SURVEYING
A sunshine recorder,
Details
A sunshine recorder,
by Casella London, the 4-inch diameter glass sphere mounted on the brass recording arc, with graduated scale and maker's label, the stand with three adjustment screws -- 9in. (23cm.) high, (sphere chipped)
See Illustration
by Casella London, the 4-inch diameter glass sphere mounted on the brass recording arc, with graduated scale and maker's label, the stand with three adjustment screws -- 9in. (23cm.) high, (sphere chipped)
See Illustration