Turn the heating dial to a setting of about 40. This will
cause a rapid heating of your sample initially, but should
not cause it to melt. As the temperature increases, there
will be a decrease in the rate of heating. Since your
sample will melt above 200 ° C, you may need to periodically
increase the setting of the heating dial. Ideally, the
temperature increase at the melting point should be only 1-
2 ° C per minute