[366] This refers to the Vernier pendulum, spoken of at length in the “Prefatory Memoir.”
[367] “History of England.” Vol. V., p. 96.
[368] “Whiteladies.” Vol. II., p. 37.
[369] Vol. I., p. 133. First Edition.
[370] Vol. II. p. 41. First Edition.
[371] Report of the thirty-fifth meeting of the British Association, p. 52.
[372] Sir John Herschel, by very careful experiments, found that, when the temperature of the air is 62° of Fahrenheit, the rate of progress is 1125 per second. This is a mile in 4·7 seconds.
[373] The usual mode of dating astronomical papers. See the Astronomer Royal’s reply.
[374] June, 1874.
[375] “Monthly Notices,” Vol. XXVI., p. 157.