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This fond contains correspondences related to queries sent to Kodaikanal Observatory.

This is a letter from V.H. Vader to the Director of the government Astronomical Observatory Kodaikanal regarding some solutions for astronomical problems. There is a set of questions attached to this letter for the above-mentioned problems, along with an observation sheet.

This is a Letter from R. K. Rangachan to R. L. Jones regarding the lunar eclipse. It is a query asking if there was a lunar eclipse visible in India on May 7, 1715. It also says that A.D.Maestro Servel and Dikshit stated in their Hindu calendar that there was a total eclipse of the sun on April 22 previously.

This is a Letter from Pirojshaw H Dasteer to the Director of Kodaikanal and Madras Observatories regarding the sun's entry into Aries. Through this query, he asks 2 main questions: which zodiac was the sun when he entered it, and when and at what time does the sun really enter the first star of the Aries?

This is a Letter from L.D Swamikannu Pillai to the director of the solar physics observatory regarding a strange sound produced at Seetharampuram Udayagiri taluk. It also forwards a copy of the report from the tahsildar.

This is a Letter from L.D Swamikannu Pillai to the director of the solar physics observatory regarding a strange sound produced at Seetharampuram Udayagiri taluk. It also forwards a copy of the report from the tahsildar. This item also contains a reply to the query from the Director of Kodaikanal and Madras Observatories stating that the strange sounds may be produced underground and may be of the same nature as the sounds heard in the Ganges. The reply also points out that if any reports are available from the surrounding villages to determine from which place is the sound loudest.

This is a Letter from L.D Swamikannu Pillai to the director of the solar physics observatory regarding a strange sound produced at Seetharampuram Udayagiri taluk. It is reply stating that an eye sketch of the locality is submitted and mentions some of the villages where the sound is reported. It also states that the sound is loudest at Pandranga, Narayanpet and Seetharampuram.

This is a letter from John Evershed, the Director of Kodaikanal and Madras Observatories, to the District Magistrate Nellore enclosing the sketch of the locality where the sound is the Loudest. It also states that the superintendent geological survey of India informed that similar sounds are heard in Ongole, and they are mostly due to temperature effects causing fractures in the massive quartz magnetite rock of which the country is composed.

This 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.

This is a letter from F.W. Pirrie Lieut-colonel to The superintendent of Telegraph Madras regarding the longitude of the point which is used to estimate madras time.