This letter concerns, Chree asking about the mean values of the magnetic elements at our stations in India.

The letter is from John Evershed to the Officer in Charge Dehradun, informing them of an issue with the earth inductor. It also states that repairing it at the Calcutta mathematical instrument office is better.

The letter was to inform Edward Barnes to arrange for trained workers for the magnetic observation that P. R. Chidambara Aiyar was supposed to do.

The letter is from E. C. J. Bond to the Director of Kodaikanal and Madras Observatories informing that the spare earth inductor and galvanometer are stored at Dehradun and other related specifics.

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 Madras and Kodaikanal Observatories, Kodaikanal, Via the Superintendent of the Trigonometrical Survey. Through this letter, E. C. J. Bond was conveying three suggestions to the magnetic observers to raise the calibre of the observatory magnet.

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 Kodaiknal Observatories, Kodaikanal. In this letter, he claims to have sent a registered parcel post to Kodaikanal that contained three strips of fine phosphor bronze fibre and four incredibly fine tungsten wires that could be used to suspend the magnetograph's declination. The letter was written in Dehra Dun in 1919.

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 Kodaiknal Observatories, Kodaikanal through the Superintendent of the Trignometrical Survey. Through this document, the author was inquiring how the tabulated data in the original and duplicate magnetic forms taken from Kodaikanal and delivered to the Survey of India office differed. Also provided are a few instructions for the observers. Letter was sent from Mussoorie in 1920.

Letter from E. C. J. Bond to the Director of Kodaikanal Observatory about recording the magnetic observations

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.

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.