Rules for Burning Coal in Small Domestic Furnaces Compiled from the Rules prepared by L. P. Breckenridge, for the Fuel Division of the American Society of Mechanical Engineers, Supplementary notes prepared by C. H. B. Hotchkiss, Assistant Professor Heating and Ventilating, Purdue University, Circular No. 9, vol. X, no. 5, Lafayette, Indiana: Engineering Extension Department, Purdue University, October 1926

Rules for Burning Coal in Small Domestic Furnaces Compiled from the Rules prepared by L. P. Breckenridge, for the Fuel Division of the American Society of Mechanical Engineers, Supplementary notes prepared by C. H. B. Hotchkiss, Assistant Professor Heating and Ventilating, Purdue University, Circular No. 9, vol. X, no. 5, Lafayette, Indiana: Engineering Extension Department, Purdue University, October 1926, MSF 181, Item 1, Communal Collections Box: 24, Placement: 15, Folder: 1. Charles H. B. Hotchkiss papers, MSF 181. Purdue University Archives and Special Collections. https://archives.lib.purdue.edu/repositories/2/archival_objects/5287 Accessed April 30, 2025.