FOKEIGN COBRESPONDENCE. 



279 



per cent., a composition greatly analogous to that of the Kaba stone. 

 According to Prof Wohler's views the mineralogical composition of the 

 Tulbagh meteorite may be expressed by the formula : ferrugineo- 

 magnesian olivine, 84.32 ; indecomposable silicate, 5.46 ; sulphuret 

 of iron and nickel, 6.94; chromate of iron, 1.11; carbon, 1.67; 

 organic bituminous substance, and traces of copper, cobalt, and phos- 

 phorus. The first small specimens of the Tulbagh meteorite came 

 into the possession of the Vienna Imperial Museum through M. de 

 Struve, then resident Minister of Russia at Hamburgh ; subsequently 

 a fragment of 12 ^ ounces was purchased from Dr. Krauss ; and Sir 

 John Herschel himself presented the Museum with a specimen of 

 6^ ounces from the fragments sent to him by Mr. Maclear, the first 

 scientific observer of the phenomenon. 



The total bulk of the meteorite, partly shattered by its having 

 fallen on stony ground, has been estimated to exceed five cubic feet. 



2. — Tertiaries of Horn [Loiver Austria). 



These tertiaries, reposing on the crystalline rock-masses of the 

 Manhartsberg, have attracted Dr. Rolle's attention on account of 

 their fossil remains, w^hich partly indicate an age earlier than that 

 generally of the Vienna basin. They include, comparatively to the 

 other Vienna strata, a greater number of gasteropods, indicative of 

 the inferior tertiaries, with a smaller proportion of recent forms ; 

 so that they may justly be considered the most ancient of the 

 Vienna basin, those of Grund following immediately above them, 

 and the ascending series of marine deposits being closed by those near 

 Baden, Vos, Pau, &c. Dr. Rolle's observations afford a new proof of 

 the non-existence of any strictly determinable limit between the faunae 

 of the neogene (upper miocene and pliocene) and of the oligocene 

 and upper eocene deposits, overlying immediately the first, several 

 organic forms being common to both divisions, in the same way as 

 neogene species have continued to exist amid those of the present 

 creation. 



By Dr. T. L. Phipson, of Paris. 



Discovery of Selenium and Tellurium at Vesuvius — New Minerals 

 observed hy MM. Napoli and Palmieri — Metamorphism undergone 

 hy Eruptive Rocks — A few Facts connected with the Fhysical Geo- 

 graphy of the Hautes-Alpes. 



One of the most interesting discoveries that have been made for some 

 time past in mineralogy is the following, which we owe to M. Raphael 

 Napoli, professor of chemistry at Naples : — On examining the lava 

 which has been emitted almost constantly by Vesuvius for the last 



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