| Such a horizontal mirror, adapted to measure the direction of motion of clouds, is known as a nephoscope. |
| The directions of movement of clouds are determined by means of the nephoscope. |
| The nephoscope is an instrument used in determining the directions of movement of clouds. |
| Close by there was also a nephoscope for determining the motion of clouds. |
| If nephoscope observations are made, the monthly summary may include the mean direction of cloud movement for each month. |
| At many of the86 more important stations the movements of clouds are observed with a nephoscope. |
