NOTES ON THE GEOLOGY OF CLEVELAND. 
95 
works of Professor Phillips,* wlio 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 tJie Cleveland Iro7istone (Feden-Seam), hy 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 Darh-Blue Magnetic Ir on stone from Bosedale, hy 
W. Croioder, Esq.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 Limiestone, hy Prof. Henry. 
Carbonate of lime 44*8 
Silica 51*4 
Alumina and oxide of iron 2*6 
Water, &c 1*2 
100- 
* " Manual of Geolof^y ;" " Geology of Yorkshire," part i. ; " Mountains and 
Eivers of Yorkshire ;" " Oolites of Yorkshire," in Geol. Quart. Joum., vol. xiv. 
t Edin. New Philos. Journ., Jan. 1857, p. 40. 
