. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 22 BULLETIN 600, U. S. DEPARTMENT OF AGRICULTURE. THE ELECTRIC FURNACE. The inner case of the furnace is made of alundum on which is wound nichrome wire of diameter. The resistance of the furnace is 12 ohms. At the rear an alundum tube is inserted to lead off the volatile matter to a cooling cylinder of metal which is con-. nected to a bottle containing water and small pieces of pumice. The other opening of the bottle is connected with the suction. Asbestos wool forms the insulating material between the alun
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 22 BULLETIN 600, U. S. DEPARTMENT OF AGRICULTURE. THE ELECTRIC FURNACE. The inner case of the furnace is made of alundum on which is wound nichrome wire of diameter. The resistance of the furnace is 12 ohms. At the rear an alundum tube is inserted to lead off the volatile matter to a cooling cylinder of metal which is con-. nected to a bottle containing water and small pieces of pumice. The other opening of the bottle is connected with the suction. Asbestos wool forms the insulating material between the alundum case and the asbestos-board outer form. The door of the furnace is mounted with double hinge and weighted to remain open or closed, as Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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