Close by there was also a nephoscope for determining the motion of clouds.
"The Home of the Blizzard" by Douglas Mawson
In cloud work a nephoscope is essential.
"Wind and Weather" by Alexander McAdie
The nephoscope may be placed on a table, out of doors in fine weather, or close to a window from which the clouds to be observed can be seen.
"Practical Exercises in Elementary Meteorology" by Robert DeCourcy Ward