258 THE AMERICAN MUSEUM JOURNAL 



Some of the duplicate material in the collections has been exchanged for 

 a 665-pound entire mass of the Amalia iron meteorite from Gibeon, German 

 Southwest Africa, and a polished and etched slice of another mass of the 

 same fall which shows exceptionally fine Widmanstatten lines, which are 

 strangely curved near the edges of the plate, besides a place where, appar- 

 ently, the mass broke and welded itself together again in the air, or more 

 probably two masses collided and welded into one. 



Other important accessions of meteorites, some of which have come 

 through purchase and others partly through purchase and partly through 

 exchange, are as follows: the entire mass (15,082 gpams) of the undescribed 

 Cruz del Aire siderite which was found December 24, 1911, near Sabinas 

 Hidalgo, Nuevo Leon, Mexico; a 570-gram slice of the Kingston siderite 

 from near Kingston, New Mexico; an 816-gram slice of the Casas Grandes 

 siderite from the prehistoric ruins at Casas Grandes, Chihuahua, Mexico; 

 a 116-gram slice of the Arizpe siderite from Sonora, Mexico; a 600-gram 

 slice of the Shrewsbury siderite from Shrewsbury, Pennsylvania; a 5420- 

 gram fragment of the Ahumada siderolite from x\humada, Chihuahua, 

 Mexico; a 532-gram fragment of the Admire siderolite from near Admire, 

 Kansas; an entire mass (122,000 grams) of the Estacado aerolite which fell 

 near Lubbock, Texas in 1880; a 650-gram polished slice of another fragment 

 of Estacado to show the internal structure; an entire bolide (650 grams) 

 of the Kansada, Ness County, Kansas, aerolite; a 370-gram slice of the 

 Lampa aerolite from the Desert of Atacama, Chile, a 455-gram slice of the 

 Cullison aerolite from Cullison, Pratt County, Kansas; and a large frag- 

 ment (12,250 grams) of the Long Island aerolite from Long Island, Phillips 

 County, Kansas. 



Most interesting of all perhaps from the popular point of view, is a 

 series of 1080 crusted fragments from a shower of aerolites that fell about 

 6: 30 p. M., July 19, 1912, near the flag station Aztec, six miles east of Hol- 

 brook, Arizona. These vary in weight from one-tenth gram (0.0035 of an 

 ounce), the smallest fragment found, to 6650 grams (14.65 pounds), which 

 is the largest fragment that has been found, and amount in all to 16,000 

 grams (35.2 pounds). The fall which will be known as Holbrook, comprises 

 more than 14,000 fragments, having a total weight of about 220 kilograms 

 (484 pounds) so that the Museum possesses about one-thirteenth of the 

 whole, as to both weight and number of fragments. The series is interest- 

 ing, not only from the variation of size represented, but also from the fact 

 that the masses show primary, secondary and tertiary crust, formed on the 

 meteorite as it pas.sed through the air and l)urst in successive explosions. 



