of
such phenomena, to be included in the General Earthquake Catalogue
which this eminent seismologist is preparing under the auspices of the
British Association for the Advancement of Science. The said general
catalogue has been undertaken with a view toward reducing to
uniformity and completing those published years ago by Robert Mallet
(1859) and Perrey (1844-1871). The form adopted for Professor Milne's
new catalogue is very concise, comprising only the date, intensity,
and region together with principal localities affected. It will
contain only the earthquakes of intensities VII to X according to the
scale of De Rossi-Forel, and these will be divided into three classes:
Class I will be formed by the earthquakes of sufficient force to
produce cracks in buildings and to throw down chimneys; they
correspond to force VII of De Rossi-Forel. Class II consists of the
earthquakes which not only threw down chimneys but also walls and some
weak structures; force VIII of De Rossi-Forel. Class III comprises the
earthquakes which caused general destruction; force IX and X of De
Rossi-Forel. As this classification is as purely conventional as every
other and adopted only in the catalogue mentioned, we do not employ it
in the present catalogue of Philippine earthquakes, but retain the
almost universally adopted scale of De Rossi-Forel. We shall also
present more details as to the towns and buildings damaged, the number
of victims and other disastrous effects than enter into the catalogue
of Professor Milne.

Hence, the differences between the list prepared for Professor Milne
as well as the partial catalogue published in our Monthly Bulletin for
February of the present year consist in the following: (1) This
catalogue contains also several earthquakes whose intensities were
between VI and VII, while in the former only such figure as according
to their effects were decidedly of force VII. (2) The new catalogue is
more complete as to details concerning the towns, etc., which have
been destroyed.

It is to be regretted that we are unable to present here a complete
historical catalogue of all the destruction wrought in the Archipelago
by earthquakes since the time when Legaspi and Urdaneta first set foot
on these shores. But the old chroniclers, who dwell upon the political
happenings with an attention to detail which is occasionally overdone,
were invariably laconic when there was question of earthquakes and
similar natural pheno