On a New Method of recording differences of Declination. 7 
16th. 17th. Diff. Seconds, 
M.. « Bootis to 4969 L. “6060 6064 0004 0”-016 
~ 4969... ** .« Cor..L. 0448 0351 0097 0 -338 
«Cor, ‘ 4706 M. 6889 6873 0016 0 -064 
4706 “ « Bootis M. +5480 5399 0081 0 +324 
« Bootis * 4933 L. 0051 9946 0095 0 -380 
4933 * 5120 L. 2553 2605 0052 0 :208 
5120 “aSerp. M.  -0815 “0992 0177 0 -738 
) 0 302 
B. A.C. No. 6084, to 6323 5820 5896 0076 0/304 
< me é Bootis 1335 1319 0016 0 -064 
“ “ « Corone 1407 1399 0008 0 -032 
“ “ 6657 1662 662 0000 0 -000 
“ “ 6106 6430 6614 0234 0 -936 
“6 “6 6589 7340 7 0040 0 -160 
“ “ « Bootis 1530 1670 0140 0 540 
“ mt (ae 1669 1699 = 0030S 0-120 © 
“ $6 « Herculis 9980 0046 0066 «=O 
“ “ « Serpentis 0540 0576 0036 0-140 
10)2 -560 
2)0 -256 
0 -1280 
Here it will be seen there is no accumulation of error due to 
: : 
between stars may be accomplished with an accuracy equal to 
the best micrometer work, when the stars are but a few seconds 
apart. 
The best work done in the world, (so far as I know, ) has been 
accomplished in the Imperial Russian Observatory at Pulkova, 
and is reported by M. Struve in his great work on that institution. 
y the greatest refinement of art and skill on a few stars, the 
( nee between the determinations of different nights has 
been brought to within a limit of probable error of two-tenths of 
one second of arc. It will be seen by examining the results re- 
ported, that the new method, in the very infancy of pend a- 
tion, with defective instruments, low optical power, an with 
in Wei ay a eee, re g to contend with, h , ady rivalled 
Eo 
