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 letter was about to furnishing the eclipse photographs as requested by Govt. of India.

This item was about total solar eclipse of 18th August 1868. At Masulipatnam Pogson detected the hydrogen line emission, with a spectroscope. He saw a bright yellow line near the position of D lines of Sodium. The line originated from hitherto unknown element later termed as helium after the source of earliest detection. Hand coloured sketch of the solar spectrum during the Total Solar Eclipse of 1868. Hand coloured picture of the sun before and after the total solar eclipse 1868.

The “Memorandums of the Imperial Academy of Sciences” publish scientific papers from various disciplines and contribute to academic research. Volume 52, containing the “Canon of Eclipses,” was a valuable resource for astronomy and astrophysics enthusiasts who want to study eclipses in the past and future and make predictions about such events. This publication comes from Theodor Ritter von Oppolzer and was published in 1887. The “Canon of Eclipses” was a comprehensive collection of over 13,000 solar and lunar eclipses, including all total solar and penumbral lunar eclipses between ?1208 B.C.E. and 2161 AD. This book provides detailed information on the timing, duration and location of all eclipses mentioned.