The size of each sheep is proportional to the number raised in the five leading sheep-raising states, 1919–1920: A, Wyoming (3,600,000); B, Idaho (3,070,000); C, Ohio (2,960,000); D, California (2,940,000); E, New Mexico (2,670,000). Human Geography. 1921. Internet Archive
nemfrog : Myths of China and Japan. 1923. Cover detail. Internet Archive
nemfrog : “Fairy ring formed by Marasmius oreades , an edible toadstool.” A text-book of mycology and plant pathology. 1917. Internet Archive
Saturn and its rings, sectional view. Moses and geology. 1892. Internet Archive
Spiky pollen grains. Ueber den Pollen . (About Pollen.) 1837. Internet Archive
Reddy Fox chases Peter Rabbit. Up one pair of stairs of my book house. 1920. Illustration by M.D. Charleson. Internet Archive
Landscape with snail. Scènes comique dan la forêt. 1921. Benjamin Rabier, illustrator. Internet Archive
The city of the 21st century, depicted over 100 years ago. Illustrated by Ernst Lübbert. Die Welt in hundert Jahren . 1910. Internet Archive
Total eclipse. Our Wonder World, A Library Of Knowledge. 1930. Internet Archive
Earth “as it may possibly be seen from Mars or Venus.” Our Wonder World, A Library Of Knowledge. 1930. Internet Archive
“Isostasy. The weight of the sediments causes the underlying rock to flow.” Physical Science for Secondary Schools. 1962. Internet Archive
“In the Milky Way’s wall of stars, wide gaps open onto infinity.” Die Welt in hundert Jahren . (The world in a hundred years.) 1910. Internet Archive
White Pond, Concord, Massachusetts. Walden, or, Life in the woods. 1909. Internet Archive
nemfrog : Stars and dots. Our Earth and Its Story - Volume VI. 1932.
nemfrog : A bee by Benjamin Rabier. Scènes de la vie privée des animaux. 1900.
nemfrog : A plain and easy account of the British fungi . 1871. Internet Archive
nemfrog : Swirling water pattern. . Kata-gami : Japanese stencils in the collection of the Cooper-Hewitt Museum. 1979. Internet Archive
Advertising art for “The Book of Torture.” Found in The Art of Kissing. n.d. Internet Archive
“Eat thou honey because it is good.” Facts about honey. 1916. Internet Archive
Tarantuala. Science Gossip. September 1896. Internet Archive