128 eepobt — 1879. 



in potash solution should be determined, and in as nearly parallel ex- 

 periments as it was possible to devise, it was found that of tridymite from 

 Siebenbiirgen 49"63 parts, and of asmanite from Rittersgriin 43 - 88 parts 

 were dissolved. 



The bronzite, the most prominent of the non-metallic minerals, has 

 been obtained in a pure form with comparative ease. It is but slightly 

 affected by the blowpipe, and is not acted upon by acids with the excep- 

 tion of hydrogen fluoride. Its specific gravity is 3 - 310. It possesses the 

 following composition 



98-44 99-83 98-90 



No trace of olivine was met with in this material. 



Heated in vacuo the substance of the meteorite lost 0'23 per cent, of 

 the weight, and the gas evolved took fire, but was so small in quantity 

 that it could not be further examined. The meteorite possesses tbe 

 ' crust of fusion ' in a fully developed form ; it is of about the same 

 thickness as a sheet of paper, and close under it are found the mixture of 

 the minerals troilite, asmanite, and bronzite, of an unaltered light brown 

 colour, although they turn deep black when raised to a temperature 

 slightly above that at which lead melts. The author's pages conclude 

 with some considerations on the probable temperatures of meteorites in 

 their passage through our atmosphere. 



Meteorite from TiescMtz, in Moldavia, July 15, 1878. 1.45 p.m. 1 



A stone fell at this date with the usual accompanying noise within 100 

 paces of some people whose attention was directed by a child four years 

 of age to a small dark cloud, from which a peculiar and increasing noise 

 proceeded. This cloud was suddenly seen to become incandescent, but in 

 no very high degree, and the noise became still more intense when a body 

 was seen to fall from the cloud. The stone was warm when found. The 

 noise was heard about the neighbourhood 2 miles around. The stone was 

 secured and sent on the 19th to the Museum of the Technical High 

 School, of Briinn. The meteor appears to have passed over Daubrawic 

 and Sloup, and the path to have been directed from azimuth 108, alti- 

 tude 40°, or from an apparent radiant in R.A. 68°, N. declination 40°. 



One stone only was found, and all search for other specimens of the 

 fall were in vain. The stone weighs 27'5 kilogrammes, and has the form 

 of an irregular pyramid with an almost square base. 



The entire surface is covered with a black crust, in places of about 

 the thickness of that covering the stones which fell at Pultusk ; on the 

 large convex side, which is called the ' breast-side,' it is much thinner, 

 and exhibits a radiated character. On the back it is thicker and rougher, 



1 Denkschnfte der math. Naturn-issenschaft.en-Classe, Ahad. der WissenscJiaften. 

 Wien. xxxix. November 21, 1878. 



