The item contains six telegraphs from the Telegraph Director in Bombay, with four directed towards Kodaikanal and two towards Chetput(Chennai). One is a request for a copy of the magnetogram taken during the magnetic storm.

This item was a optical instrument named as Stereoscope. Stereoscopes are apparently those optical devices that help to view the two images separately and with relaxed eyes. There are two types of stereoscopes as: lens or pocket stereoscopes and mirror stereoscopes. Lens or pocket stereoscopes are great for viewing the whole overlap area of prints up to 9 cm × 13 cm or parts of larger patterns. On the other hand, mirror stereoscopes were designed to accept standard 23 cm × 23 cm metric air photos and work well with A4/US letter-sized prints. Most models come with magnifying options up to eight times, which is pretty impressive. One cool thing about mirror stereoscopes is that they are large enough to allow the analyst to draw beneath them, so it is possible to trace objects identified in the stereoview with a pen onto one of the images or a transparent overlay. However, it's important to remember that this sketch wouldn't have the geometric properties of a map as it contains all distortions present in the base image.

This item contains certificate and its citation of the "Shanti Swarup Bhatnagar Prize" for the year 1970 for his outstanding contributions in Physical Sciences.

This letter is a schedule of requirements and schedule of demands for original works and repairs for 1903-1904

The letter is to the Sub Divisional Officer, PWD, Kodaikanal, requesting to arrange for the painting of the thermometer house, magnetic hut and office room during that year.

Results of observations of the fixed stars made with the Meridian circle at the Government Observatory, Madras in the years 1880,1881 and 1882.

Results of observations of the fixed stars made with the Meridian circle at the Government Observatory, Madras in the years 1877, 1878 and 1879.

Results of observations of the fixed stars made with the meridian circle at the Government Observatory, Madras in the years 1865, 1866 and 1867.

Results of observations of the fixed stars made with the meridian circle at the Government observatory Madras in the years 1874, 1875 and 1876.

Results of observations of the fixed stars made with the Meridian Circle at the Government Observatory, Madras, in the years 1871, 1872 and 1873.