156 APPENDIX. 
and on no account incorporated with observed quantities ; and 
moreover, that the observations upon which such index 
errors have been concluded, should also be preserved. Since, 
however, the guidance of the expedition will necessitate the 
calculations of many observations on the spot, the result of 
such calculations should be entered (as such), beside the 
observation from which they have been concluded. 
The Committee further recommend, that the chronometers 
with which the expedition has been provided by the liberality 
of his Majesty’s government, should on no account be cor- 
rected by moving the hands, however great their errors may 
become, not even in the extreme case of one or both of them 
having been allowed to run down. In case of such a mis- 
fortune (which should be most carefully guarded against by 
making it the daily duty of more than one person to remind 
their bearers to wind them up at a certain hour) it will be 
most convenient in the place of setting them, to defer 
winding them until the hours and minutes come round, at 
which they may respectively have stopped as near as may 
be ascertained from one to the other, or from both, to other 
watches of the party; and such event, should it take place, 
should be conspicuously noted in the observation book. And 
as a further and useful precaution, it is recommended to keep 
some of the best going watches, belonging to individuals of 
the expedition, to mean Greenwich time, by frequent com- 
parison with one of the chronometers. 
In every case where time is observed, express mention 
should be made of the chronometer or other watch employed, 
designating it by the maker’s name and number, so that no 
uncertaintly may ever arise as to the proper application of 
the correction for error and rate. 
The rates of chronometers should be examined at any 
station where the expedition may rest two or more consecu- 
