A Private Collection
Preserving the Beauty and Function of Historical Weather Instruments
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Latest news
A precision eight-inch mine surveying aneroid by C. F. Casella & Co. Ltd., London, made around 1950, has been added to the collection. Built for barometric levelling underground, it reads to 0.01 inHg and combines a deep convex beryllium bronze capsule, a full-disc anti-parallax mirror and a movable reading lens.
