| Answer | Crossword Clue |
|---|---|
| radiophone | an instrument for producing sound by radiant energy |
| radiophones | RADIOPHONE, an instrument for producing sound by radiant energy |
| bolograph | a record made by a bolometer, an instrument for measuring radiant energy |
| bolometry | measurement by a bolometer, an instrument for measuring radiant energy or infrared light |
| bolographs | BOLOGRAPH, a record made by a bolometer, an instrument for measuring radiant energy |
| bolometries | BOLOMETRY, measurement by a bolometer, an instrument for measuring radiant energy or infrared light |
