230 Proceedings of Royal Society of Edinburgh. 
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Combination of both sets in abnormal 
position of grating. 
Azirn. to South — 618 for place of D 2 . 
„ S.W. - 617 
,, West = 619 
„ N.W. = 621 
,, North = 618 ,, ,, 
„ N.E. 4= 620 
„ East = 616 
,, S.E. = 617 
,, South = 618 
When dist. from D 2 to D 1 = 243 of the 
same units ; but error of obs. large. 
Corrected for 
Time Change. 
GO Oi 30 SO 00 !>• r— l O *0 
1 — l rl H rH 1 — • H (N (N H rl 
so so so so so so so so so so 
Temp. 
>p cm 
0 00 
CO CO 
Difference or 
Dist. D 1 to D 2 . 
10 1-1 
v** 
CM CM 
Micrometer 
Reading. 
UO O CO OO 00 N O CO ® O N H ffiO 
H CO HHHHO HhNhN fh CO 
COX CO CD CO CO CO CO CO -O CO CO cox 
Object 
Observed. 
QQ QCGPP GOQflfl GO 
Azimuth Observed 
in, or 
-4-5 4-j 
rS rS « - f "ao ~ 
^ ^ m 
fee g tc - - - - % % 
j 2 z " z be - 
5 hG 
Time of 
Obs. 
h. m. 
2 17 p.m. 
2 20 ,, 
'2 32 „ 
2 40 ,, 
