This letter is from W. G. Butler to the Director General of Observatories enquiring the details of the focal length, etc of a single lens, 4" aperture for Kodaikanal Observatory
Butler, W. G.Telescope
92 Archival description results for Telescope
A letter from the Director to the Director General of Observatories stating that the cheaper of the two classes of wedges offered by Hilger is quite good enough for the purpose for which they were required
Kodaikanal and Madras ObservatoriesA letter from the Director stating the change in focal length of the lens in question is not likely to be found seriously objectionable, if the lens proves satisfactory in other respects
Kodaikanal and Madras ObservatoriesThis Letter is from the Director of Kodaikanal and Madras Observatories to the Director General of Stores regrading the details of the lens mentioned in Annual indent
Kodaikanal and Madras ObservatoriesLetter from the Director of Kodaikanal and Madras Observatories to the Director General of Observatories regarding sending the lens details via mail. The specifications of the new lens are enclosed in this letter.
Kodaikanal and Madras ObservatoriesThis letter is from the Director of Kodaikanal and Madras Observatories regarding specifications for new grating for Solar Physics Observatory, Kodaikanal
Evershed, JohnIn this letter, the Deputy Traffic Manager mentioned that Thomas Royds can send the telescope by wagon by unbroken gauge route if he wishes, with proper packing. And also asked to advice the District Traffic Superintendent to make necessary arrangements to send the wagon through over the South Indian railway.
Royds, ThomasThe 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, JohnThe letter was informing about Dr.Walker has written to the Minister of Finance asking about some spare lenses that they have with a view in borrowing them for use in Kasmir. It informs Evershed the type of lens that could be borrowed till the time.
Evershed, JohnThe letter is from Adam Hilger Ltd to John Evershed, Director of Solar Physics Observatory Kodaikanal. It replies that the three 60° flint prisms are in stock but unfinished. Also, the two-plane parallel glass and the pair of green glass will be sent together to absorb the violet and ultra-violet rays. It also discusses the lack of immediate possibility for finishing the 6" diameter object glass.
Evershed, John