| Clever Hans (The Horse of Mr. Von Osten) / A contribution to experimental animal and human psychology
Oskar Pfungst | |
| Cliff Castles and Cave Dwellings of Europe
S. Baring-Gould | |
| Cliff Dwellings of the Mesa Verde: A Study in Pictures
Don Watson | |
| Cliges: A Romance
active 12th century de Troyes Chrétien | |
| Climate and Health in Hot Countries and the Outlines of Tropical Climatology / A Popular Treatise on Personal Hygiene in the Hotter Parts of the World, and on the Climates That Will Be Met Within Them.
George Michael James Giles | |
| Climate and Time in Their Geological Relations / A Theory of Secular Changes of the Earth's Climate
James Croll | |
| Climate—disordered
Sam Merwin | |
| Climatic Changes: Their Nature and Causes
Ellsworth Huntington; Stephen Sargent Visher | |
| Climbing in The British Isles, Vol. 2 - Wales and Ireland
W. P. Haskett Smith; Henry Chichester Hart | |
| Climbing in The British Isles. Vol. 1 - England
W. P. Haskett Smith |
