This is a reply letter to the Director from Gilbert Walker with reference to the previous letter. It was mentioned that the sunshine recorder should be firmly fixed so that it will not be accidentally thrown out of adjustment.

This is a reply letter to the previous one for agreeing to send the Dehra Zenith sector which is not in use so anytime they can send and this also mentioned no need to send a man for packaging

This is a reply letter to T. Royds stating the length and width of the morse tape required for chronograph

A thanksgiving letter to Simpson for the data of a) Black bulb for the year, b) minimum on rass for year, c) sunshine January to April

A Treatise on Spherical Astronomy by Robert Stawell Ball was a work on positional or spherical astronomy. It was first published in 1908. It has 506 pages.The book covers various areas of study, including fundamental formulae, determination of coordinates, atmospheric refraction, the theory of cartography, and more. It assumes a good level of geometry and trigonometry knowledge from readers.

This CD contains a video on the Kodaikanal's beautiful scenario, Kodaikanal Observatory, Telescope, and how the observations happened explained by scientists.

This letter was about the list of photographs of Sun taken on different dates and at particular times mentioned.

The atlas contains maps of different towns and provinces in Southern India in 1854. It has 134 pages.

The book An Elementary Treatise on the Integral Calculus by Benjamin Williamson. This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization. It was published in 1884.

The book "An Elementary Treatise on the Lunar Theory with a Brief Sketch of the History of the Problem" was written by Hugh Godfray. Hugh Godfray (c1821-1877) first published his treatise in 1853, a year after he graduated from St. John’s College. Lunar theory would become central to George Darwin’s work, and he went on to form crucial theories regarding lunar acceleration, earth retardation, the earth-moon system, and the genesis of the moon. It was published in 1987