238 Gould's Report on Trans-Atlantic Longitude. 
The mean interval between the moments of giving the sig- 
nals and of their record upon the chronograph sheet is similarly 
found to have been 
October 25, 0°62 + 0°-008 
26, 9 
, 0°64 “010 
November 5, 0°59 004 
6, 0°55 007 
9, 054 “005 
in which the quantities appended are the probable errors of the 
respective determinations as deduced from the total results of 
the several sets, there being six sets for each determination 
except that of November 6t 
Between Heart’s Content and Calais the clock signals were 
much less satisfactory ; being obtained only on four nights, on 
only two of which the clock errors could be determined either 
immediately before, or soon after, the exchange, and on one 
exhibit, however, better 
pected, and are as follows (subject to a correction for perso 
equation) 
1866. A. Me 
December 11, 0° 56™ 37°89 0°24 
12, 87°53 0°31 
14, 87°84 0°27 
16, 87°78 0°28 
From t g_ signals, 
hooey on page 236, it will be seen that there is introduced, in 
; e deflection of the light-spot 
from the galvanometer, sends a second telegraphic si 
own chronograph. The whole interval, «, therefore, which 
. een the giving of a signal at one station and its 
oneenog _ record at the iin, Ws ted up of several parts. 
