 

 district and its vicinity, to the northward of Winster and 

 Hartington, and to the carving out and completing of a model 

 of its curious and rugged surface, under the patronage of his 

 Grace the present Duke of Devomhire 3 and the Right Hon. 

 Sir Joseph Banks, Bart. 



On exact casts from this model he has contrived (as on Mr. 

 Farey's mineral Maps) to represent, by colours, the eleven 

 lowest of his principal rocks and strata of this district 5 viz. 

 3, fourth limestone {ochre yellow); — 2, third toadstone (red) ; — 

 3, third limestone (grey blue) ;-— 4, second toadstone (bright 

 yellow) j — 5, second limes' one (green) 5 — 6, first toadstone 

 (very dark blue) ; — 7, first limestone (grey white) j — 8, lime- 

 stone shale (reddish brown) ;— (), first or millstone grit (yellow) ; 

 — 10, first coal shale (dark brown) -, — and 11, second grit rock 

 (dark broivn). — These several colours being painted on a fillet, 

 in their proper order, by the side of actual specimens taken from 

 the eleven rocks and strata above mentioned, are arranged and 

 fixed on the E. side of the model, interspersed with other speci- 

 mens of the chert, black marble, shale-freestone, coals, entrochi, 

 &c. which belong to such strata. 



Besides which, the ranges of all the principal mineral veins 

 are represented, on the model, by blue lines for rake veins -, and 

 broad blue lines with yellow dots on them, for pipe veins ; and 

 specimens of lead ore in each limestone rock are given. 



The 



