It is to be seen at the Museum of Patents, South Kensington; and when we visited it a few months ago it was going, and still marking the moments as they passed.

It is contained in a case about six feet high, with a glass front, showing a pendulum and two weights.

Over the clock is the following inscription: "This clock was made at Barrow, Lincolnshire, in the year 1715, by John Harrison, celebrated as the inventor of a nautical timepiece, or chronometer, which gained the reward of 20,000L., offered by the Board of Longitude, A.D.

1767.
"This clock strikes the hour, indicates the day of the month, and with one exception (the escapement) the wheels are entirely made of wood." This, however, was only a beginning.

Harrison proceeded to make better clocks; and then he found it necessary to introduce metal, which was more lasting.