TABLE I.

Tabulation of results for longitude of astronomical station at Frontera observatory, derived from observations made with the bronzed transit and sidereal chronometer No. 2440, (by Parkinson & Frodsham:) By Major Wm. H. Emory, Chief Astronomer and Surveyor United States and Mexican boundary survey.

TABLE II.

Tabulation of results for longitude of astronomical station at San Elceario, Texas, derived from observations made with transit (by Troughton & Simms) and mean solar chronometer No. 76, (by Charles Young:) By Lieut. William F. Smith, topographical engineers, and by J. Lawson, under the direction of Major W. H. Emory, chief astronomer and surveyor of the United States and Mexican boundary survey.

TABLE III.

Difference of longitude between Frontera and San Elceario, by flashes of gunpowder, made on the

14th February, 1852.

TABLE III--Continued.

Difference of longitude between Frontera and San Elceario, by flashes of gunpowder, made on the 18th February, 1852.