Report of the President 65 



region north of North America and west of the 90th meridian 

 of West Longitude. 



Rearrangement of Collections. — The plans for the 

 rearrangement of the hall were put into active operation dur- 

 ing the year, and, with the assistance of Chester A. Reeds, 

 who assumed duties as Assistant Curator in the department 

 on 1 August, much progress has been made. It is now pro- 

 posed to devote the west half to historical geology and the 

 stratigraphic series of fossils, and a portion of the eastern half 

 of the hall to a typical biological series; the remainder of the 

 hall will be devoted to phenomenal and structural geology, 

 and space has been cleared in the northeast corner for the 

 reception of the Copper Queen Mine model which is being pre- 

 pared through the generosity of James Douglas. 



The reproduction of the Copper Queen Cave is almost 

 finished, and some excellent cave material has been received 

 from other regions, particularly a collection of Calcite and 

 Aragonite crystals from the El Potosi Mine of Chihuahua, 

 Mexico, as the gift of Grant B. Schley, and stalactites and 

 stalagmites from caves in Edmonton County, Ky. , as the gift 

 of the Mammoth Cave Estate. 



Other accessions worthy of particular mention are copper 

 ores and associated rocks from Butte, Mont., presented by the 

 Anaconda Copper Mining Co., a model of the Panama Canal 

 and a large number of meteorites. The latter came partly 

 through the acquisition by gift from J. Pierpont Morgan, Jr., 

 of the collections of meteorites left by the late Professor 

 Stratford C. H. Bailey, a noted collector of his day, and 

 through exchange or purchase. The total number of additions 

 to the exhibition series comprises representatives of 87 falls, 

 including about 14,000 specimens. The most noteworthy of 

 the falls are the specimen forming eight-tenths of the famous 

 Tomhannock Creek, N. Y., meteorite weighing 3^ pounds, 

 the 665-pound mass of the Amalia (Mukerop) iron, the 

 Shrewsbury (600 grams) aerolite and the series of 1,080 speci- 

 mens varying from 1/10 gram to 6,650 grams in weight of the 

 Holbrook, also an entire mass of the Cruz del Aire iron 

 weighing 15,082 grams. 



