The earlier measurement instruments for temperature where called thermo scopes. He had a scale of 4 degrees warmth and 4 degrees of cold. One of the first who wanted to make a temperature scale was Galen (ca. The idea of measuring temperature exists a long time. This means that liquid, solid and gas phase from a matter appear at the same time. The triple point is a theoretical point where the three phases of a matter (for example water) come together.