268 REPORT OF NATIONAL MUSEUM, 1884. 



Pottsvflle shops, and Mr. William Waters, superinteudeDt of the Shen- 

 andoah district. Si)ecial acknowledgments are due to Mr. E. W. Kear, 

 secretary of the Arnoux Electric Light and Heat Company, of Pennsyl- 

 vania, who furnished the dynamo, wire, and other material used in Ko- 

 hinoor colliery, at his own expense. 



Thanks are also due Maj. Jed. Hotchkiss and Mr. M. Erskine Miller, 

 Mr. Albert Blair, Mr. J. R. Werth, superintendent of the Bright 

 Hope Kailroad Company, of Virginia; Mr. F. Howald, superintendent 

 of the Fire Creek Coal and Coke Company; Capt. W. R. Johnson, 

 jjroprietor, and Mr. Thomas A. Bartlam, superintendent of the Coal 

 Valley Coal Comjjany ; Mr. G. C. Hewitt, general manager of the Wini- 

 frede Coal Company ; Mr. N. M. Jenkin, of Stone Clift'; and Mr. J. C. 

 W. Tomkins, president of the Cedar Grove mine, for assistance in the 

 Virginia and West Virginia coal fields. 



The collection embraces 300 objects, all of which have been duly cat- 

 alogued and numbered. 



Alloys. — One of the most interesting uses to which metals are put is 

 the manufacture of alloys for different purposes. This subject had not 

 been at all represented in the i)revious collections, but a beginning has 

 now been made which is capable of being greatly extended. The manu- 

 facture of brass at Ansonia, Conn., has already been mentioned. The 

 manufacture of type metal is very fully represented by a collection 

 presented by Mackellar, Smiths & Jordan, of Philadelphia, Pa. This 

 collection shows the various metals entering into the manufacture of 

 type metal and type material and the different grades of type used lor 

 different purposes. To these are added illustrations of the steps in the 

 progress of casting type, together with illustrations of some of the older 

 methods. The manufacture of Babbitt, or anti-friction metal, is illus- 

 trated by collections presented by Messrs. Merchant & Co., and Paul 

 S. Reeves, of Philadelphia. These both include samples of the metals 

 used in the manufacture and samples of the various grades of Babbitt. 

 Messrs. Merchant & Co. also presented an interesting series of solders 

 of different composition for different purposes. The manufacture of a 

 special metal for bearings, &c., is illustrated by a collection from the 

 Ajax Metal Company, of Philadelphia, Pa. 



N^on metallic ores. — The manufacture of emery cloth and sandpaper 

 is very fully illustrated by a collection presented by Baeder, Adamson 

 & Co., Philadelphia. This collection shows the quartz and emery as 

 mined, as ground and sorted in various sizes for making the paper, and 

 also illustrates the extraction of the glue and the manufacture of the 

 paper used. To these are added samples of the various sizes of emery 

 cloth and sand-pa^jer as put upon the market. 



The occurrence and application of asbestos are very fully illustrated 

 by a collection presented by the H. W. Johns Company, ]Sew York. 

 This includes samples of asbestos froom fifty-five different localities, 

 and is by far the most thorough and complete illustration of the occur- 



