“…2, 34, 41, 44, 57, 58, 72, 89, 97, 120 22,46,51,53,63,71,74,83,89,94,97,100,103,104,105,111,119,123,124,126,127,128,139,151,152 Orientation of Heating Surface 18,19,21,28,29,37,41,42,46,57,58,70,75,84,89,98,109,124,125,138,146,147,153 Surveys of Previous Work…”