Langley's Instrument for Measuring Radiant Energy
This page is the CodyCross answer for the clue below from African grasslands, Group 1541, Puzzle 3 (African Elephants).
Question is: Langley's Instrument for Measuring Radiant Energy
and the answer is: BOLOMETER
Word Meaning:
BOLOMETER — (physics) A sensitive device for detecting and measuring the energy of electromagnetic radiation.
Definitions from Wiktionary.