simplest method of measuring a melting point is by use of an oil bath (1).
A round bottomed flask is partly filled with a mineral oil and the capillary
tube containing the sample is attached to a thermometer with a rubber band.
The oil is carefully heated with a microburner. The heated block apparatus
(2) can be found in many shapes and sizes but the principle is the same;
the sample is heated placed in an electrically heated block and the observations
are made through a magnified port. The 'hot-stage' apparatus (3) allows
the observer to look at the sample through a microscope while its temperature