ON THE LIGHT OF.THE MOON AND OF THE PLANET .JUPITER. 215 
fius id Ss : ; 7. . 
= A Mare Tranquillitatis, 
AR Mare Orisium ; 
CEU i Mare’ Tranquillitatis, ` 
H > d 340 ` 
== Mare Crisium. | 
p! 13 ui 
Neither of the two methods adopted in these reductions can claim much confidence, 
since we know so little of the nature of the reflecting surfaces ; ‘however, the fact of the 
greatly superior albedo of J upiter is ‘satisfactorily established, each EE ER con- 
firming the result first obtained. ` EUM qa 
If now we return to the Geh experiments; we "find for " ratio of the chem- 
ical albedo, so to speak, ‘of the two bodies, ; ; 
4 Average dhemit. intensity of Full Moon . D SH 
Average chemical intensity of Jupiter wu. 
If we assume a similar distribution of the chemical and optical rays at the different 
phases, we may ai the UOTIS 
as in (51). We then have | | 
Chemical albedo of Moon 1. 
Chemical albedo of Jupiter CM 
agreeing quite as well as could: have been NEA = (51), viz 
Optical albedo of Moon __ ee 
eer albedo of Jupiter 11.47 
The most satisfactory estimate of the degree of whiteness of the Moon’s surface, com- 
pared with objects on the Earth, is contained in the following statement by Sir John 
Herschel. 
