The fond contains observations of the meridian circle reductions ( refers to the process of correcting the observed zenith distances measured by a meridian circle instrument ) taken from the Madras Observatory from the year 1862 to 1887. Meridian circle reductions refers to a process in astronomy and celestial navigation that involves observations made with a meridian circle instrument.

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1864

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1868

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1872

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1874

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1875

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1880.

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1865

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1867

The book contains the meridian circle reductions taken from the Madras Observatory. The observation table contains the values of North Polar Distance and Right Ascension for the celestial objects in 1869