Scientific hUelligence. — Geology. 



•was given to this branch of industry in Baden, and the harvest 

 has become still more productive. 



iMo6. LigfUning Tubes. — In the vicinity of the old castle of 

 Rcmstein, near Blenhenburg, which stands on a picturesque 

 series of rocks, belonging to the greensand or quadersand stone 

 formation, in a loarn land, there have been found, this sum- 

 mer, very firm and long vitreous tubes (Bliterohren). From a 

 branch in the upper part, two branches go off, some of which are 

 ten feet long, and from these proceed three small branches. — 

 Literary Gazette, January 15. 1831. ifXiOiuv sit to i^s&iij 



7. Temperature of some Mines in Cornwall.- — The follow- 

 ing interesting observations were made by Robert Were Fox, 

 Esq. of Falmouth, and communicated to the Royal Geological 

 Society of Cornwall : — At Tingtang copper-mine, in the parish 

 of Gwennap, at the bottom of the engine- shaft, which is in Kil- 

 las (clayslate), and 178 fathoms deep, the water, two months 

 ago, was at the temperature of 82°. In 1820, when the shaft 

 was 105 fathoms deep, the temperature of the water was 68°; 

 thus an increase of 14° has been observed in sinking 73 fathoms, 

 which is equal to 1° in 5 fathoms. At Huel Vor tin-mine, near 

 Helston, the water was 69°, at the bottom of a shaft 139 fa- 

 thoms deep, in the year 1819. It is now 209 fathoms deep, 

 and the temperature is 79, which gives an increase of 1° in sink- 

 ing 7 fathoms. This part of the mine is in Killas. The high- 

 est temperature of the water, at the bottom of Poldice copper 

 and tin mine, in the parish of Gwennap, in 1820, which was 

 then 144 fathoms under the surface, was 80°. It is now 176 

 fathoms deep, and the temperature is 99° ; and, in a cross level, 

 20 fathoms further north, the water is 100". The two last 

 mentioned temperatures are the highest hitherto observed in any 

 of the mines of Cornwall ; and the increase is equal to 19° in 

 one case, and 20° in another, in sinking 32 fathoms, or 1° for 

 1| fathom. Three persons only were employed at the time 

 near each of these stations, and the water pumped up from this 

 part of the mine was estimated at 1,800,000 gallons in twenty- 

 four hours ; and it was found to contain a considerable quan- 

 tity of common salt in solution. 



8. Volcano in New Z^a/«wc?.— Accompanying a specimen of 



