CAPTIVE MOLECULES; THE STORY OF THE STEAM-ENGINE
(p. 82). The experiments of Hero of Alexandria. For a full account of
the experiments see vol. I., pp. 249, 250.
(p. 84). The Marquis of Worcester's steam engine. The original account
appeared, as stated, in the Marquis of Worcester's _Century of
Inventions_, published in 1663.
(p. 92). Newcomen's engine. As stated in the text, the account of
Newcomen's engine is quoted from the report of the Department of
Science and Arts of the South Kensington Museum, now officially known
as the Victoria and Albert Museum.
(pp. 107-109). James Watt. The characterization of Watt here given is
taken from an article in an early edition of the Edinburgh Encyclopædia
published about the year 1815.