390 
THE GEOLOGIST. 
Elements. 
Found. 
Not Eound. 
Calcium. 
Cadmium. 
Chlorine. 
Cobalt. 
Copper. 
Fluorine. 
Gold. 
Hydrogen. 
Iron. 
Lead. 
Silicium. 
Sulphur. 
Strontium. 
Silver. 
Scheelium. 
Titanium. 
Tin. ^ 
Uranium. 
Zinc. 
Molybderum. 
Nitrogen. 
Niobium. 
Osmium. 
Lanthanium. 
Lithium. 
Murcury. 
Glucium. 
Iridium. 
Iodine. 
Tantalum. 
Tellurium. 
Terbium. 
Thorium. 
Vanadium. 
Yttrium. 
Zirconium. 
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 dowTi 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 M'hen 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 sea shore from Whitstable to Hampton, 
near Heme Bay. A great many stones are here collected for the purpose of 
making cement. These stones are found in the clay, or they fall do^\'n 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 Algse are weU defined, and the smaller weeds are twisted 
about in all directions upon the surface of the stones. These latter, when they 
are in situ, 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 
Gbolochst." 
