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Archival description
IND-IIA-F040 · Fond · 1872

This item was an instrument used to measure time. A wire rope is wound around a drum which unwinds in a fixed time under gravity. A maker which moves horizontally, marks out the time elapsed on a linear scale. This instrument was used before the invention of the pendulum clock for Astronomical measurements at the Madras Observatory.

Eicheus
Letters related to Prisms
IND-IIA-F203 · Fond · 1910-1923

This fond is related to prisms from Kodaikanal Observatory

Kodaikanal Solar Observatory