This letter is from John Evershed to Mr Bhaskaran about the instructions to pack the 15-inch lens in a large case. He also mentioned that he had put castor oil between the component lenses to keep them perfectly adjusted and saved about 8 percent of light otherwise lost by reflection.
Strange, W. L.Astrophysics
1069 Archival description results for Astrophysics
This letter was a discussion regarding displacements of the solar lines towards red are distinctly unfavourable to Einsteins theory.
Evershed, JohnThis letter is a reply regarding the sun's entry into Aries from the Director of Kodaikanal and Madras Observatories to Pirojshaw H Daste. He states that the sun does not enter the constellation of Aries on March 21; it is called the sign of Aries on or about the date, and this entry coincides with the spring equinox. The date of entry into the constellation Aries slowly changes.
Daste, Pirojshaw H.This letter contains information about testing of the 15 inch lens on stars etc and finding something wrong in color correction.
Evershed, JohnThis letter was reply to letter dated Oct. 29 about lenses. He was requesting 15-inch, 12-inch, 4-inch and a lens of about 7 ft. focus lenses to be send from Nizamaiah Observatory to Kodaikanal Road Station mentioning the purposes for which it requires. In addition the item has the telegram messages written by Evershed to Pocock and vice versa.
Evershed, JohnThe letter discusses about the diagram on the article on Monthly Notices does not take account of the shift of the lines at the centre of the Sun's disc, but only the relative shifts between centre and limb.
Evershed, JohnThe letter was an enquiry with reference to the Photoheliograph which was received on loan from Greenwich Observatory, whether to return it or it may be completely dismantled and the parts used for other purposes in our research work.
Evershed, JohnThe letter is from John Evershed to The Director General of Observatories, Simla, stating that expenditure amounting to Rs.2500/- on reroofing the spectroheliograph building may be incurred in the year 1917-18.
Evershed, JohnThe letter is from John Evershed to The Director-General of Observatories forwarding a plan and revised estimate amounting to Rs.3540 requesting approval and return of the papers.
Evershed, JohnThe letter is from John Evershed to The Director General of Observatories, Simla, informing that he agreed to put off special repairs to the roof at a more favorable time as the price of materials is high and asked to do minor repairs that were necessary.
Evershed, John