Royal Observatory Greenwich - GA has just returned from observing lighthouses in France. He cannot tell WW everything about the Board of Visitors meeting since both GA and Adams [John C. Adams] were not informed that the meeting was to be an hour early: 'So I found Lubbock [John W. Lubbock] in full speech, very absurdly as I thought, in the same strain as his printed papers. I endeavoured to explain in reply that there was no notion of preferring numerical to algebraical expressions &c'. A vote was taken before GA left early for his train to Dover. Sir James South was there protesting against any recommendation of grant to any body for any thing. Hansen [Peter Andreas Hansen] has theoretically investigated the variation and evection, and concluded that these rays do not agree perfectly with those observed because of the figure of the moon - 'this is the whole that Lubbock means by empirical'.
Observatory - Gives a note on perturbations intended for John W. Lubbock: 'If perturbations are applied to x y & z, there is no practicability of dividing the time of an apposition into different parts, as the calculation does not give the means of correcting the elements for the beginning of each part. Consequently the series used must be such as will apply from the beginning of an apposition to the end. It seems to me very probable that 5th or higher powers may be wanted'.
He congratulates him on his commercial tables: 'I admire your tables and have made use of one the 3 per cent. - It is exceedingly desirable to have the Constants of Commerce and Manufactures and when I have printed my volume I will try to make the manufacturers who are most interested collect more of them'.