Scope and Content: To establish accurate Massachusetts town boundaries, and eventually interstate boundaries as well, beginning in 1885 the Topographical Survey Commission sent out field teams to establish and describe triangulation stations and to set monuments designating boundary lines.  These volumes of computations of primary triangulation are based on field notebooks of the survey teams.  Computations were verified, adjusted, and prepared by the U.S. Coast and Geodetic Survey.
Arrangement: Arranged chronologically, thereunder by locality
Notes: Spine title: Primary and secondary triangulation
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