Instrumentation

584 Archival description results for Instrumentation

68 results directly related Exclude narrower terms
IND-IIA-F199-I14 · Item · 26-11-1911
Part of Electrical Installations in Kodaikanal

This is a letter from the director of Kodaikanal and Madras Observatories to the executive engineer madura special division. It states that a small shed is required at a distance of about 600 feet from the engine house for protecting the pump that supplies water to the generating plant and the observatory.

Kodaikanal and Madras Observatories

The letter is from John Evershed, the Director of Kodaikanal and Madras Observatories, to the Executive Engineer Madura requesting for arranging for the painting of the front porch and woodwork of the office building and spectroheliograph building with chocolate paint before the dry weather ends.

Evershed, John
IND-IIA-F203-I04 · Item · 19-06-1919
Part of Letters related to Prisms

This letter from J. Evershed to the Director-General of Stores regarding the 30-degree prism ordered for Kodaikanal M6145 Hilger, which should not be sent out for trial as judged by Mr Shackleton, the prism does not meet the requirements of the specification and should be rejected.

Evershed, John

The letter is from John Evershed to the Director-General of Observatories, Simla, requesting the Government to sanction the estimate of Rs.1075 for a new pump and Rs. 340 for the alteration of the current pump house. He also stated that as the current pump is not working, the observatory building depends on rainwater, and during dry weather, it has to be carted from a distance; hence, at his request, the estimates were provided by the electrical engineer.

Evershed, John
IND-IIA-F217-I07 · Item · 26-11-1914
Part of Correspondence regarding meteorology during 1898 to 1925

The letter is from John Evershed to the Director-General of Observatories, Simla, enclosing the specifications for the mirror for the new spectroheliograph. It states that the H.Grubb, Cooke and Hilger quote £15 for a mirror of its size.

Evershed, John