"Two cylinders, one horizontal, the other perpendicular. The base of the horizontal cylinder is at one angle of 40° with the PP. The sun's inclination 50°m elevation 28°." (Britannica, 1891)

Shadows of Two Cylinders

"Two cylinders, one horizontal, the other perpendicular. The base of the horizontal cylinder is at one…

The dorsal view of the larva of the Tawny Emperor (Asterocampa clyton), a brush-footed butterfly.

Emperor Butterfly Larva

The dorsal view of the larva of the Tawny Emperor (Asterocampa clyton), a brush-footed butterfly.

The lateral view of the pupa of the Tawny Emperor (Asterocampa clyton), a brush-footed butterfly.

Emperor Butterfly Pupa

The lateral view of the pupa of the Tawny Emperor (Asterocampa clyton), a brush-footed butterfly.

"Inside View of Shield, showing Enarme, or Gear. Enarmer, provide, as a shield, with straps." -Whitney, 1911

Enarme

"Inside View of Shield, showing Enarme, or Gear. Enarmer, provide, as a shield, with straps." -Whitney,…

"Diagram of Vertebrate Encephalon ... in longitudinal vertical section. Mb, mid-brain; in front of it all is forebrain, behind it all is hind-brain; laminaterminalis, represented by the heavy black line in upper figure; Olf, olfactory lobes; Hmp, cerebral hemispheres; ThE, thalamencephalon; Py, pituitary body; FM, foramen of Monro; CS, corpus striatum; Th, optic thalamus; CQ, corpora quadrigemina; CC, crura cerebri; Cb, cerebellum; PV, pons Varolii; MO, medulla oblongata; I, olfactory nerves; II, optic nerves; III, point of ext from brain of the oculimotores; IV, of the pathetici; VI, of the abducentes; V-XII, origins of other cerebral nerves; 1, olfactory ventricle; 2, lateral ventricle; 3, third ventricle; 4, fourth ventricle." -Whitney, 1911

Encephalon

"Diagram of Vertebrate Encephalon ... in longitudinal vertical section. Mb, mid-brain; in front of it…

"Diagram of Vertebrate Encephalon ... in horizontal section. Mb, mid-brain; in front of it all is forebrain, behind it all is hind-brain; Lt, laminaterminalis; Olf, olfactory lobes; Pn, pineal body, or conarium; M, foramen of Monro; CS, corpus striatum; Th, optic thalamus; Cb, cerebellum; MO, medulla oblongata; I, olfactory nerves; II, optic nerves; 1, olfactory ventricle; 2, lateral ventricle; 3, third ventricle; 4, fourth ventricle; + is in the iter e tertio ad quartum ventriculum." -Whitney, 1911

Encephalon

"Diagram of Vertebrate Encephalon ... in horizontal section. Mb, mid-brain; in front of it all is forebrain,…

"Anterior View, Distal End, of Right Humerus of a Man. H, humerus; epc, epicondyle, or external supracondyloid protuberance; ept, epitrochlea, or internal supracondyloid protuberance; cp, capitellum, or convex articular suface for head of radius; tr, trochlea, or transversely concave articular surface for the ulna; epc and cp are together the ectocondyle, and ept and tr are together the entocondyle." -Whitney, 1911

Humerus

"Anterior View, Distal End, of Right Humerus of a Man. H, humerus; epc, epicondyle, or external supracondyloid…

Also known as fish lice, this is a species of copepod, a parasitic crustacean. "Female of Chondracathus gibbosus, enlarged; and example of the crustaceous Epizoa. A, lateral view." -Whitney, 1911

Copepod

Also known as fish lice, this is a species of copepod, a parasitic crustacean. "Female of Chondracathus…

Also known as fish lice, this is a species of copepod, a parasitic crustacean. "Female of Chondracathus gibbosus, enlarged; and example of the crustaceous Epizoa. B, ventral view; a, head; b, c, appendages; d, d, mediodorsal processes; e, e, medioventral processes; f, i, h, lateral processes; g, ovisacs; k, terminal segment; l, minute male lodged in vulva of female; m, n, mediodorsal ovarian tubes; p, lateral ovarian tubes; o, o, oviduct; 2, 3, antennules; 4, 5, 6, antennae, gnathites." -Whitney, 1911

Copepod

Also known as fish lice, this is a species of copepod, a parasitic crustacean. "Female of Chondracathus…

An illustration of a microscopic view under the surface of a young prothallus: pr, prothallus; w, root-hairs; an, antheridia; ar, archegonia. A prothallium, or prothallus is usually a pteridophyte, i.e. spore-bearing plant, (almost exclusively ferns) in gametophyte stage in the alternation of generations cycle.

Young Prothallus of Fern

An illustration of a microscopic view under the surface of a young prothallus: pr, prothallus; w, root-hairs;…

An illustration of a screw, which is incline plane wrapped around a cyclinder.

Screw

An illustration of a screw, which is incline plane wrapped around a cyclinder.

An illustration of a screw, which is incline plane wrapped around a cyclinder.

Screw

An illustration of a screw, which is incline plane wrapped around a cyclinder.

The ventral and dorsal view of the pupa of Erotylus boisduvali, a fungus beetle.

Fungus Beetle Pupa

The ventral and dorsal view of the pupa of Erotylus boisduvali, a fungus beetle.

