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POPULAR SCIEXCE MONTHLY 



mentioned, twelve of which are dubious for want of precise dates. 

 From the remaining 677, I find 603 represented in his list, while the 

 great Vienna collection gives but 557, counted in the same manner. 

 The average weights are likewise highly satisfying, the total average, 

 viz: the whole weight of the collection divided by the number of local- 

 ities is over four kilograms (now 4,138 grams) for the locality." 

 This is the analysis of a technical expert, and might perhaps but 

 poorly reflect the impressions of one less solicitous about percentages 

 and exhaustiveness. The ocular view must be considered, the sensible 

 visual effect of interest and wonder. In this respect the Ward-Coonley 

 collection is eminently adequate to extort praise. It is now arranged 

 in seven beautiful cases at the north end of the Hall of Geology at the 

 American Museum of Natural History, and the specimens classified in 

 their three groups of iron (Siderite), iron and stone (Siderolite), and 

 stone (Aerolite), present their extended, yet thick and close ranges, 

 most effectively to the spectator. Superb polished slabs, etched and 

 developed, follow one another in the stepped series ; and the bewildering 

 number of aerolites, many large, and showing that invaluable and (to 

 the eye of the collector) most exquisite test of certainty, the dark glis- 

 tening crust of fusion, succeed, installed upon attractive mahogany 

 standards; while a supplemental section of casts, reveals the original 

 form and appearance of many celebrated or singular meteorites. 



One of the Seven Cases containing the Ward-Coonley Meteorite Collection, 

 American Museum of Natural History. 



