147 
of the variable Star in Sobieski’s Shield. 
regard to a series of the greatest irregularities ; at present let us 
proceed to take a few views of the intervals of its least bright- 
ness, which, contrary to my expectation, I find much more 
difficult to explain than those of the full, although the results 
disagree less among themselves. The darkened face of the 
star is here represented with a few small changeable bright 
spots, placed in general, at a proper distance, so as to keep up 
an uninterrupted increase and decrease of light with regard 
to us, and are also made to correspond with several other 
observations. 
4 th View. 
Fig. 4 is to explain the greatest interval of 74 days, 
between July 4th, and September 16th 1 799. (See Table X.) 
The darkened hemisphere here exhibited is its minimum July 
4th, with the following spots, w nearly gone off, next a small 
one /, then another P of a similar size, preceding the centre a 
day or two, (or a few degrees,) and lastly a bright one at D, 
just appearing. During the rotation, D losing its light and the 
P becoming much brighter, the star at its next return in 6 2 days, 
when at its first position, must of course appear much brighter, 
(See fig. 5) but by the retiring of l and P continues to dimi- 
nish in lustre till the appearance of some large spot from the 
other hemisphere ; which taking place 12 days afterwards, 
will, (when this time is added to the 62 already revolved) 
make the revolution of 74 days, as required ; for a view of a 
short interval, for the present let that of 56 days be taken, 
between August 2 1 st and October 1 6th 1801. ( Seo T able X . ) 
