390 



THE GEOLOGIST. 



Elements. 



Pound. 



Not Found. 



Hydrogen, 

 Iron. 



Calcium. 



Cadmium, 



Chlorine. 



Cobalt. 



Copper. 



Fluorine. 



Gold. 



Silicium. 



Sulphur. 



Strontium. 



Silver. 



Scheelium. 



Titanium. 



Tin. 



Uranium. 

 Zinc. 



Glucium. 



Iridium. 



Iodine. 



Lanthanium. 



Lithium. 



Murcury. 



Molybderum. 



Nitrogen. 



Niobium. 



Osmium. 



Tantalum. 



Tellurium. 



Terbium. 



Thorium. 



Yanadium, 



Yttrium. 



Zirconium, 



Lead. 



This table shows clearly the great difference which exists between the che- 

 mical composition of the Erieberg veins and that of most rocks. Potash and 

 soda is completely wanting, and alumina is only met with in a very small quan- 

 tity.* Are we not justified in concluding, from this single fact, that their 

 mode of formation is not the same as that of the eruptive rocks, any more 

 than of the sedimentary or metamorphic rocks ? 



Singular Objects in Sand near Canterbury — -Mammalian Remains — 

 Submerged Trees, &c, at Herne Bay. — Dear Sir,— Curiosity led me yes- 

 terday into a sand-pit at Hackington, near this city, and I was struck with the 

 appearance which it presented. The weather has lately been very hot, but at 

 the time I was there it blew a brisk breeze, which occasioned the dry sand to 

 run down from above, as we sometimes see it run through an hour-glass. As 

 it trickled down, it left standing out clear from the face of the cliff numerous 

 small cylindrical bodies, varying from half an inch to an inch in diameter, their 

 surface covered with small protuberances or warts, and much resembling some 

 corals, but so fragile as hardly to bear handling. Their position was mostly 

 perpendicular, but some were lying horizontally, and they varied in length 

 from a few inches to two feet. The workmen said they were occasioned by the 

 wind, as they never observed them but when there was a strong breeze blow- 

 ing against the sand. This latter was of various colours, from a bright red to 

 a yellowish white, most probably caused by iron, as there are a great many 

 small masses of iron-stone mixed with the sand. Now I am at a loss to know 

 whether these objects owe their formation to iron in some of its combinations 

 acting upou the sand, or whether they have been corals which were covered 

 up by the sand when at the bottom of a shallow sea, and as the carbonate of 

 lime decomposed, its place was gradually supplied by the surrounding sand. 

 A stratum of brick-earth of about fourteen feet in thickness caps the sand, 

 which is worked out to about forty feet down to the water. 



A few days since I walked along the seashore from Whit stable to Hampton, 

 near Herne Bay. A great many stones are here collected for the purpose of 

 making cement. These stones are found in the clay, or they fall down as the 

 soil crumbles away from them, and strew the shore, whilst many of them have, 

 very curiously, the forms of Algae and other sea-weeds impressed upon them. 

 The stems of the Algae are well defined, and the smaller weeds are twisted 

 about in all directions upon the surface of the stones. These latter, when they 

 are mi stilt, are surrounded by an envelope of crystals of talc, very brittle, but 

 sparkling in lustre ; the covering is about three quarters of an inch thick. In 

 each stone there is a nucleus much like a fossil echinus, around which the 



* Compare the translator's papers on the Chemical Composition of Rocks in vol. ii. of the 

 " Geologist." 



