This patent is courtesy of the late, great Joe Szakacs. Joe loved anything Bryant. He told us that this is the first boiler Bryant ever manufactured. He also told us that he had worked on many of these. He would periodically clean the horizontal tube passages as rust would collect. This unit has independent burner cocks, and the 1913 Pattison Supply catalog says it will heat with just one burner tube on. Joe said that this statement is true. Here's to one great old-timer finding another. Rest in peace, Joe.