Abbe's Marine Nephoscope Inside View
The inside view of Abbe’s Marine Nephoscope used to measure the cloud’s direction and velocity on a boat. The rounded middle part of the nephoscope is the mirror with the compass is along the circumfrance.
Keywordsmirror, weather, meteorology, mirrors, Nephoscope, Cloud Movement Detecting Device, Abbe's Marine Nephoscope Inside View
Encyclopaedia Britannica (11th ed., vol. 18) (New York, NY: The Encyclopaedia Britannica Company, 1910)