The silhouette illustration of the man petting the cat walking in "How Cats Came to Purr."
"Vorticella. A, B, living specimens in different positions; C, optical section; D1, D2, diagrams illustrating…
"General view of the viscera of a male frog, from the right side. a, stomach; b, urinary bladder; c,…
"Stages in the development of Laomedea; A-F stages in segmentation; G, the planula enclosed in the maternal…
"Ophioglypha lacertosa. A, outline, of the natural size; B, central disc, dorsal view; C, the disc,…
"Lumbricus agricola. A, entire specimen, lateral view; B, ventral view of anterior portion of the body,…
"Head of Hirudo medicinalis, showing the three jaws (k); b, one of the jaws isolated, with the finely…
"Periplaneta. View of the arrangement of the principal trunks of the tracheal system." -Parker, 1900
"Periplaneta. General view of the nervous system. abd. 6, sixth abdominal ganglion; ant, antennary nerve;…
"Cypraea moneta (Cowrie). Showing the mantle, provided with marginal tentacles, partly enveloping the…
"Spirula peronii, lateral view. d, terminal sucker; f, funnel; s1, s2, projecting portions of the shell,…
"Diagram of the metamorphosis of the free, tailed larva into the fixed Ascidian. A, stage of free-swimming…
"Amphioxus lanceolatus. A, ventral; B, side view of the entire animal. an, anus; atrp, atriopore; cd.…
"Lacerta agilis. General view of the viscera in their naturaal relations. Bl, urinary bladder; Ci, post-caval…
"A, lateral view of skull of rattlesnake (Crotalus). B. O, basi-occipital; B. S, basi-sphenoid; E. O,…
"Lepus cuniculus. Brain. A, dorsal view; B, ventral; b. o, olfactory lobe; cb', median lobe of cerebellum…
"a Lepidodendron (restored); b & c impressions on back; d stem with leaves; e leaflet; f fruit of Lepidodendron,…
Perhaps the earliest people to form real cities in the western region of the world, were a people of…
"Accessory buds of box-elder (Negundo). A, front view of group; B, two groups seen in profile." -Bergen,…
A freshwater hydra, magnified. Example of an animal with no skeleton. There are animals without a skeleton…
Philip became king of Macedonia in 359 B.C. He was viewed as he best educated man of his time.
Alexander the Great's head on a silver coin of Lysimachus in 321-281 B.C.
"Leaves standing nearly vertical in compass-plant. (Silphium laciniatum). A, view from east or west;…
"Irregular corolla of sweet pea. A, side view; B, front view. s, standard; w, w, wings; k, keel." -Bergen,…
Drawing of Tsar Alexander I. He was Emperor of Russia, King of Poland, and first Grand Duke of Finland.
"Parts of a stamen. A, front; B, back. a, anther; c, connective; f, filament." -Bergen, 1896
Wolves attacking a traveler. Caption below illustration: "The road now ran along the skirts of a pine…
The torture of a free mason. Caption below illustration: "They next set my back against a thick board,…
"Head of yarrow. A, top view; B, lengthwise section. re, receptacle; i, involucre; r, ray-flowers; d,…
"Scotch Pine (P. slvestris). 1, a twig showing: a, staminate catkins; b, pistillate catkins; c, a cone;…
A pie graph of "Proportion of World's Supply of Cotton contributed by each country" labeled with country…
Illustration of stairs; 3-dimensional view of 4 steps. The staircase can be created by combining/stacking…
Illustration of an oblique view of a rectangular solid/prism at 30°.
Illustration of an oblique view of a rectangular solid/prism at 45°.
Illustration of an oblique view of a rectangular solid/prism at 60°.
Illustration of an oblique view of a hollow cylinder. The portion removed from the center of the cylinder…
"Great wall of China: 20 feet high, 40 feet wide, 800 miles long." -Foster, 1921
"The great Bartholdi statue, 'Liberty Enlightening the World,' erected upon Bedloe's Island in New York…