As those times of passing from one wire to another are usually given to seconds and tenths of seconds, it rarely happens that the accordance is perfect.
The transit instrument used by Captain Sabine was thirty inches in length, and the wires are stated to be equi-distant.

Out of about 370 transits, there are eighty-seven, or nearly one-fourth, which have the intervals between all the wires agreeing to the same, the tenth of a second.

At Sierra Leone, nineteen out of seventy-two have the same accordance; and of the moon culminating stars, p.

409, twelve out of twenty-four are equally exact.

With larger instruments, and in great observatories, this is not always the case.
Captain Kater has given, in the Philosophical Transactions, 1819, p.
427, a series of transits, with a three and a half foot transit, in which about one-eleventh part of them only have this degree of accuracy; and it should be observed that not merely the instrument, but the stars selected, have, in this instance, an advantage over Captain Sabine's.
The transit of M.Bessel is five feet in length, made by Frauenhofer, and the magnifying power employed is 182; yet, out of some observations of his in January, 1826, only one-eleventh have this degree of accordance.