+29
+30

NOTE. The columns headed "Deviation" contain the difference "Observation less Computation," expressed in thousandths of seconds; the numbers in the first of these columns being the direct result from the Catalogues, and those in the second, the same corrected by the quantities on page 11.

1854

8

1855

8

The order of some of the dates in Table II. is reversed in printing: that is, the date for Declination is before that for A.R.
It should perhaps have been stated, that the logarithms a, b, c, d in Table IV. are in the original order of Bessel; the English
have arbitrarily changed a, b, c, d to c, d, a, b, and the same inconvenient alteration has been made in the American Ephemeris.
Log a is the log of the annual precession in A.R.; u, u' are proper motion; is ·

T

In reducing to apparent place for a fraction of the year 1865 +n, we interpolate log a, b, c, d for the time 1865 +n+t, and we shall have (a° being A.R. for 1865),

OF THE

ASTRONOMICAL OBSERVATORY OF HARVARD COLLEGE.

VOL. IV. PART II.

OBSERVATIONS IN RIGHT ASCENSION OF 505 STARS.

PRINTED FROM THE STURGIS FUND.

CAMBRIDGE:

PRESS OF JOHN WILSON AND SON.

1