Br. Walter Flight — History of Meteorites. 591 



The silicates, separated by the action of acid and sodium carbonate, 



consist of : 



Si0 2 A1 2 3 FeO 1 MgO CaO K 2 Na 2 



A. Soluble 37-16 0-27 26-54 30-18 2-43 2-14 1-28 = 100-00 



B. Insoluble... 56-35 5-93 11-22 19-58 3-97 I'll 1-84 = 100-00 

 The soluble portion is olivine, having the composition (Mg § Fe £) 2 



Si0 4 : it is identical with that which, according to Damours's analy- 

 sis, constitutes the meteorite of Chassigny (1815, October 3rd), and 

 occurs as one of the ingredients of so many meteorites. In the 

 insoluble portion the ratio of the oxygen of the silicic acid to that 

 of the total bases is 2 : 1. Von Baumhauer points to a resemblance 

 between these ingredients and those forming the insoluble portion 

 of the meteorites of Chantonnay, Seres, and Blansko, analysed by 

 Berzelins, as well as that of the Utrecht stone, which he himself 

 examined. He considered it (the insoluble part) to be in that case 

 a mixture of albite and augite ; Bammelsberg, on the other hand, 

 held that it consisted either of labradorite and hornblende, or 

 oligoclase and augite ; a considerable proportion may be bronzite. 



On the last page of Boguslawski's translation of Schiaparelli's 

 Note e Riflessioni sulla teoria astronomica delle Stelle cadenti is an 

 interesting mathematical demonstration that the meteorites of Knya- 

 hinya and Pultusk (1868, January 30th) cannot have come to us 

 from the same part of space. 



1866, December 6th.— Cangas de Onis, Asturias, Spain. 2 



In Meunier's interesting paper a drawing is given of this curious 

 stone, which he selects as one exhibiting peculiarities of brecciated 

 structure and the relation of meteoric rocks to each other as regards 

 stratification. The stone contains abundance of fragments of a white 

 ingredient enclosed in a darker material ; the white portions he finds 

 to be identical with the rock forming the meteorite of Montrejeau 

 (1858, December 9th), while the duller substance, cementing them 

 together, is the same as that constituting the stone which fell at 

 Ad are, in Ireland (1813, September 10th). He terms these two 

 rock varieties : montresite and limerickite. Meunier gives November 

 30th as the date of the fall of this meteorite. 



According to a very incomplete notice of Luanco's paper, which 

 has reached me, one of these stones weighs 11 kilog,, and the chief 

 constituents appear to be silicic acid, magnesia, and lime, with 38-8 

 per cent, of iron and 1 per cent, of nickel. As, however, the pro- 

 portion of iron present as nickel-iron and as protoxide is not stated, 

 no calculation with a view to determining its proximate composition 

 can be attempted. 



Found 1866.— Sierra de Deesa, near Santiago, Chili. 3 



Meunier has studied the two fragments of this iron preserved in 

 the Paris Collection, and finds it to possess characters of which a 



1 With traces of manganese protoxide. 



2 S. Meunier. Les Pierres qui tombent du Ciel. La Nature, 1873, i. 403. — 

 J. It. Luanco. Ann. Soc. Espan. Hist. Nat., iii. part i. 



3 S. Meunier. Cosmos, 1869, vii. (v. ?), 188, 552, 579 and 612. Sitzber. Ak. 



