MADE AT LANCASTER. 65 



hazy, on which account I have deducted 20" from the obser- 

 ved time of the observation in deducing the longitude from 

 it: — magnifying power 100. 



The 2d satellite was expected to emerge about 56 minutes 

 after the 1st: after looking for it at least 4 minutes beyond the 

 calculated time, I discovered that it had emerged in contact 

 with the 1st. 



15th. Emersion of the 3d satellite of Jupiter, observed at 

 9 h 45' 8" mean time, or 9 h 49' 7" apparent time: night clear, 

 — magnifying power of the telescope 100. 



29th. Emersion of the 1st satellite of Jupiter, observed at 

 8 h 40' 4" mean time, or 8 h 43' 7" apparent time: — night 

 clear, magnifying power 100. 



June 4th. In the evening, the moon occulted two small 

 stars in (as) Cancer. 



h I II h I II 



Immersion of the 1st, at 8 46 



do. 



of the 1st, at 8 46 C> nn .. Cat 8 48 11 } 



of the 2d, at 9 11 12j meln tlme ' or (at 9 13 23 j "PP*™ 1 timf ■ 



The last immersion took place so near to the extremity of 

 the moon's southern limb, that it did not appear probable the 

 moon's disk would extend 30" south of the star. — In each of 

 these occultations, the stars appeared plainly defined on the 

 edge of the moon's disk some seconds before the occultations 

 took place : — in the last case, the star, by being so near to the 

 southern extremity of the moon, appeared to be in contact with 

 her limb for nearly 10 seconds, and for an equal space of time 

 defined on the edge of the disk. 



5th. Emersion of the 1st satellite of Jupiter, observed at 

 10 h 34' 55" mean time, or 10" 36 ,: 53" apparent time. The 

 night clear, but the belts were scarcely visible, and the limb 

 of the planet uncommonly tremulous: magnifying power 100. 



21st. Emersion of the 1st satellite of Jupiter, observed at 

 8" 52' 41" mean time, or 8" 51' 26" apparent time: the 

 planet and satellites well defined, magnifying power 100. 



July 14th. Emersion of the 1st satellite of Jupiter, observed 

 at 9 h 5' 22" mean time, or 9 h 0' 0" apparent time. The pla- 

 net was so low and tremulous that the belts were not discern- 

 ible: — magnifying power 100. This observation, as well as 



L 



