312) Scientific Intelligence. [APRIL, 
the stockwerke at Geyer. St. Michael’s Mount, near Penzance, 
is a very remarkable mountain, which exhibits the relations of 
these stockwerkes in a striking manner, as the same veins pene- 
trate into both, and contain the very same minerals; namely, 
tinstone, apatite, copper pyrites, &c, 
«Similar veins, equally remarkable, occur at Conglure near 
St. Austle, and at Cliggepoint, not far from St. Agnes. At the 
latter place are some of the celebrated granite dikes, uncon- 
formable masses in killas, and without doubt of the same age 
with the rock in which they occur. Dartmoor is a desert and 
bare and almost uninhabited place, in which the most interesting 
thing which I observed is the Zinnseifen. The geological rela- 
tions of Cornwall are very simple, though for want of a sufficient 
number of accurate observations they have not yet been fully 
made out. My astonishment at the number, the richness, the 
extent, and the quality of the tin and copper veins, is not yet 
over. When I saw the first heap extracted from a vein, I con- 
ceived that it must have been obtained from a bed, and only 
satisfied myself by actual inspection that the ore was really 
extracted from a vein. 
«« An object, on which several geologists in England employ 
themselves in preference, is the study of the formations lying 
above the chalk. To see them, we went to the Isle of Wight. 
These newer formations are very remarkable. But the separa- 
tion of the fresh water formations from each other depends 
merely on the loose stones found in the different beds, and 
seems to be merely a conclusion which has been borrowed, 
perhaps, on too slight grounds from the French.” 
VII. Remarkable Mineral Spring in Java. 
Mr. Clarke Abel, in his ‘ Narrative of a Journey in the Inte- 
rior of China,” lately published, gives the following account of a 
mineral spring in Java, which I am induced to transcribe, 
though the account is unavoidably mcomplete, because the 
quantity of sulphuretted hydrogen gas which passes through 
the water seems much greater than has ever been observed in 
any other part of the world. 
“¢ These springs are in the midst ofa jungle on the right hand 
side of the road from Sirang to Batavia, and the country for 
many miles round is a perfect flat. On approaching them, I 
smelled the sulphureous gas, which they throw out in immense 
quantities. They are situated on a piece of barren ground, 
about 50 yards square, composed of a hard rock, which seemed 
to have been formed by deposition from the springs. In the 
midst of this space were several small pools of water in great 
commotion. They so exactly exhibited the appearance of boil- 
ing, that I immersed my hand in them with considerable caution, 
and scarcely credited my feeling when I found them of the 
temperature of the surrounding atmosphere. The central pool 
was the largest, having an area of eight or ten feet’ The water 
