Xll 
APPENDIX. 
amination, have been taken to pieces since their return. Mr. Arnold states 
that he found the main springs of both the watches broken ; accidents which 
may have arisen from a flaw in the steel, or simply from the severity of the 
cold, as experience has shewn, that more main-springs break in frosty 
weather, than at other seasons. 
No. 286 has also been examined by Messrs. Finer and Nowland : the 
cause of its stoppage and subsequent irregularity, is discovered to have 
been the rusting of a spring connected with the teeth of the index wheel, 
which shews the number of days passed since the chronometer was wound. 
The introduction of this wheel, which, with ordinary attention, is not required, 
is particularly to be regretted on the present occasion, as from the very 
steady going of this watch before the accident took place, there appeared 
every prospect of its doing great credit to its makers. 
