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st important seismic regions, and the positions of the principal towns, bays, etc., mentioned in the text. (Plate II.) Near the left margin of this second map will be found an index of the seismic regions just mentioned, each of them being represented by its ordinal number (large Roman figures). Near each of these ordinals is placed the corresponding number of earthquakes since 1862 contained in the catalogue (Arabic figures), which is followed, in brackets, by an analysis of the said number, in which Roman figures designate the degrees of the earthquake, scale of De Rossi-Forel, while small Arabic figures, written like exponents, give the number of earthquakes of each degree of intensity. In drawing the map on Plate II it was not intended to represent the epicentric area of every individual earthquake center (which would have crowded the map beyond reasonable limits), but rather to show the principal seismic regions. Hence most of these curves contain more than one focus. The approximate position of each of the latter has, however, been indicated by a star, while the figure placed close to the star gives the number of earthquakes which proceeded from the said center. A word must be said in apology for the constant use in the following list of the Spanish word "_convento_." This word which means monastery, cloister, or convent, is universally used in the Philippines to designate also the habitation of the clergy attached to a parish church. Although these are, as a rule, spacious buildings and were formerly inhabited well-nigh exclusively by friars, they can not properly be called monasteries. Wherefore, in order to avoid lengthy circumlocutions, the Spanish word "_convento_" has been retained. The reader who is not familiar with this country may find it strange that in reporting earthquake damages so much emphasis appears to be laid on the harm done to churches and _conventos_. This is easily explained by the fact that these buildings were often the only structures within the meizoseismal area, and built nearly everywhere in the most substantial manner. In the present catalogue we have also included, by way of an appendix, the earthquakes which are known to have occurred in the Marianas or Ladrones group of islands. While their number is too small to warrant separate publication, we believe that the data concerning them will be welcome to the earthquake investigator. CATALOGUE OF VIOLENT AND DESTRUCT
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