The Bakerian lecture. - On the radiation of heat from the moon, the law of its absorption by our atmosphere, and its variation in amount with her phases

In this paper is given an account of a series of observations made in the Observatory of Birr Castle, in further prosecution of a shorter and less carefully conducted investigation, as regards many details, which forms the subject of two former communications to the Royal Society. The observations were first corrected for change of the moon’s distance from the place of observation and change of phase during the continuance of each night’s work, and thus a curve, whose ordinates represented the scale-readings (corrected) and whose abscissas represented the corresponding altitudes, was obtained for each night’s work. By combining all these, a single curve and table for reducing all the observations to the same zenith-distance was obtained, which proved to be nearly, but not quite, the same as that found by Professor Seidel for the light of the stars.