On the Relations of Man to the Lower Animals
By Thomas Henry Huxley
On the Red Chalk of England
By Thomas Wiltshire
On the Portraits of English Authors on Gardening, – with Biographical Notices of Them, 2nd edition, with – considerable additions
By Samuel Felton
On the Origin of Species by Means of Natural Selection. or the Preservation of Favoured Races in the Struggle for Life. (2nd edition)
By Charles Darwin
On the origin and metamorphoses of insects (Nature series)
By John Lubbock
On the Old Road Vol. 1 (of 2) – A Collection of Miscellaneous Essays and Articles on Art and Literature
By John Ruskin
On the Nature of Thought – or, The act of thinking and its connexion with a perspicuous sentence
By John Haslam
Galen: On the Natural Faculties (Loeb Classical Library)
By Galen
On The Mexican Highlands, With A Passing Glimpse Of Cuba
By
On the Cattle Plague: Or, Contagious Typhus in Horned Cattle. Its History, Origin, Description, and Treatment
By
