( 189 ) 



separation between the satellites, and therefore with this instrument 

 aud power first contact must have occurred about 12''02 m . Definition 

 is very bad, however, and in a larger telescope there probably might 

 still be a small separation between the limbs. 



12 h 10 m . They now appear as one elongated satellite. At times a 

 tracé of the notches is apparent. 



12 h 20 m . The elongation is now very nearly at right angles to the 

 direction of the motion of the satellites, and is so slight as to be 

 scarcely noticeable in this bad and unsteady definition. I think from 

 the smallness of the elongation that nearly half satellite I must be 

 concealed behind III. In this bad definition it is not possible to say 

 which satellite is in front of the other from the appearance alone. 



Het schrijven van den heer Stanley Williams bevatte nog de 

 merkwaardige mededeeling, dat ook hij, den 15 Juli 1902, dezelfde 

 conjunctie had waargenomen, die de heer Nijland beschreven had. Zijn 

 instrument was toen een 6 l / 3 eng. duims reflector, met eene vergrooting 

 van 225 maal. Ziehier de door hem medegedeelde bijzonderheden : 



1902 July 15, 13 h 45 m ,2. Satellites II and III are in contact, The 

 one will occult the other. See diagram ui Cb n • 



13 h 52 m . The satellites forrn one disc, which has the slightest 

 possible elongation in a north and south direction. Owing to con- 

 fused seeing this disc always appeared more or less fuzzy, and it is 

 impossible from the appearance alone to say, which satellite is occul- 

 ting the other. 



13 h 56 m . The combined disc is considerably elongated now. 



14 h 02 m .2. Satellites II and III in contact as in diagram adjoining 



noO 111 • 



14>>04 m . Satellites clearly separated. The occultation must have 

 been nearly central. II is a little more south now relative to III, 

 than it was before occultation. Possibly the slight elongation noted 

 at 13 h 52 m was not real. 



The above times are Greenwich mean times. Satellite III was on 

 the farther side of its orbit moving east, II on the near side moving 

 west. As the disc of III is larger than that of II, the phenomenon 

 should be described as a transit of II over or across III, rather than 

 an occultation of one satellite by the other. 



N.B. Het ar. midden van 13 h 45™,2, en I4n2 m ,2 is 13''53 m ,7 dus 

 l m l minder dan volgens de waarneming van den heer Nijland. 



13* 



