198 



BULLETIN 12, UNITED STATES NATIONAL MUSEUM. 



(11) Clock brass, a movement put together. (54391.) 



(12) Spinning brass. (54377.) 



(13) Cartridge metal, showing different stages in the production of the cartridge, 

 and tests to prove the quality of the metal. (54373.) 



(14) Tubing, composition, four parts copper to one part zinc. (54388.) 



(15) Rich gold metal, showing the bar as cast, and the reduction of the same bar 

 by rolling. (54375.) 



(16) Rich gold spinning metal, spun to shape without annealing. (.54387.) 



(17) Rich gold metal tubing. (54389.) 



(18) Brass solder, used for brazing richer brasses and copper. Composition, one 

 part copper to one of zinc, No. 0. (54379.) 



(19) Brass solder, No. 1. (54380.) 

 (54381.) 

 (54382. ) 

 (54383.) 

 (54381.) 

 (54385. ) 



(25) Brass rods, for wire-drawiug; shows a bar cast one-half inch by one-quarter 

 inch, reduced, first by rolling and theu drawing down, to one-eighth inch diameter. 

 (54392.) 



(26) Brass wire, fine. (.54.397.) 



(27) Brass wire, with a thread cut in it for making " cabled wire shoe-pegs." 

 (51212.) 



(28) Dies, for wire-drawing. (.54374.) 



A series of alloys manufactured by Messrs. Mercbant & Company, of 

 Pbiladelpbia, includes a full series of Babbitt metals, solders, and a few 

 other commercial alloys. 



BdbMtt or antifriction metals. 



(20) Brass solder. No. 2. 



(21) Brass solder, No. 3. 



(22) Brass solder, No. 4. 



(23) Brass solder. No. 5. 



(24) Brass solder. No. 6. 



(1) Genuine or copper hardening. 



(54455.) 



(2) Genuine or copper hardening, show- 



ing fracture. (.54449.) 



(3) Grade A. (54450.) 



(4) Grade A, showing fracture. (54444.) 



(5) Grade B. (54451.) 



((i) Grade B, showing fracture. (54445.) 



(7) Grade C. (.54452.) 



(8) Grade C, showing fracture. (.54446.) 



(9) Grade D. (54453.) 



(10) Grade D, showing fracture. (54447.) 



(11) Grade E. (54454.) 



(12) Grade E, showing fracture. (54448. ) 



Solder. 



(1) Composition, 40 parts tin, 60 parts lead. (54456.; 



(2) Composition, 80 parts tin, 100 parts load. (.54457.) 



(3) Composition, 90 parts tin, 100 parts lead. (.54458. ) 



(4) M. F. Composition, 106 parts tin, 100 parts lead. (54459.) 



(5) Half and half, composition 100 parts tin, 100 parts lead. (54461.) 



(6) Capping, composition, 100 parts tin, 100 parts lead. (54462.) 



(7) Triangular, composition, 80 parts tin, 100 parts lead. (.54463.) 



(8) Plumbers extra wiping, composition, 105 parts tiu, 200 parts lead. (54465.) 



(9) Plumbers extra wiping, composition 125 parts tin, 200 parts lead. (54466 ) 



(1) Stereotype metal. (54472.) 



(2) Bolster metal. Used for filling cutlery handles, etc. (54473.) 



(3) Copper. Used in the manufacture of alloys. (54476.) 



(4) Tin. Used in the manufacture of alloys. (54460.) 



(5) Antimony. Used in the manufacture of alloys. (54478.) 



(6) Lead. Used in the manufacture of alloys. (54464.) 



(7) Zinc. Used in the manufacture of alloys. (54477.) 



