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IND-IIA-F003-I04 · Item · 17-02-1911
Part of Observation notes on earthquake records by Milne Seismograph

Letter from the Secretary of the Science Section of the Coronation Exhibition, 1911 of the Art, Industries and the Resources of the British Empire to the Director, Royds of the Madras Observatory regarding the suggestion of Prof. Milne, F.R.S that the director should be written to with a view of forwading the copies of any seismograms of earthquakes, photographs of the effects of the earthequake.

Royds, Thomas

This item was about the high resolution line sketch spectra captured by John evershed during his experiment at Kodaikanal Observatory. While experimenting, he came across to capturing the high resolution spectra of Altair, Nova Aquila, Arcturus in the observatory. In this sketch, he pictured the resolution spectra that he observed as Umbra for high resolution and Penumbra for low resolution.

Evershed, John