372 Foreign Literature and Science. 
Francis de Paul, which is muueing at Naples, from the de- 
sign of the architect Bianch 
5. Dasarity of Gas for Caloric.—J. H. Mallet, secretary 
of the Academy of Lyons, has published experiments, very 
judiciously contrived, upon one of the most important prob- 
lems of 2m Bae the constitution of mixed gasses, and 
ity for Caloric. He thinks he has shown that at 
the same temperature the particles of different gasses are at 
equal distances, that their molecules have different volumes, 
and that the quantity of caloric which a gas can admit de- 
are upon the extent of the space which separates the mo- 
ules. 
6. Natural History.—M. Adolphus oe has discov- 
ered in the ponds of the forest of Fontainbleau, a new crus- 
tacea which he has named limnadia, A which i is remarka- 
ble by its size. It appears to form a very distinct species. 
All the individuals which Mr. B. has remarked, to the num- 
ber ofa thousand, had ees eeee their backs. He has not 
yet been able to account for this striking peculiarity. 
7. Dolcoath Mine —The magnificent copper mine of 
Doleoath in Cornwall, employs under ground 750 persons, 
consumes monthly 3000 Ibs. of gunpowder and 5000 Ibs. of 
candles. It is 1400 feet deep, and contains within it 
7,000,000 of cubic feet of excavated space. The pumps 
ring, up daily from this mine 120,000 cubic feet of water. 
8. Heat of the Earth.—It appears from the statements of 
an Forbes and R. W. Fox, of oy ae berg the tempera- 
mines in that country increases progressively 
dino one degree for every 60 or 70 feet “of | descent. The 
‘maximum temperature of the deepest mines (1300 to 1400 
feet,) is about 80 degrees of Fahrenheit, or 28 degrees 
above the mean climate of the country. 
9. Test for Burytes and Strontian.—These earths may 
; be readily Make's sola from each other by the 
_ be, either by nitric, muriatic, or some other acid, which will 
form a soluble salt ‘with it ; add solution of pent of soda 
