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 Jan. 20: 1h. 15 m.—A similar arrangement was seen (Fig. 15). There were three satellites, so small as scarcely to be distinguishable; their distances from Jupiter, and from one another, were not more than 1′. I was doubtful whether on the western side there were two satellites or three. About the sixth hour they were grouped in this way (Fig. 16). The eastern satellite was twice as far away from Jupiter as before, that is 2′; on the western side, the satellite in the middle was distant from Jupiter 0′ 40″, and from the satellite still further to the west 0′ 20″; at length, at the seventh hour, three satellites were seen on the western side (Fig. 17). The satellite nearest to Jupiter was distant from the planet 0′ 20″; between this one and the satellite furthest to the west there was an interval of 40″, but between these another satellite was in view slightly southward of them, and not more than 10″ off the most westerly satellite.

Jan. 21: 0h. 30 m.—There were three satellites on the east side; the satellites and Jupiter were at equal distances apart (Fig.18). The intervals were by estimation 50″ each. There was also one satellite on the west, distant 4′ from Jupiter. The satellite on the east side nearest to Jupiter was the least of all.

Jan. 22: 2 h.—The grouping of the satellites was similar (Fig. 19). There was an interval of 5′ from