On the Earthquake in Chile, 1851. 391 
our servant had been despatched immediately that the great 
shock ceased, to learn the condition of the instruments. Fol- 
lowing a few minutes later, the rocky mass was found broken 
across from east to west between the observatories and castle, 
and a crevice remained, which, at the surface, was nearly an inch 
wide. A glance showed the instruments uninjured, but one of 
that occupied a portion of every thoroughfare. : 
Where the tiles had not fallen, the roofs looked as though 
the Plaza th flered most seriously ; all its arches 
fh saa > — a the key-stones settled an inch 
