Mr. Henry Pratt has also kindly handed me for use his notes of the Lunar eclipse of August 23, 1877, as seen at Brighton on a splendid night. They were made as the phenomenon progressed, are 58 in number, and in many instances only a few minutes, or even seconds, apart. A selection of them is here given:—9h 13m 50s, first contact of shadow. 9h 30m, shadow very dark; no details of disk easily seen. 9h 40m, first appearance of red. 9h 50m, _red_ all over disk, except margin bluish and S. part green tint. 10h 2m, _a sudden brightening of whole disk_, in strong contrast to two minutes previously. 10h 15m, _E. limb much darker_. 10h 35m, _south pole decidedly brightest_. 10h 44m, _S.E. limb much brighter_. 10h 48m, _whole disk much darker_. 10h 51m, _S.E. limb brightening again_. 11h 1m, _N.E. limb brightening_. 11h 3m, _N.E. limb has darkened and brightened three times during last two minutes_. 11h 20m, N. pole has _darkened_. 11h 21m, N. pole has _brightened_. 11h 24m 30s, N. pole darker _red_. 11h 35m, N. pole _bright_. 11h 35m 30s, same _dark_ and _red_. 11h 42m, N.E. limb especially bright for a few seconds, and then _reddened_ and shaded again. 11h 49m, _S. pole reddened_. 12h 1m, _S.W. limb reddest part; S. pole red; N. pole paler red_. 12h 3m 50s, first appearance of E. limb (my first sketch was made shortly after this, and my second about ten minutes later). 12h 21m, a bright patch on N.N.W. separated from N. pole. 12h 24m, _S.W. region is reddest part of eclipse_. 12h 40m, _redness_ of shadow fading out. With a small Browning star-spectroscope Mr. Pratt saw the red and blue ends of the spectrum cut off, but nothing else. Mr. Pratt adds that the _red_ colour was not an effect of contrast or an optical delusion in any way, as was proved by using at times a limited field containing only the red portion under examination. In reference to the curious brightening and darkening of the disk, and the change from time to time of local colour, he says that with much experience he has seen nothing of the same marked character on other occasions, and that “the whole matter was at the time astonishing to me, but none the less real.” The local red patches seen by me seem also to have been observed by Mr. Pratt. [Sidenote: Mr. Pratt’s observation on the floor of Plato.]