Patent Low-Pressure, Self-Regulating,
STEAM-HEATING APPARATUS,
INCLUDING
SHEET IRON RADIATORS AND
RAPID CIRCULATING TUBE BOILERS.
Patented May 11, 1880.—R. Oct. 24, 1882.—V. Jan. 30, 1883.—R. Jan. 30, 1883.—B.
HOBBS, GORDON & CO., PROPRIETORS,
SOLE MANUFACTURERS OF
THE CONCORD SUSPENDED RADIAL DRILL,