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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.

A

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* Longitude of Frontera.....

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* Reducod from Greenwich observations for 1851.59.

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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.

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Longitude of San Elceario from first lunation ........

Do..........do....... from second lunation.......
Do.......... do....... from third lunation.........
Do.... .....do....... from fourth and fifth lunations............

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h. m. S. 705 02.85 7 05 06.70

05 05.27 7 05 02.44

Longitude of San Elceario =7h. 05m. 049.43.

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

14th February, 1852.

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TABLE III-Continued. Difference of longitude between Frontera, and San Elceario, by flashes of gunpowder, made on the

18th February, 1852.

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Mean difference of longitude by 15 flashes of gunpowder, February 18.............. 1m. 07.548.

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