81 
Greenwich 
Mean Time. 
March 30 -369639 1® 22 27%34 + 19° 37’ 143 
April 7 *324534 3. 7 57°46 13 17 3°9 
3» lo oe 42 4 13 16°36 5 44 2:4 
1854. Appar. a. Appar. 0. 
The corrections for aberration and parallax were obtained by 
the aid of my first set of elements, which, as it happens, ap- 
pear to be unexpectedly near the truth. To save you the 
trouble of reference, I here place the two sets side by side. 
First Approx. 
Greenwich M. T. Second Approx. 
T March 24-01183 March 24:01376 
T CAA aed 213° 50’ 89 
R 315 34 50 315 28 16°1 
z 82 42 26 82 30 17 °4 
log q. 944192 9-449544 
Retrograde. Retrograde. 
“The second set of elements are referred to the mean 
equinox of April 0:0. The most remarkable circumstance 
connected with them is, that the observations are precisely re- 
presented by them: the correction of the calculated middle 
place, to reduce it to the observed, is 
+ 0”1 in longitude, and + 0’:3 latitude. 
I do not recollect that in all my calculations I have ever 
known a parabolic orbit to agree so closely with the observa- 
tions on which it was founded. 
“You probably recollect that the first set of elements are 
founded on the Markree observations of March 30, April 1, 
and April 3. 
‘¢ Tf you think these results worth laying before the Royal 
Irish Academy, at their next meeting, may I trouble you to 
do it? I can easily make the communication somewhat 
longer if you judge it necessary, by entering more into the 
details: but, perhaps, the whole affair may be too trifling to 
occupy a moment’s attention. Is not the perfect coincidence 
