319 



the order in which -varioxis substances appear." He enumerates — 

 1. Chalk. 2. Sand. He notices green and red (our Green Sand 

 and Neocomian), and adds, " beneath these beds we find good clay 

 (our Kimeridge), and at Road over the red sand brick clay" (our 

 Gait.) 3. The superior Oolite (our Portland). 4. Calcareous grit. 

 5. Coral rag. 6. Kelloway rock, which he says may be readily 

 distinguished by its fossils. 7. Cornbrash. 8. Forest marble. 

 9. The great OoUte. 10. The inferior Oolite. He mentions a 

 " rock of no utility " between 9 and 10 (our Fuller's earth), and 

 adds, the inferior Oolite " reclines on calcareous sand, which is used 

 by our cooks at Bath to sand their kitchens." These sands have 

 since been the subject of a sustained controversy as to whether 

 they should be grouped as inferior oolite sands or upper lias sands. 

 Professor Phillips has recently proposed the term Midford sands, 

 ■which happily avoids expressing any opinion as to their relationship, 

 11. The Lyas. Both blue and white are mentioned. 12. Hed 

 ground. (Here the new red and pennant are confounded together.) 

 13. Coal and subjacent strata. "Such," he says, "is the usual 

 succession of strata, but in some places the intermediate beds are 

 wanting." The lithological character and economical uses of each 

 stratum are mentioned, together with the localities in the West of 

 England where they can be well seen. I have elsewhere drawn 

 attention to the fact that Townsend notices limestones and sand- 

 stones, and almost neglects clays ; while Smith regarded the clay 

 vales as well-marked physical features, and based on them his 

 natural divisions. 



The 2nd is " Succession of Strata in other Countries," pp. 108 

 to 122, which has already been alluded to as a compilation. 

 The main object of this is to show " that the regular succession is 

 from granite to sandstone, with argillaceous schists, and then to 

 coal and the calcareous rocks." 



The 3rd, "On the Thickness of the Strata," pp. 123 to 132. 

 In this is given the thickness of each formation in different 

 localities. 



The 4th, "Dip of the Strata," pp. 133 to 140. The dip 

 of the mountain limestone at Wick is given NW. 45°, but in aU 

 other cases the dip is described as so many feet in a mile. 



