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.
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