| title | creator | language | description | tableOfContents | contributor | subject | created |
| The Beauties of Nature
and the Wonders of the World We Live In | Lubbock, John, Sir, 1834-1913 | en | | | | Natural history; Physical geography; Astronomy | 2009-03-08 |
| On the origin of species | Darwin, Charles, 1809-1882 | en | See also PG#1228 for the First Edition | | | Evolution (Biology); Natural selection | 1999-12-01 |
| Natural History of the Mammalia of India and Ceylon | Sterndale, Robert Armitage, 1839-1902 | en | | | | Mammals -- India; Mammals -- Sri Lanka | 2006-10-16 |
| On the origin of species | Darwin, Charles, 1809-1882 | en | See also PG#2009 for the 6th Edition | | | Evolution (Biology); Natural selection | 1998-03-01 |
| The Sympathy of Religions | Higginson, Thomas Wentworth, 1823-1911 | en | | | | Religions; Natural theology | 2008-06-14 |
| More Science From an Easy Chair | Lankester, E. Ray (Edwin Ray), Sir, 1847-1929 | en | | | | Science; Natural history | 2008-10-24 |
| Country Walks of a Naturalist with His Children | Houghton, W. (William), 1828-1895 | en | | | | Natural history -- Juvenile literature; Nature study -- Juvenile literature | 2007-12-20 |
| Reise in die Aequinoctial-Gegenden des neuen Continents. Band 3. | Humboldt, Alexander von, 1769-1859 | de | | | | Natural history -- South America; South America -- Description and travel | 2009-03-08 |
| Aventures d'un jeune naturaliste. English | Biart, Lucien, 1829-1897 | en | | | Gillmore, Parker [Editor] | Natural history -- Mexico; Mexico -- Description and travel | 2008-07-08 |
| Erklärung der Menschen- und Bürgerrechte. English | Jellinek, Georg, 1851-1911 | en | | | Farrand, Max, 1869-1945 [Translator] | Natural law; Constitutional history -- United States; Constitutional history -- France | 2009-08-26 |
| Conservation Reader | Fairbanks, Harold W. (Harold Wellman), 1860- | en | | | | Natural resources; Forests and forestry -- United States | 2008-10-16 |
| Was Man Created? | Mott, Henry A. (Henry Augustus), 1852-1896 | en | | | | Creation; Evolution; Human beings -- Origin; Natural selection | 2009-11-08 |
| A Theory of Creation: A Review of 'Vestiges of the Natural History of Creation' | Bowen, Francis, 1811-1890 | en | | | | Evolution (Biology); Chambers, Robert, 1802-1871. Vestiges of the natural history of creation; Creation | 2008-02-19 |
| Of Natural and Supernatural Things
Also of the first Tincture, Root, and Spirit of Metals and Minerals, how the same are Conceived, Generated, Brought forth, Changed, and Augmented. | Basilius Valentinus | en | | | Cable, Daniel [Translator] | Alchemy -- Early works to 1800; Antimony -- Therapeutic use -- Early works to 1800 | 2008-08-17 |
| Life and Perambulations of a Mouse | Kilner, Dorothy, 1755-1836 | en | | | | Mice -- Juvenile fiction; Natural history -- Juvenile fiction | 1999-09-01 |
| Sermons to the Natural Man | Shedd, William G. T. (William Greenough Thayer), 1820-1894 | en | | | | | 2004-08-17 |
| My Garden Acquaintance | Lowell, James Russell, 1819-1891 | en | | | | Natural history; Essays | 1997-04-01 |
| Charley's Museum
A Story for Young People | Unknown | en | | | | Natural history -- Juvenile literature; Collectors and collecting -- Juvenile literature | 2007-12-05 |
| For the Term of His Natural Life | Clarke, Marcus Andrew Hislop, 1846-1881 | en | | | | Australia -- Fiction; Prisoners -- Fiction; Penal colonies -- Australia -- Fiction | 2002-09-01 |
| The Malay Archipelago, the land of the orang-utan and the bird of paradise; a narrative of travel, with studies of man and nature — Volume 1 | Wallace, Alfred Russel, 1823-1913 | en | | | | Natural history -- Malay Archipelago; Ethnology -- Malay Archipelago; Malay Archipelago -- Description and travel | 2001-02-01 |
| The Malay Archipelago, the land of the orang-utan and the bird of paradise; a narrative of travel, with studies of man and nature — Volume 2 | Wallace, Alfred Russel, 1823-1913 | en | | | | Natural history -- Malay Archipelago; Ethnology -- Malay Archipelago; Malay Archipelago -- Description and travel | 2001-03-01 |
| Friends in Feathers and Fur, and Other Neighbors
For Young Folks | Johonnot, James, 1823-1888 | en | | | | Zoology -- Juvenile literature; Natural history -- Juvenile literature; Animals -- Juvenile literature; Birds -- Juvenile literature | 2009-02-14 |
| The Heart of Nature
or, The Quest for Natural Beauty | Younghusband, Francis Edward, Sir, 1863-1942 | en | | | | Natural history -- Himalaya Mountains; Nature (Aesthetics); Himalaya Mountains -- Description and travel | 2008-11-09 |
| Wake-Robin | Burroughs, John, 1837-1921 | en | | The return of the birds -- In the hemlocks -- The Adirondacks -- Birds'-nests -- Spring at the capital -- Birch browsings -- The bluebird -- Invitation. | | Natural history -- Outdoor books; Birds -- United States | 2003-07-01 |
| The Number "e" | Unknown | en | Natural Log | | | | 1993-04-01 |