The readers of this monograph are familiar with the geographic location of the Philippine Archipelago. However, to have the facts clearly in mind, it will be stated that the group lies entirely within the north torrid zone, extending from 4[degree] 40' northward to 21[degree] 3' and from 116[degree] 40' to 126[degree] 34' east longitude. It is thus about 1,000 miles from north to south and 550 miles from east to west. The Pacific Ocean washes its eastern shores, the Sea of Celebes its southern, and the China Sea its western and northern shores. It is about 630 kilometers, or 400 miles, from the China coast,.
