1878.] Dr Pearson, On a series of lunar distances. 177 



We thus obtain: 



Theoretical app. dist. of nearest) nn^ „, a pi, 



Hmbs of ]) and © \ '^^ ^ ^^ 



Observed do. do. as per note- ) nnn f, m 



book 1 ^^ ^ ^ 



Error of observation (in defect) ... 1' 41" 



On the other hand, the formula employed, p. 169, gave 



P. M. T. (by Observation) 2" 23" 50" 



Ditto (by Chronometer) 2 26 38 



Error in time 2" 48" ( = 1 83" arc) 



also in defect, as the Moon was in the first quarter, and therefore 

 increasing her distance. 



This example was selected quite at random; except in this 

 respect, that Bessel's system would have required a little more 

 care in application had the Moon been approaching the Sun, and 

 the simpler case of the two was thought preferable as an example. 



ANNUAL GENERAL MEETING. 



October 28, 1878. 



Professoe G. D. Ltveing, President, in the Chair. 



The following were elected Officers and new members of Council 

 for the ensuing year : — 



President. 

 Professor Liveing. 



Vice-Presidents. 

 Professor Stokes. 

 Professor Newton. 

 Professor Clerk Maxwell. 



Treasurer. 

 Dr J. B. Pearson. 



Secretaries. 

 Mr J. W. Clark. 

 Mr Coutts Trotter. 

 Mr J. W. L. Glaisher. 



