194 
also in the anticipation that other important steps in mathe- 
matics may be made by the help of Sir William Hamilton’s 
imaginaries. I hope before long to be able to’ furnish the 
Academy with some reply to the questions here suggested. 
Rev. Samuel Haughton made some observations on the 
Rev. Dr. Graves’ paper. 
Rey. Humphrey Lloyd, D.D., read a further communi- 
cation ‘on the magnetic influence of the Moon.” 
_ The President and Rev. Samuel Haughton made some re- 
marks, eliciting explanations from Dr. Lloyd as to the analogy 
of the magnetic phenomena described by him, to correspond- 
ing phenomena connected with the tides. 
In the absence of Edward J. Cooper, Esq., his Paper on 
‘‘ Keliptic Catalogues” was read by the Secretary :— 
_ « Having completed the catalogues of ecliptic stars obser- 
ved here during six years, it occurred to me to employ a few 
holidays, which I gave myself after the publication of our third 
volume, in examining some of the general results deducible 
from them, and comparing these results with concurrent me- 
teorological phenomena. My object was to ascertain the sound- 
ness of a preconceived opinion, that the records of the state of 
the weather are useless as a guide in estimating the most fa- 
vourable periods of the year for astronomical observations. To 
the investigation I added a search for any striking facts that 
might appear during the course of the work, in which Mr. 
Graham has been the principal performer, in the capacity of 
an indefatigable observer. 
“‘'The mode of proceeding which we originally adopted 
was, as is stated in the Introduction to the first volume of 
‘Keliptic Stars, one which we considered the most likely to 
