Possible Clues:

• Temperature scale
• Scale getting hot in a fire then exploded
• F scale
• German whose name became known by degrees
• Physicist's in after explosion, storing hydrogen and helium separately
• Finer heath (anag.)
• Man of degrees?
• Measure of warmth fine hearth can produce
• Hot? Infer heat after converting to this
• In which one can express warmth of unusually fine hearth