240 REPORT OF NATIONAL MUSEUM, 1884. 



samples were also taken for analysis, and the powdered material for 

 this purpose accompanies the hand specimens. The whole collection 

 comprises over 3,600 specimens. 



From the Permanent Exhibition at Philadelphia were received a very 

 extensive and valuable series of tests of the mechanical properties of 

 the Fagersta steel made by Kirkaldy, of London. This is by far the 

 most complete series of tests of steel ever made, and the records in 

 regard to the tests are full and complete, so that it is still a standard 

 of reference. 



A collection of the various ores of Colorado. 



A collection representing the mineral resources along the line of the 

 Little Rock and Fort Smith Railroad. 



Two interesting collections representing the manufacture of horse- 

 shoes by machinery, giving the various styles and sizes adapted for 

 different uses. One presented by the Burden Iron Company, Troy, 

 N. Y., the other by the Rhode Island Horseshoe Company, Providence, 

 R. I. 



A large collection of the different sizes and kinds of tacks. This col- 

 lection, while being very large, is not as systematic as we would like, 

 but the works have agreed to supply the deficiences and also to illus- 

 trate the process of manufacture, and when the collection is completed 

 it will form an interesting and attractive exhibit. Presented by the 

 Pennsylvania Tack Works, Norristown, Pa. 



A large collection of the various naturally occurring salts of Stass- 

 furt, Germany. 



From the Boston Exhibition were received collections representing 

 the mineral resources of San Salvador, Guatemala, and Venezuela. Pre- 

 sented by the respective commissioners. 



A collection of Ceylon graphite. Presented by Delmege, Reid & Co. 



A very large and complete series of graphite crucibles. Presented 

 by Gerbriider Bessel, of Dresden. 



In connection with the preparation for the New Orleans Exposition, 

 the curator has collected in person from the following localities : 



A series representing the refining of Arizona pig-copper as carried 

 on at the works of the Ausonia Brass and Copper Works, Ansonia, 

 Conn. 



A series representing the smelting of argentiferous lead ores at the 

 Horn Silver Works, Francklyn, Utah. 



A series representing the chloridizing roasting of base silver ores at 

 the Ontario Mill, Park City, Utah. 



A very large collection representing the copper and silver industry 

 at Butte, Mont. This collection embraces the copper and silver ores 

 of the region ; two collections representing the chloridizing roasting of 

 the ores from the Lexington and Moulton mines ; three collections rep- 

 resenting the smelting of the argentiferous copper ores from the Mon- 

 tana, Bell, and Parrot Works ; and a collection representing the smelt- 



