Reversing, table surface melting

Table 2 lists the surface tension, its temperature coefficient, polarity, and Macleod s exponent for amorphous surfaces. The surface tension for crystalline surface may be calculated from the amorphous value by using the Macleod s exponent. All data were obtained by direct reversible measurements in the melt. The values for the solid were obtained by extrapolation fi-om the melts. These are the most reliable and preferred. On the other hand, some values were obtained by the contact angle method. These are denoted with the symbol (c). The two values usually agree well. 

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