The title "Les Observatoires Astronomiques" can be translated to Astronomical Observatories. This book consists of astronomical observations from the Royal Observatory of Belgium. It is written by P.Stroobant, E .Delporte, J. Delvosal and F. Moreau, and H. L. Vanderlinden. It is published in 1836

The letter is about the spectroheliograph building.

The letter is a reply to letter no. 2741 E stated that the pump house is only 6' * 6' and doesn't have space for a belt drive, suggesting a rotary pump for the motor drive. The second sheet is the plan of the motor house.

This letter is discussing there will be some difficulty with 12th readings of cloud motion meteorological observations on holidays unless some special arrangement is made

The letter was written by E. C. J. Bond, the officer in charge No. 18 party (Magnetic), Survey of India, to the Director of the Solar Physics Observatory, Kodaikanal. E. C. J. Bond has mentioned some suggestions to the magnetic observers to get accurate values during the observations. It was written in 1920 in Dehra Dun.

The letter was written by E. C. J. Bond, who was the officer in charge No. 18 party (Magnetic), Survey of India, to the Director of the Madras and Kodaikanal Observatories, Kodaikanal through the Superintendent of the Trigonometrical Survey. This letter lists the dates that the observation result was missing, together with the declination traces, H.F. traces, and V.F. traces. It was written in 1920.

This letter is for returning the plans and estimates for the photographic assistant quarters countersigned

This is a Letter from the director of the Kodaikanal and Madras observatories to the sub-division officer P.W.D Kodaikanal informing that even if the work of the electrical installation at the observatory is incomplete the work is satisfactory and there are no papers referring to the installations. It also informs that if a completion certificate is send he would sign it.

This is a letter from the director of Kodaikanal and Madras Observatories to the Superintending engineer Trichinopoly informing that the plans and estimates which were referred to were sent to the executive engineer madura special division with a copy of the government order.

The letter discusses about the report to be prepared by A.Fowler for IAU commission on standard wavelenth and he asks John Evershed for any special suggestions to add in the report.