Mr* herschel’s Aftronomkal Qlfervaiiom 
T>. H. M. s. 
From May 9 1 1 o 45 
to May n 12 r6 48 
Divided by 2 revol. 2 1 16 3 
Gives 1 revolution — 24,h. 38'’ 
A fecond fmall interval. 
May 11 10 17 48 
1 3 2 5 5 1 
2 revolt 2, 1 8 3 
3 revolution =-24h. 34/ 1 
Here we have two very fhort intervals that agree to 4', which’ 
is more than, we could have expe&ed in. fuch. fhort periods of 
time.. 
Comparing together obfervations that were made at a greater 
diftance, we find, 
FirJft monthly period, 
May 11 10 1 7 48 
j ^ f allowing 3 ' becatife the. obF. fays the. 
J une 17 9 9 2 ® f fpot was rather . 1 mbre, advanced. 
36 revol. 36 22 51 32 
1 revolution = - 24.I1. .38' $ n 
Second monthly period,, 
May 11 i: i: 42 48 
J 5 allowing 3 ' for the time the fpot would have- 
Ulie I 0 II JO 2r2-i taken to coiae to the place mentioned.. 
38 revol. 39 o 7 34 
1 revolution = 24 h.. 38' 5", 4* 
Third 
