ks then undertook the work.--I attended the
meeting of the British Association held at York (principally in
compliment to the President, Dr Peacock), and gave an oral account of
my work on Irish Tides.--At the Oxford Commemoration in June, the
honorary degree of D.C.L. was conferred on M. Struve and on me, and
then a demand was made on each of us for _L6. 6s._ for fees. We were
much disgusted and refused to pay it, and I wrote angrily to Dr
Wynter, the Vice-Chancellor. The fees were ultimately paid out of the
University Chest.

"In this year the longitude of Altona was determined by M. Struve for
the Russian Government. For this purpose it was essential that
facilities should be given for landing chronometers at Greenwich. But
the consent of the customhouse authorities had first to be obtained,
and this required a good deal of negotiation. Ultimately the
determination was completed in the most satisfactory manner. The
chronometers, forty-two in number, crossed the German Sea sixteen
times. The transit observers were twice interchanged, in order to
eliminate not only their Personal Equation, but also the gradual
change of Personal Equation. On Sept. 30th Otto Struve formally wrote
his thanks for assistance rendered.

"For the determination of the longitude of Valencia, which was carried
out in this year, various methods were discussed, but the plan of
sending chronometers by mail conveyance was finally approved. From
London to Liverpool the chronometers were conveyed by the railways,
from Liverpool to Kingstown by steamer, from Dublin to Tralee by the
Mail Coaches, from Tralee to Cahersiveen by car, from Cahersiveen to
Knightstown by boat, and from Knightstown to the station on the hill
the box was carried like a sedan-chair. There were numerous other
arrangements, and all succeeded perfectly without a failure of any
kind. Thirty pocket chronometers traversed the line between Greenwich
and Kingstown about twenty-two times, and that between Kingstown and
Valencia twenty times. The chronometrical longitudes of Liverpool
Observatory, Kingstown Station, and Valencia Station are 12m 0.05s,
24m 31.17s, 41m 23.25s; the geodetic longitudes, computed from
elements which I published long ago in the Encyclopaedia
Metropolitana, are 12m 0.34s, 24m 31.47s, 41m 23.06s. It appears from
this that the elements to which I have alluded represent the form of
the Earth here as nearly as is possible. On the whole, I think it
probable that