THE YEAR-BOOK OF FACTS, 1840.

Exhibiting the most important Discoveries and Improvements in Science and Art of the present Year, in

MECHANICS.
NATURAL PHILOSOPHY.
ELECTRICITY.
CHEMISTRY.
ZOOLOGY.
BOTANY.
GEOLOGY.
MINERALOGY.
ASTRONOMY.
METEOROLOGY.
GEOGRAPHY.
ETC. ETC.

By the Editor of “The Arcana of Science.”

“To bring Facts together, so as to enable us to grasp with new and greater generalisations.” —Professor Sedgwick.

(Will appear early in January.)