AND CLAYS. 



53 



' 11 



IV 



10 Inf. 





Proper], 



* Dr. W, 



* fossils 



IFi 



133. — Clay- — Gault (used for making bricks). Dinton 



Map 



Upper 

 Gallery. 



of 



8 



C.B. 



passage 



T" M " m clay beds. 



134. — Clay, Lower Lias, used extensively for makin 

 bricks and tiles. See "Memoir on the Geology of the 

 Country round Cheltenham " (sheet 44), by Edward Hull, 

 p. 15. — Stonehouse, Gloucestershire. 



Nos. 129 to 134 show a gradual passage from sandy into 



Wall-case 41 . 



(,I °gy of ,; 



Edward Hi 



i small 



gree: 



set. Map 1' 

 ; . — Hark 



F.R.S. 



Middle B. 



led "brot 



ed for buil 

 arlstoiH 



bari 



m m 



ireous 



trahedn 



fossil s0 



. Jfestco 



tk 



niicace* 

 s ; M 



9 



)• 



re 



o imp* 



Mm 



f 



135. — Pipe clay, used in the manufacture of china and 



'ds, south of Corfe 



earthenware. 

 Castle, Dorset, 



Messrs 



53,000 tons of this- clay were shipped from Poole in 1855 ; 

 of these, the finer kinds are used for making earthen and 

 stone ware, while the inferior qualities are used in the 

 manufacture of alum. Map 1 6. 



135a. — Pipe clay, from Lower Bagshot Beds, used for 

 making stone ware, blacking jars, &c. 



5b.— Pipe clay, from Lower Bagshot Beds, used for 

 making bricks, &c. 



I* 



3 



The following analyses of the pipe clay of Branksea Island, 

 by Professor Way, is extracted from a paper by J. Trimmer, 

 F.G.S., in the "Journal of the Royal Agricultural Society 

 of England," vol. xvi. part 1 : 



Silica - 

 Alumina 

 Oxides of iron 



White Clay. 



Black Clay 



65 



21 

 1 



Alkalies and alkaline earths 7 



Sulphate of lime 



4 



I 



100 



49 



28 



26 



25 



72 



00 



72 



•23 



23 



•25 



2 



•54 



1 



•78 



0' 



00 



99- 



80 



Branksea Island, Dorset Map 16. Presented by Col. Waugh. 



136— Pipe clay, with bright red ferruginous laminae ; 



from the Lower Bagshot Beds — Alum Bay, Isle of Wight. 



See Forbes's "Memoir on the Isle of Wmht " d. 139. 



