346 REPORT — 1875. 



he assigns to the fall of this stone (1810) appears to be that of another Irish 

 meteorite which fell at Mooresfort, Tipperary. The nickel-iron has the coru- 

 position : — 



Iron =85-120, Nickel = 14-27, Cobalt =0-602, Phosphorus = trace : total 99-997 ; 

 and the result of the treatment with acid : — 



SiOj, AljO, FeO MnO CaO MgO Na,© KjO PjO 



A. Soluble 42-91 2-35 16-93 6-28 5-34 2432 0-29 0-02 ..... = 98-42 



B. Insoluble... 59-48 3-24 7-94 8-84 4-62 13-17 1-86 030 trace = 99-45 



The mineralogical composition of the stone is stated to be : — 



Nickel-irou 1907 



Chromite 1-75 



Magaetic pyrites 6-54 



Soluble silicate 35-44 



luBoluble silicate 3707 



99-87 



The chromium oxide present as chromite is not mentioned at aU in the 

 above analysis. The iron sulphide is probably present as troilitc (iron mono- 

 sulphide mica, according to the older analysis). The greater part of the sul- 

 phur is in the part which is not attracted by the magnet. There the ratio is 

 given as Fe=3-92, S=2-04; the percentages for troilite, using the sulphur 

 as the basis for the calculation, would be re=3-57, S=2-04, and for mag- 

 netic pyrites Pe=3-12, S = 2-04. 



In a courteous letter received from the author he informs me that the 

 amount of vanadium present was too small to allow of a quantitative estima- 

 tion being made. He believes that in amount it is about half that met with 

 in the trap-rocks of Auvergne, which have recently been examined by him. 

 He is inclined to the belief that the vanadium is present as an oxide associated 

 with the chromite, " for we know vanadium occurs in terrestrial chrome-iron 

 in comparatively large quantities." 



1835, July 31st or August 1st. — Charlotte, Dickson Co., Tennessee*. 



The iron which is found disseminated in small particles throughout the 

 mass of many meteoric stones represents in miniature the huge blocks of me- 

 teoric iron that from time to time have been met with on many pauts of the 

 earth's surface, the record of the fall of which is unknown, their descent 

 having probably taken place at an epoch long anterior to that of their discoverj'. 

 AVhile the stones enclosing iron have not unfrequently been seen to fall, the 

 descent of purely metallic masses has been rarely witnessed. At present we 

 know of only the following few authentic cases : — Agram (1751), Braunau 

 (1847), Victoria West, S. Africa (1862), NidiguUam, Madras (1870), and 

 Marysville (1873). To these few instances is to be added the one heading 

 this notice, of which a brief account was published by Troost, of Nashville, 

 in 1845 f. The Tennessee iron fell from a cloudless sky, near several persons 

 who were working in the fields. A horse which was harnessed to a plough 

 close by took fright and ran round the field, dragging the plough with it. 



The iron has remained in the Troost Collection up to the present time, when 

 it passed into the hands of Dr. Laurence Smith. It is a kidney-shaped mass, 

 and has a bright surface like that of soft cast iron. When etched it exhibits 

 Widmannstattian figures in great perfection, and the author states that in this 



* J. L. Smith, ' Comptes Rendus,' 1875, vol. Ixxsi, p. 84, 

 t Amer. Jouru. Sc. vol, xUs. p. 336, 



