E18 -- De Indorum anno solari astronomico

(On the Solar Astronomical Year of the Indians)

Summary (from the introduction to Kim Plofker's translation):

This work is an appendix to two appendices to a book by Euler's friend and Imperial Academy colleague T. S. Bayer, Historia regni Graecorum Bactriani (History of the Bactrian kingdom of the Greeks), St. Petersburg: 1738. The original appendices were written by a Danish missionary in Tranquebar, C. T. Walther ("The Indian Doctrine of Time," pp. 145-190), and by Bayer himself based on his correspondence with Walther and other Tranquebar missionaries ("Supplement to the Indian Doctrine of Time," pp. 191-200). Euler's contribution appears on pp. 201-213.

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