Instrumentation

584 Archival description results for Instrumentation

68 results directly related Exclude narrower terms
IND-IIA-F200-I17 · Item · 16-06-1922
Part of Correspondence regarding clocks of Kodaikanal Observatory

This is a letter from S. R. U. Savoor Deputy Director Madras Observatory to the Director General of Observatories Simla informing that there is no connection in practice between humidity of air and rate of Riefler clock as indicated by graphs.

Savoor, S. R. U.

The letter is from Solar Physics Observatory to P. N. Sankarakrishna Aiyar, Meteorological Observer, Periyakulam, informing about the closing of Periyakulam Observatory at the end of that month under the instructions of the Director General of Observatories and also the observer's services will be disposed at the end of a month from that day.

Kodaikanal and Madras Observatories

The letter is from the Superintending Engineer to the Director of Kodaikanal and Madras Observatories. It contains an estimate to be approved, countersigned, and submitted to the government for sanction. The estimate amounts to Rs.13600 for the construction of a building to house photospectroheliograph in Kodaikanal. Along with the estimates, the plans have also been forwarded.

Smith, Charles Michie

The letter is from Sydney Preston, secretary to the Government of India Department of Revenue Agriculture, to the secretary to the Government of Madras, Public Works Department. It informs about the sanction of the plans and estimates amounting to Rs.6380 for constructing a photoheliograph room with a dome at the Kodaikanal Observatory.

Kodaikanal Solar Observatory
IND-IIA-F217-I06 · Item · 28-10-1914
Part of Correspondence regarding meteorology during 1898 to 1925

The letter is from T. Cooke and Sons Ltd to John Evershed regarding a photo-visual lens. The photo-visual objective must not be correctly connected for spherical aberration. If the lens is returned and the abovementioned issue is there, they will fix it and pay for the carriage both ways.

Evershed, John
IND-IIA-F210-I14 · Item · 04-05-1909
Part of Correspondences related to Signaling Time from the year 1904 to 1923

This letter is from T. D. Berrington, Director General of Telegraphs, to the Director of Kodaikanal and Madras Observatories, Kodaikanal, regarding the inconvenience for the Alipore Observatory operating without regular time signals at 16 hours on Sunday and not object to discontinuing the service elsewhere.

Smith, Charles Michie

This is a letter from Assistant Director to T. Royds, executive engineer Madura Division regarding some repairs to the directors quarters. These repairs included repair of leak in drawing room,spare bedroom and skylight in corridor,rearrangement of displaced tiles and replacement of broken ones, replacement of broken chimney pots and repairs and renewals of guttering.

Royds, Thomas

This letter is from the Assistant Superintendent to the Deputy Director informing us that the instruments in the Marine office are still serviceable, but from some tests made, several coils appear to be short circuited. For this one new instrument is required and the cost for that is also enclosed with this letter.

Kodaikanal Solar Observatory