IMPROVED VENTILATING FURNACE. Air Warming and Ventilating Warehouse. No. 23 Broad Street, Providence.
Providence: [1855]. 1st printing (presumed). Broadside, printed in black ink, 34 lines of text. Verso blank [except for 2 lines of mss]. 3 wood engraved views of the furnance. 10-3/4" x 9-1/4". Now housed in a clear archival mylar sleeve. "A central heating furnace was said to have been invented..... More