History of Science Museum: Collection Database Search


Vendor's Description

Tesseract catalogue description:

POCKET NEPHOSCOPE, probably English, early 20th century. Contained in a 3-3/4" diameter domed case, the nephoscope has black and silvered mirrors, each with 16 point compass directionals. Condition is fine. A simple but very rare device, for the measurement of wind direction based on the motions of cloud images.

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