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Glass is far inferior to paper, plastic and Styrofoam in terms of insulation. Thermal conductivity in terms of BTU/(feet - hour - degrees F) is 1.82 for glass, 0.09 for paper, 0.06 for Styrofoam. The conductivity of plastics varies depending on the materials: for polypropylene and polycarbonate, the thermal conductivity values are 0.69 and 0.35, respectively.
ROLF, mho brings up the rear, is about twenty, with an open face and stiffish butter-coloured hair. As conductance is the reciprocal of resistance it is measured by the reciprocal ohm or mho. A conductor having a resistance of 100 ohms has a conductivity of .01 mho.