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A. DAIGGER & COMPANY, CHICAGO, U. S. A. 



2131a 



2133 



2133b 



2131a BURNER, Bunsen, adjustable, improved form, for coal or gasoline gas. 



Height, l /2 inches; diameter of tube Y* inch $1.25 



2131b BURNER, Bunsen, same as above, but with J^ inch I. P. male thread in- 

 stead of base. Height 6 inches 1.00 



2133 BURNER, Teclu's, small size, with air and gas regulator. Height 6 inches; 



diameter of tube Yz inch 1.75 



2133a BURNER, Teclu's, large size, giving a large and powerful flame, with regu- 

 lator for air and gas. Height, iy 2 inches; diameter of tube, 

 % inch 2.50 



2133b BURNER, with stop-cock and pilot light. The dotted lines show the small 

 tube for pilot light, which is on the inside of the burner tube. 

 Height, 6 inches; diameter of tube, l / 2 inch 1.75 



2133c 



2134 



2133c BURNER, Boekel's, for burning gases of various qualities. 



By turning the knurled part A, you can increase or lower the 

 flame, the flow of gas and air being regulated automatically, and 

 therefore the burner will always retain a blue flame. 



B is the set-screw by which to regulate the burner-tip C, sup- 

 plying more or less air, according to the quality of gas. The 

 supply of air is regulated by inserting the screw into the next 

 slot, either to the right or to the left. This is the best self- 

 adjusting Bunsen burner made, and we can recommend it to 

 give entire satisfaction. Height, 6 inches; diameter of tube, l / 2 

 inch 1.75 



2134 BURNER, Chaddock's, of porcelain; incorrodible; a new Bunsen Burner 

 especially designed for use in hoods where metal, on account of 

 the smoky flame, soon corrodes; also desirable for all laboratory 

 purposes, no retort stand and wire gauze being required. Com- 

 plete wilh support for dishes, chimney and three asbestos pads. . 2.50 



