C 323 3 
XXI. Eclipses of the Satellites of Jupiter, observed by John 
Goldingham, Esq. F. R. S. and under his Superintendance, at 
Madras, in the East Indies . 
Read June 30, 1808. 
T he following eclipses of the satellites of Jupiter, were ob- 
served with achromatic telescopes, by Dollond, of three and 
half feet focal length, and magnifying power between 70 and 
80 ; having been constructed more immediately for this pur- 
pose, for which they were exceedingly well calculated in all 
respects. 
An astronomical clock, with gridiron pendulum, and dead 
beat, regulated by transits of the sun and stars, was used for 
the time ; which was deduced from the transit of the sun 
nearest the eclipse, and verified by the one immediately pre- 
ceding or following. 
The circumstances under which the eclipses were observed 
are noted ; from these may be inferred, how far the results 
are to be depended upon : those observed with the “ air clear 
and the planet high,” are the most satisfactory and valuable, 
nothing to the contrary being afterwards expressed. 
The longitude of the place, by numerous observations of 
various descriptions, is £ h : 2i r : 14 /' or 8o° : 18' : 30" east of 
Greenwich : by comparing this with the numbers in the last 
column, the difference of the tables will be obtained. 
