THREE MODELS OF HEATING AND COOLING DEVICES, the first, a heating drum. Patent No. 102053, Patentee Charles W. Servos, Chicago, IL, Patent Filed March 11, 1870, Patented April 19, 1870, constructed of tin; the second, a milk cooler, constructed of tin (Patent office label missing); the third, a food warmer, constructed of tin (Patent office label missing)--12in. high, 4½in. high, 6½in. high (3)