Observations of gravity were made at 18 stations in Mexico between January 1, 1926 and December 31, 1928. (The positions of the stations and the values of gravity obtained during this period are included in the table accompanying the report submitted May 1930 by Dr. Sanchez to the Section of Geodesy as published in this Volume; descriptions of the gravity‐stations will be found in the “Memorias annuales del Departamento Geográfico de Campo” of the Dirección de Estudios Geográficos y Climato