0' 



•357 







•536 







•526 







•192 







•511 







•564 



212 Proceedings of the Royal Irish Academy. 



61 Cygni, which have been hitherto given {see Auwer's Ahhandlungen 

 der Akademie %u Berlin, 1868). 



Bessel, first fourteen raonths, 



Bessel, last three months, and Schliiter, 



Johnson, first eleven months, 



Johnson, last seven months, 



Struve, ...... 



Auwers, ...... 



To these should be added the result obtained by Peters from zenith 

 distance observations — 



Peters, 0"^349 



Auwers concludes, from his discussion of the whole subject, that 

 the value of half a second is more likely to be correct than the smaller 

 value which some of the observers have found. The new series of 

 observations here described seem to support this \"iew. 



The complete details of these observations and their discussion 

 are about to be published in Part III. of i\ie Dunsinlc Ohservations ; but 

 I have thought that this brief account of the results might be of inte- 

 rest to the Academy. 



