268 



CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 



No. 6386. 



No. 6390. (Shown with complete outfit 

 for use with gasoline.) 



FURNACES, MUFFLE, GAS HEATED 



6386. 



FURNACES, Muffle, for all work where exact temperatures are desired not exceeding the fusing 

 point of copper. May be operated with coal gas, natural gas, or gasoline gas without altera- 

 tion. Complete with muffle, dome, crucible tongs and 6 feet of chimney pipe and burner. 



No 3 4 5 6 



Inside muffle space, inches 3x4x2% 3%x5%x3 



Gas pipe and tap required, inches Ya % 



Height from table to top of lid, inches. . 16 19 J /2 



Dimensions of clay parts, inches 7%x7%x8 10x9x11 



Maximum gas consumption, cubic feet. . 72 96 



Net weight, pounds 60 88 



Each $20.00 26.00 



4%x6%x4 



1 1 



23 27% 



Il%xl0%xl4 14x15^x17% 



120 225 



145 225 



40.00 50.00 



6387. 



6388. 



6390. 



6394. 



EXTRA PLUMBAGO MUFFLES for No. 6386. 



For furnace, No 3 4 5 



Each 1.75 2.25 2.75 



EXTRA DOMES for No. 6386. 



For furnace, No 3 4 5 



Each . . 1.75 2.25 2.75 



6 

 3.25 



6 

 3.25 



FURNACE, Muffle, Braun's No. 20, for operation with gas or gasoline. Mounted on iron legs for 

 convenience in operation. Size of muffle space, 6x12x4 inches. Shipping weight, 140 pounds. 

 Complete with one muffle, hood, and two lengths of stove pipe, but without burner. If gasoline 

 is used, Gary Burner No. 2214A, 1% inch, is recommended; for gas, Vulcan Non-Blast Burner 

 No. 2146D should be used 23.00 



FURNACE, Combination Muffle and Crucible, Braun's No. 40, for gas or gasoline. The construc- 

 tion is such that the muffle is placed above the crucible compartment and the burner hole is so 

 located as to force the flame in rotary motion around both sides of crucible compartment. The 

 heat rising from the crucible chamber creates by suction a draft through the full length of the 

 muffle. The cover is made in two sections to facilitate removal. The muffle draft for cupel 

 work is obtained through a 1% inch opening in jacket and lining at rear, and the amount of 

 air admitted is controlled by a slide in the jacket. Dimensions of muffle space, 6x10x4 inches; 

 capacity of crucible chamber, 10 size F or 6 size G crucibles; shipping weight, 235 pounds. 

 Complete with one muffle, hood, two lengths of stove pipe, and covers, but without burner. Cary 

 Burner No. 2214B, 2 inch, is recommended for use with this furnace when burning gasoline or 

 Braun Blast Burner No. 2150 for use with gas 36.50 



