Ladenburg's "Entwickelungsgeschichte der Chemie."

Wurtz's "History of the Atomic Theory."

Watts's "Dictionary of Chemistry."

Whewell's "History of the Inductive Sciences."

Rodwell's "Birth of Chemistry;" "Inquiry into the Hermetic Mystery and Alchemy" (London, 1850); "Popular Treatises on Science written during the Middle Ages," edited for the Historical Society of Science by Thomas Wright, M.A. (London, 1841); "Ripley Reviv'd; or, An Exposition upon Sir George Ripley's Hermetico-Poetical Works," by Eirenæus Philalethes (London, 1678); "Tripus Aureus, hoc est Tres Tractates Chymici Selectissimi" (Frankfurt, 1618).

"Alchemy;" article in "Encyclopædia Britannica."

Boyle's "Sceptical Chymist."

"Biographie Universelle;" for notices of Berzelius and Lavoisier.

"English Cyclopædia;" for notices of Black, Berzelius and Lavoisier.

Black's "Lectures," with Memoir: edited by Dr. Robinson.