272 



Scientific Intelligence. 



that of Bohumilitz. In the outer crust, there are pieces of schreibersite 

 and protosulphuret of iron. The Widmannstadtian figures are large. 

 G. — 7*737. Composition of this and the Bohumilitz irons: 



Fe Ni Co Ph Schreibersite 



1. 92-757 5-693 0-791 0-862 0-277 = 100-380 



2. Bohumilitz, 92-173 5 667 0-235 1 625 = 1U0, Berzelius. 



2. Meteoric Iron of Cape of Good Hope. — Analyses by Uricoechea and 

 Booking (Ann. Ch. u. Pharm., xcvi, 246) : — 



Fe Ni Co Ph Cu, Zn, S 



1. Uricoechea, 81-20 15 09 2 56 0 09 trace Schreibersite, 0 95=99-89 



2. Booking, 81 30 15 23 201 0 88 trace " 0-88=99 50 



3. Meteoric Stone of Mezb-Madaras in Siebenburg. — Analysis by F. 

 Wohler (Ann. Ch. u. Pharm., xcvi, 251) '.—Native iron 18*10, nickel 1-45, 

 cobalt 0*05, graphite 0-25, magnesia 23 83, Fe 4 61, Mn 0-28, £1 3-15, Ca 180, 

 Na 2-34, K 0*50, sulphur, phosphorus, and oxyd of chrome undetermined, 

 silica 43-64=100. Separating 19-6 p. c. of nickeliferous iron, the rest 

 was subjected to muriatic acid. The insoluble part and soluble part gave : 



Si M Mg Fe Ca Na K Graphite 



l Tr^i„ki 0 S 18 *502 0-564 4-660 4-643 0 929 0-585 0-347 0-250=30480 



lns01UDle ' }r n 100 parts, 60-70 1-85 15-29 15 25 3-05 1-91 1-13 0 82 =100 



0 o nlnK u S 26-336 2-586 19 170 0870 1-755 0 153=50-920 



° 1 m ' I In 100 parts, 5184 5 08 37-64 1 70 3-44 0-30 =100 



The author concludes that the stone consists of olivine, augite, labrador- 

 ite, with nickeliferous iron, sulphuret of iron, graphite, and a small pro- 

 portion of chromic iron. 



The meteorite fell on the 4th of September, 1852. 



4. On the Volcanoes of Southern Italy ; by M. C. St. Claire Deville 

 (L'Institut, No. 1173). — M. Deville has prepared a report on his two 

 journeys to the volcanic region of southern Italy. In connection with 

 MM. Leblanc and Lewy, he has analyzed the gases and specimens col- 

 lected by him, and the following are some of the results. 



The gas of the fumaroles which he calls dry fumaroles, and of those 

 that usually afford alkaline anhydrous chlorids with some sulphates, is 

 pure air deprived of a very small proportion of oxygen. The gas analyzed 

 was collected at Vesuvius in May, June, September and October, 1855. 



The gas collected in September, 1855, from one of the fumaroles of the 

 crater over the small central plain, from which vapor of water with sul- 

 phur and sulphuretted hydrogen were issuing, afforded, one specimen, 

 3*51 p. c. of carbonic acid ; another 9*26 p. c. The rest was pure atmos- 

 pheric air, or air deprived of its oxygen. 



Two specimens of gas collected on the 5th and 22nd of October from 

 the Lake Naftia in Sicily gave for the first, Oxygen 17*36, nitrogen 82' 64 ; 

 the second, oxygen 15*77, nitrogen 79-23, carbonic acid 5*00, showing 

 the variations in the gaseous emanations. 



The white mineral of the Vesuvian lava of recent eruptions is probably 

 leucite, it having the specific gravity 2-48, and the oxygen ratio for the 

 bases and silica 3 : 8*2. But it differs from the leucite of Somma in 

 containing more potash, the oxygen ratio of the soda and potash being 



1 : 2-09 in this mineral from the lava of 1855, and in the Somma (Fossa 

 Grande) leucite 1 : 821. Moreover in the crystals from the lava of 1847, 

 as he learns from M. Damour, this ratio is 1 : 1*67. 



