This item is a Letter from G.J.J Harris consulting architect to the Director of Kodaikanal Observatory regarding the plans and estimates amounting to Rs.5178 for works to complete the Kodaikanal Observatory.

The letter is from G. T. J. Harris, Consulting Architect to the Government of Madras, to the Director of Kodaikanal Observatory regarding a porcelain sink for photographic work that was intended for is in the India Office as such was not available in India. The cost is 5 pounds, whereas a sink made of porcelain enamel fit reclay would only be 1-15-0 pounds. Hence asking the opinion on which to be brought.

This document originates from G.J.J. Harris, a consulting architect the Government of Madras engaged. It is addressed to the Madras and Kodaikanal Observatory director about the approval and submission of plans and estimates related to the construction of Kodaikanal Observatory buildings. Various aspects necessitated official sanction, encompassing the workshop for the mechanic, estimates for water supply in the director's residence, construction of a verandah for writers' quarters, provision of bookcases and furniture, landscaping of the grounds, provision of mats for the assistant's house, erection of additional outhouses for the first and second assistant quarters, and the construction of the observer's house at Periacolum, along with associated compensation. The communication underscores the comprehensive nature of the proposal, seeking the necessary approvals for diverse elements crucial to the successful realization of the Kodaikanal Observatory infrastructure.

This letter discuss about equation of a hyperbola and their work.

This letter was a request regarding the present state of knowledge about the periodocity of sun spot activity.

The letter is a forwarded copy of a letter from G. S. Rama Ayyar, Superintending Engineer, VI circle, to the Executive Engineer, Madura Division, asking for the action report taken on the installation of a new pump, asking to take it urgently as the Director needs it to be installed before Christmas.

The letter is from G. S. Rama Ayyar, Superintending Engineer, VI circle to the Director of Kodaikanal and Madras Observatories asking whether arrangements can be made to fit the pump in next April or May as the funds might not be available for the cost of the pump during the official year.

This letter was about sending a copy of the "Preliminary note on Srimangal earthquake of 8th July 1918".

The letter informs about the handing over the reports of different observers in Northern India with regard to the earthquake of the 4th of April

This is a reply letter from Gilbert T. Walker to the Director of Kodaikanal and Madras observatories informing that the drums of the thermograms are not always interchangeable. It further states that he is giving calcutta office instructions regarding sending of the drums.