$ft Scientific Intelligence — Geology, 



IS. Mass of G?'ee7i Malachite of extraordinary size. — A few 

 months ago there was met with in the mines at Nischne-Tagilsk, 

 in liussia, a mass of green malachite measuring 16.2 French 

 feet in length, 7.5 French feet in breadth, and 8.6 French feet 

 in height, and weighing about 1300 Russian pounds. — Poggen- 

 dorfs Amialen, No. 1, 1836. 



13. The Coal Formation of the United States. — 1. Valuable 

 beds of bituminous or common black coal occur low down in 

 the carboniferous limestone, as well as in the higher accumula- 

 tion of the common coal-bearing measures. 2. Beds of lime- 

 stone, with marine animal remains, also occur in the true coal mea- 

 sures. 3. The great deposits of anthracite or glance-coal belong 

 not to the transition series, as formerly maintained, but to the 

 Goal-formation properly so called. 4. There is an alternating 

 series of red sandstones and red shales, crowded with productce 

 and crinoidal remains, and occasionally with caryophylleas, pec- 

 tens, and spiriferas, supporting productive coal-measures, and 

 resting upon a great body of mountain limestone, which lime- 

 stone rests upon old red sandstone. — Weaver in Lond. and Ed, 

 Phil Mag. Aug. 1886. 



14. Difference of Temperature hetxveen Granite and Slate in 

 the Cornish Mines. 



GRANITE. 



These observations were in all cases made on jetting and run- 

 ning streams of water, on their issuing from the unbroken rock ; 

 a mode which Mr Henwood thinks more likely to approach the 

 true temperature of the earth at and near the place of observa- 

 tion, than if the thermometers were inserted in holes bored in 



