﻿G. F. Kunz — Meteoric Iron from New Mexico. 311 

 Si0 2 : A1 2 3 : :RO:H 2 



Garnet = 3 : 1-05 : : 2'88 



Decomp. product = 4 : 1*84 ::6'25:5'08 



The garnet ratios agree closely with the theoretical. The 

 ratios of the alteration product agree closely with Groth's for- 

 mula for aphrosiderite. It is higher in protoxides and water 

 than the Lake Superior specimens, but it may be the same 

 compound mixed with ripidolite, which would account for this 

 increase. No microscopic section of this decomposed product 

 was made. Some of the larger scales showed, in convergent 

 light, the dark cross and interference figure of a uniaxial crys- 

 tal. The color of the aphrosiderite is light green, much lighter 

 than that from the Lake Superior locality. 



The changes which have previously been noted in garnet 

 differ from ours, in that they have been the alteration of pyrope 

 (magnesia garnet) into ripidolite or serpentine-like magnesia 

 silicates. 



Mineralogical Laboratory, Sheffield Scientific School, New Haven, May 18, 1886. 



Art. XXXYI. — Further notes on the Meteoric Iron from Olorieia 

 ML, New Mexico; by George F. Kunz. With Plates V to 

 VII* 



Since the publication of the article on the three masses of 

 meteoric iron from Glorieta Mt.,f New Mexico, Mr. J. H. 

 Bullock has very kindly furnished me with the information 

 wanting; it has been found impossible to communicate with 

 Mr. Charles Sponsler. During the month of August, 1885, 

 Mr. Bullock thoroughly examined and dug over the ground, 

 working about six weeks steadily, and was rewarded by find- 

 ing three more masses of the Glorieta meteorite (Nos. 4, 5, 6). 

 In the meantime a Mexican had also found a small piece (mak- 

 ing seven fragments thus far obtained), but it disappeared before 

 Mr. Bullock could secure it. Mr. Bullock states that the pieces 

 found by Mr. Sponsler were discovered while he was prospect- 

 ing during the month of August, 1884, on the ranch of Mrs. 

 Eoival, near Canoncito, Sante Fe Co., N. M., five miles from 

 the summit of Glorieta Mt. 



No. 4 weighs 1*204 kilos (2*65 lbs.). One-third of the sur- 

 face shows the disruption, as in No. 2, the other parts being 

 unaffected and showing the crust surface. The broken surface 

 is partially drawn out toward the part that was torn off from it, 



* By a mistake of the binder, plate YII was inserted in the September number, 

 f This Journal, III, xxx, 235. 



Am. Jour. Sci.— Third Series, Vol. XXXII, No. 190.— October, 1886. 

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