IV. Extract of a letter from M. Gautier, Director of the Observatory at Geneva, to the President, accompanied with the Observations of Encke's Comet, made at Geneva in the months of October and November 1838
"IV. Extract of a letter from M. Gautier, Director of the Observatory at Geneva, to the President, accompanied with the Observations of Encke's Comet, made at Geneva in the months of October and November 1838." Monthly notices of the Royal Astronomical Society 4.23 (1839) 196-197