E. 8. Holden—Measures of the Rings of Saturn. 393 
been, and I am, somewhat skeptical as to the reality of this 
difference. In a system so complicated as that of Saturn con- 
stant errors may easily creep in. It was for that reason that I 
had constructed in Washington the terrestrial eye-piece which, 
unfortunately, I could use only on two nights. The terrestrial 
e fo 
een 
the measures themselves, and I propose to carry t on 
until some satisfactory solution of these systematic diferenses 
is reached. 
So far I have only considered the residuals ¢/—li, and they 
show a sage el agreement throughout my own three series 
and agree with those of M. Meyer. en we come to con- 
sider the pies values of the things measured the discrepan- 
cies are relatively enormous. For example, ¢/in 1879 I found 
to be 7°50 +0".04 from thirteen nights, while in 1881 I found 
cf to be 6’"63+0'051 from eleven nights 
I can scarcely believe that even in these delicate measures I 
could make a constant error of nearly 1” in are in the measure 
ty) 
this unsolved state is that by so doing M. Meyer’s conclusions 
may be examined more closely by those possessing large tele- 
scopes, and as other measures appear to present the same anom- 
alies, sepa I shall endeavor to present further evidence on 
this point. 
o not believe that the difference in the telescopes employed 
has anything peg to do with the ee in results. The 
edges of ring e well seen in both telescopes. 
d a few esau of the position of belts on Saturn’s sur- 
face made in 1878. I did not continue these measures longer 
as no useful result seemed to be promised. 
