NOTES ON THE GEOLOGY OF CLEVELAND. 



95 



works of Professor Phillips,* who has devoted much time and atten- 

 tion to the geology of this interesting district, which my observations 

 will, I think, abundantly prove to be one of great fascination to the 

 man of science, and of great importance in the national economy. 



Analysis of the Cleveland Ironstone (Pecten-Seam), by Prof. Percy. 



Protoxide of iron \ 39*92 



Peroxide of iron 3*60 



Alumina 7*86 



Lime 7*44 



Magnesia 3*82 



Silica 7-12 



Carbonic acid 22*85 



Other substances in small quantities 7*39 



100-00 



Metallic iron 33*62 



Analysis of Dark-Blue Magnetic Ironstone from Bosedale, by 

 W. Crowder, Esc/.-f 



Protoxide of iron 33*55 



Peroxide of iron 31*40 



Alumina 16*05 



Lime 2*35 



Magnesia 1*29 



Carbonic acid 10 26 



Silicic acid 4*50 



Water 1*34 



100*74 



Metallic iron 48*07 



Analysis of Commondale Limestone, by Prof. Henry. 



Carbonate of lime 44*8 



Silica 51*4 



Alumina and oxide of iron 2*6 



Water, &c 1*2 



100- 



* " Manual of Geology ;" " Geology of Yorkshire," part i. ; " Mountains and 

 Eivers of Yorkshire ;" " Oolites of Yorkshire," in Geol. Quart. Journ., vol. xiv. 

 f Edin. New Pkilos. Journ., Jan. 1857, p. 40. 



