£28 SCIENTIFIC NEWS. 



map ; and every spot, wherein any difference of the two surveys 

 appeared, has been visited again and again ; all the old and best- 

 informed miners have been consulted, and by repeated corres- 

 pondence, and the liberal and ready communications of Mr. 

 Farey, he considers himself as warranted to present his models, 

 as faithful representations of the numerous and highly curious 

 phenomena which the High Peak presents j any of which he is 

 ready to explain minutely on the spots, and, in other respects 

 to assist the investigations of curious travellers who may be anxious 

 to examine and verify these facts, and wish to engage his perso- 

 nal assistance for such pujpose. It is also a part of Mr. Hall's 

 professional business to make and label ample specimens of all 

 the various mineral productions of the Peak Hundreds ; care- 

 fully noting their precise localities, and their places in the strata 

 or veins (a species of information too rarely met with, even in 

 the best mineral collections.) He always keeps a large collec- 

 tion of the Derbyshire minerals, for sale, collected almost entire- 

 ly by himself. 



Mr. Farey, from a desire to promote mineral science, and to 

 serve Mr. Hall, has consented to keep some of his models, at 

 his house, No. 12, Upper Crown street, Westminster, London, 

 for inspection, and sale, at eight guineas each. They may also 

 be had, on these terms, of Mr. Hall himself, as above, or by 

 application to him by letter. 



Mr. Bakewell will commence a coarse of geological lectures 

 in March, at Willis's rooms, King-street, St. James's, designed 

 to illustrate the geology and mineralogy of England, and particu- 

 larly intended to direct the attention of landed proprietors to the 

 neglected mineral treasures on their own estates. Mr. Bake- 

 well also intends shortly to publish, in 1 Vol. 8vo. a work 

 entitled Outlines of Geology, with observations on the Geology 

 of England. 



Speaking 



