212 ^^ic Philippine Jounial of Science isis 



analyses of which are given in his manuscript report. These 

 show fairly pure limestone, usually with less than 1 per cent of 

 magnesium oxide. 



In the summer of 1912 Mr. Wallace E. Pratt, a geologist of 

 the Bureau of Science, was detailed to make a rapid reconnais- 

 sance of the xegion about the town of Janiuay at the edge of the 

 foothills on the eastern side of the cordillera in order to ascertain 

 the possibilities of finding petroleum in the sedimentary for- 

 mations. During his work on Suague River, which flows past 

 the town of Janiuay, it occurred to him that there were artesian- 

 water possibilities in that region, and he reported this to the 

 Director of the Bureau of Science. 



In the latter pai-t of December, 1912, I was detailed to follow 

 up the suggestions made by Mr. Pratt in regard to artesian- 

 water possibilities, in an effort to aid the Director of Public 

 Works in the important project of providing the city of Iloilo 

 with an adequate supply of pure water. During the course of 

 this work, which was confined rather closely to that section of 

 the country immediately northwest of the city of Iloilo, the 

 following notes regarding the general and economic geology of 

 that part of the island were made. I was assisted in the field 

 by Mr. Percy Kincaid, formerly of the Bureau of Science, and 

 was furnished survey notes by Mr. R. L. Moore, of the Bureau 

 of Lands. 



GENERAL STATEMENT 



A description of the general geographic features of the Island 

 of Panay based on Abella's work ^ follows, Panay, which be- 

 cause of its size, richness, and population is the most important 

 island of the Philippines after Luzon, is situated among the 

 Visayans precisely in the center of the Archipelago and is found 

 comprehended between the latitudes 10^ 24' 37" and 11° -55' 57" 

 north and between the longitudes 125° 30' 16" and 126' 50' 24" 

 east of Madrid (121^ 50' and 123" 20' east of Greenwich). 



Panay has roughly a triangular shape. The greatest lengths 

 which can be taken from north to south and from east to west, 

 respectively, are 168 and 119 kilometers. The total area of the 

 island is 11,580 square kilometers, of which 4,547 apply to the 

 district of Capiz, 2,472 to that of Antique, and 4,561 to that of 

 Iloilo. The population of Panay consists almost entirely of Visa- 



' An unpublished translation of this important Spanish document was 

 made by Mr. McCaskey, formerly chief of the division of mines of the 

 Bureau of Science. This translation is on file in the library of the Bureau 

 of Science, Manila. 



