50 Dr. Herschel’s Discovery of Jour additional 
April 5, 1783. A suspected satellite was delineated, but the 
6th it was seen remaining in its former place. 
Nov. 19, 1783. A supposed satellite was marked down, but 
no opportunity could be had to account for it afterwards. 
Nov. 16, 1784. Supposed 1st and 2d satellites were pointed 
out, but not accounted for afterwards. 
Many other fruitless endeavours for the discovery of satellites 
were made ; but, finding my instrument, in the Newtonian 
form, not adequate to the undertaking, the pursuit was partly 
relinquished. The additional light however which I gained, by 
introducing the Front- view in my telescope, soon after gave me 
an opportunity of resuming it with more success. 
Jan. 11, 1787. Three supposed satellites were observed: a 
first, a second, and a third. Jan. 12, the 1st and 2d were gone 
from the places in which I had marked them, but the 3d was 
remaining, and therefore was a fixed star. * 
Jan. 14. A supposed 3d satellite was delineated, but on the 
17th it was found to be a star. 
Jan. 17. Supposed 3d, 4th, and 5th satellites were marked, 
but were found remaining in their former places on the 1 8th. 
Jan. 24. Supposed 3d and 4th satellites were noted, but the 
weather proving bad on the succeeding nights, till February 4, 
they were lost in uncertainty. 
Feb. 4. A 3d satellite was marked, but not being afterwards 
accounted for remains lost. 
Feb. 7. A supposed 3d satellite was proved to be a star the 9th. 
Feb. 10. Supposed 3d and 4th satellites have not been after- 
wards accounted for. 
* It has already been shewn, in a former paper, that the removed satellites were 
those two which now are sufficiently known. 
