| Answer | Crossword Clue |
|---|---|
| myograph | instrument for recording the contractions and relaxations of muscles |
| heliographs | instrument for recording the duration and intensity of sunshine |
| heliograph | instrument for recording the duration and intensity of sunshine |
| telemeters | An apparatus for recording the readings of an instrument and transmitting them by radio |
| telemeter | An apparatus for recording the readings of an instrument and transmitting them by radio |
| plethysmograph | An instrument for recording and measuring variation in the volume of a part of the body, esp. as caused by changes in blood pressure |
| plethysmographs | An instrument for recording and measuring variation in the volume of a part of the body, esp. as caused by changes in blood pressure |
