Longitude, notice of F. Baily's method of determining, by the culmination of the moon and stars, ix, 107.
—, determination of, by means of shooting stars, xxxix, 372; xlii, 399.
—, arc of, between Dublin and Armagh, xxxviii, 113.
— deduced from the eclipse of Sept. 18, 1838, xxxix, 367.
— of New York, v, 143.
— of New York City Hall, xxxviii, 113; xl, 43.
— of Alexandria, D. C., xxxix, 368.
— of Boston, xl, 43.
— of Brooklyn, N.Y., xxxix, 369; xl, 43.
— of Burlington, N.J., xxxix, 368.