Nursery rhymes combined: One of Old King Cole's fiddlers talking to Little Jack Horner.
The convergence of light rays in the eyeball begins in the aqueous humor is perfected in the crystalline.…
Nicaragua Official Envelope (value unknown) from 1890
Orange Free State Revenue Stamp (1 shilling) from 1882
A man exercising with chest weights. In this position, he is pulling straight back, alternating right…
A man exercising with chest weights. In this position, he is extending his right arm across his back…
A man exercising with chest weights. In this position, he is extending his left arm across his back…
A man exercising with chest weights. In this position, he gently moves his head forward and back.
A man exercising with chest weights. In this position, he extends his left leg forward and then bends…
A man exercising with chest weights. In this position, he extends his left leg forward and then bends…
A man exercising with chest weights. In this position, he pulls his arms down and back, alternately…
The cow knocks down the dungeon wall with her horns to free Hans. This knocks his hat off but he quickly…
"Profile of a dune, from back to front, showing its relation to the wind. The flow-lines of air are…
"Diagram of the progress of a dune, from a to be. The arrow flies with the wind. A live tree standing…
"Schematic sectional view of a connector well between nonartesian and Floridan aquifers." -Knochenmus,…
This diagram shows the translation from the profile of an incline to the contours in an above view.
"Tobacco split worm: adult moth above; larva below at right; pupa below at left, with side view of enlarged…
"The cigarette beetle: a, larva; b, pupa; c, adult; d, side view of adult; e, antenna." -Department…
"Heliothis armiger: a moth; b, dark larva; c, lighter larva entering pod; d, pupa; e, last segment of…
The cross section view of the steel-track wagon road built on country roads for "cheapness, durability,…
"Sectional view of perfumery still: a, b, junction between head (which is lifted for admission and withdrawal…
"B, older (onion) cells farther back from the root tip. The cytoplasm is becoming vacuolate; f, vacuole."…
"Free cell formation of spores in the ascus of Erysiphe communis. A, ascus with single nucleus; C, cytoplasm;…
"B, diagram of vascular bundles in external view and in cross section of the stem of Cerastium. The…
"Diagrammatic representation of a block of pine wood highly magnified. a, Early growth; b, late growth;…
A: "Camera-lucida drawing of a bleached leaf of a Dicotyledon, showing the course of the vascular bundles,…
"A typical stoma in cross section and surface view combined. k, guard cell; j, the gap or stoma between…
"Portion of leaf of Sphagnum, in cross section on the left, and surface view on the right. h, hole through…
"Cross section, A, and surface view, B, of a leaf of common moss, showing chloroplasts, c." -Stevens,…
"One third of the sea bottom is covered with a soft gray ooze or mud made up entirely of the shells…
"1. Lower mandible. 2. Upper mandible. 3. Forehead. 4. Loral space. 5. Crown of the head. 6. Hind part…
"The horizontal direction of the wind is usually observed by means of an instrument called the arrow…
Illustration of a child buying doll clothes. It can be used to write mathematics story problems involving…
Illustration of a child buying doll toys. It can be used to write mathematics story problems involving…
Illustration of a child buying toys. It can be used to write mathematics story problems involving addition,…
Illustration of a child buying groceries. It can be used to write mathematics story problems involving…
Illustration of a group of toys. It can be used to write mathematics story problems involving addition,…
Illustration of a group of toys. It can be used to write mathematics story problems involving addition,…