made by the lunar tables;
but these, being found unreliable, were eventually discontinued.

To return to Harrison. He continued to be worried by official
opposition. His claims were still unsatisfied. His watch at home
underwent many more trials. Dr. Maskelyne, the Royal Astronomer, was
charged with being unfavourable to the success of chronometers, being
deeply interested in finding the longitude by lunar tables; although
this method is now almost entirely superseded by the chronometer.
Harrison accordingly could not get the certificate of what was due to
him under the Act of Parliament. Years passed before he could obtain
the remaining amount of his reward. It was not until the year 1773, or
forty-five years after the commencement of his experiments, that he
succeeded in obtaining it. The following is an entry in the list of
supplies granted by Parliament in that year: "June 14. To John
Harrison, as a further reward and encouragement over and above the sums
already received by him, for his invention of a timekeeper for
ascertaining the longitude at sea, and his discovery of the principles
upon which the same was constructed, 8570 pounds 0s. 0d."

John Harrison did not long survive the settlement of his claims; for he
died on the 24th of March, 1776, at the age of eighty-three. He was
buried at the south-west corner of Hampstead parish churchyard, where a
tombstone was erected to his memory, and an inscription placed upon it
commemorating his services. His wife survived him only a year; she
died at seventy-two, and was buried in the same tomb. His son, William
Harrison, F.R.S., a deputy-lientenant of the counties of Monmouth and
Middlesex, died in 1815, at the ripe age of eighty-eight, and was also
interred there. The tomb having stood for more than a century, became
somewhat dilapidated; when the Clock-makers' Company of the City of
London took steps in 1879 to reconstruct it, and recut the
inscriptions. An appropriate ceremony took place at the final
uncovering of the tomb.

But perhaps the most interesting works connected with John Harrison and
the great labour of his life, are the wooden clock at the South
Kensington Museum, and the four chronometers made by him for the
Government, which are still preserved at the Royal Observatory,
Greenwich. The three early ones are of great weight, and can scarcely
be moved without some bodily labour. But the fourth, the marine
chronometer or watch, is of small