The work recently completed In the West Indies was dependent on Dr. Meinesz's previous important discoveries in the Dutch East Indies. There he found a narrow band of strong negative anomalies, about 100 miles wide and 5,000 miles long, extending along the southwest side of Sumatra and Java, then crossing northward east of the Philippines. The band is bordered on either side by bands of positive anomalies. The negative strip does not show a direct relation to topography.