The letter is from C. V. Ramam, Raman Research Institute to M. K. Vainu Bappu, Nizamiah Observatory asking about using telescope mirrors made of cast aluminium and about diffraction grating as a preliminary to building solar observatory.

The fond contains Results of observations of the fixed stars made with the Meridian Circle at the Government Observatory , Madras

This fond includes instrumental corrections implemented from 1883 to 1887. Additionally, it features distinct outcomes of observations and average positions of stars during the years 1883 to 1887. Furthermore, the fond contains a distribution list of Madras astronomical publications.

This map is published under the supervision of the Society for the Diffusion of Useful Knowledge. Baldwin & Cradock 47 Paternoster issued the map on September 1, 1833 which depicted India from Bundelkand to Khandeish and Berar.

This item was an instrument used to measure time. A wire rope is wound around a drum which unwinds in a fixed time under gravity. A maker which moves horizontally, marks out the time elapsed on a linear scale. This instrument was used before the invention of the pendulum clock for Astronomical measurements at the Madras Observatory.

The book "Numerical Lunar Theory" was written by ?Sir George Biddell Airy. It was published in ?1886. The book focuses on lunar theory, specifically the mathematical and numerical calculations involved in understanding the ?moon's motion and its relationship with the Earth and other celestial bodies. It covers gravitational forces, orbital calculations, and the effects of perturbations on the moon's motion. It was 178 pages long.

The book was edited by ?Richard Taylor in 1841. It has 618 pages. The book contains various scientific topics and research findings. It is one of the volumes in a series of books published by Richard Taylor between ?1837 and ?1852. The series, titled "Scientific Memoirs," was a compilation of selected works from foreign academies of science and learned societies.

The Recent Progress of Astronomy: Especially in the United States was a book by Elias Loomis and published in 1856. It was about the history of astronomy, providing valuable information about the advancements and discoveries in the field during the early nineteenth century. It has 502 pages.

This fond encompasses a diverse array, including Indian Marine Surveys, Trigonometrical Surveys, the Inaugural Phase of Topographical Surveys, Route Surveys Beyond the Frontier of British India, the Revenue Survey of India, the Geological Survey of India, the Archaeological Survey of India, Astronomical Observations in India, and the Statistical Survey of India.

The Observations conducted at Kavalur during the 10 March 1977 Uranus occultation of SAO158687 revealed, apart from the occultation by a satellite system known as the e ring, a decrease in the star's brightness near the moment when the planet's atmosphere could have triggered the occurrence. Since then, a theoretical explanation for the genesis of the a, ß, ?, and d rings has been put out in addition to the identities of these rings becoming firmly established. After thoroughly analysing the Kavalur photoelectric record, they provide several novel elements of Uranus' satellite ring system.