A windlass is an apparatus for moving heavy weights. Typically, a windlass consists of a horizontal cylinder (barrel), which is rotated by the turn of a crank or belt. A winch is affixed to one or both ends, and a cable or rope is wound around the winch, pulling a weight attached to the opposite end.

Chinese Windlass

A windlass is an apparatus for moving heavy weights. Typically, a windlass consists of a horizontal…

General view, in part schematic, of the volcanic massif of the Mezenc.

Volcanic Massif of the Mezenc

General view, in part schematic, of the volcanic massif of the Mezenc.

General view, in part schematic, of the "Bassin du Puy" and the "Chaine du Velay" or "Chaine du Deves," Central France.

Bassin du Puy

General view, in part schematic, of the "Bassin du Puy" and the "Chaine du Velay" or "Chaine du Deves,"…

A typical foraminiferal shell shaped more or less like a football in form (diagrammatical view).

Schwagerina Verbecki

A typical foraminiferal shell shaped more or less like a football in form (diagrammatical view).

Here is a bungalow style, two story farmhouse nestled amongst the trees. There is a typical hipped roof, with gabled windows. The roof over the front porch is supported by four columns and two pilasters. In 1917, this house cost about $2,400 to build.

"The Adele"

Here is a bungalow style, two story farmhouse nestled amongst the trees. There is a typical hipped roof,…

"Cartilaginous Cranium of the Pike (Esox lucius), with its intrinsic ossifications. A, top view; 3, small ossifications in the rostrum; N, N, nasal fossae; I Or, interorbital septum; Eth, ethmoid; Prf, Ptf, prefrontal and postfrontal; EpO, epiotic; OpO, opisthotic; Pt, pteriotic; EO, exoccipital." -Whitney, 1911

Pike Cranium

"Cartilaginous Cranium of the Pike (Esox lucius), with its intrinsic ossifications. A, top view; 3,…

"Cartilaginous Cranium of the Pike (Esox lucius), with its intrinsic ossifications. B, side view: V, VII, exits of trigeminal and of pneumogastric nerves; 3, small ossifications in the rostrum; I Or, interorbital septum; Eth, ethmoid; Prf, Ptf, prefrontal and postfrontal; PrO, proötic; EpO, epiotic; OpO, opisthotic; Pt, pteriotic; EO, exoccipital; BO, basioccipital; BS, basisphenoid; AS, alisphenoid." -Whitney, 1911

Pike Cranium

"Cartilaginous Cranium of the Pike (Esox lucius), with its intrinsic ossifications. B, side view: V,…

Ammonite, side view. Where the shell has been partly worn away near the aperture, the complex "suture line" is shown.

Ammonite

Ammonite, side view. Where the shell has been partly worn away near the aperture, the complex "suture…

A cross sectional view of a bell.

Cross Section of a Bell

A cross sectional view of a bell.

A common form of brittle star, dorsal view.

Brittle Star

A common form of brittle star, dorsal view.

Illustration of a frustum of a pyramid having a rectangular base and a hole passing through the center of the frustum.

Frustum Of A Rectangular Pyramid With Hole

Illustration of a frustum of a pyramid having a rectangular base and a hole passing through the center…

Illustration of the projection of a cylinder.

Projection Of Cylinder

Illustration of the projection of a cylinder.

Illustration of the projection of a cylinder whose axis is parallel to the plane of the paper and makes an angle of 77° with the horizontal.

Projection Of Cylinder

Illustration of the projection of a cylinder whose axis is parallel to the plane of the paper and makes…

Illustration of a cylinder cut by a plane making an angle of 57° with the base.

Plane Intersecting A Cylinder

Illustration of a cylinder cut by a plane making an angle of 57° with the base.

Illustration of the projection of a cylinder that is rightly inclined.

Projection Of Cylinder

Illustration of the projection of a cylinder that is rightly inclined.

Illustration of the projection of a cylinder that is obliquely inclined.

Projection Of Cylinder

Illustration of the projection of a cylinder that is obliquely inclined.

The blueprints of "The Adele" clearly show the large bay window in the dining area. There is also a large front porch and a smaller porch extending off the back of the house. In 1917, this house cost about $2,400 to build.

"The Adele" Floor Plans

The blueprints of "The Adele" clearly show the large bay window in the dining area. There is also a…

Here is a small, one bedroom bungalow style house. Is has a hipped roof with a gabled window in the front. Two chimneys protrude from the roof. In 1917, this house cost about $500 to build.

"The American"

Here is a small, one bedroom bungalow style house. Is has a hipped roof with a gabled window in the…

The floor plan shows a small porch at the front of the house. A small bedroom is accompanied by a walk-in closet as the kitchen has a walk-in pantry. In 1917, this bungalow style one story house cost about $500 to build.

"The American" Floor Plans

The floor plan shows a small porch at the front of the house. A small bedroom is accompanied by a walk-in…

A three story Queen Anne Victorian style house. This house includes the typical, round tower associated with this style. A window is situated at the end of the gabled roof. A covered porch leads to the front door. A bit of smoke can be seen coming from the chimney. There is a vine creeping up the side of the house as well. In 1917, this house cost between $4,300 and $4,500 to build.

"The Asbury"

A three story Queen Anne Victorian style house. This house includes the typical, round tower associated…

The floor plan of this three story Queen Anne Victorian style house shows the openness of this large house. This view also reveals a small back porch called a sloop. The directionality of the stairs indicate that a basement was also included with this house. In 1917, this house cost between $4,300 and $4,500 to build.

"The Asbury" Floor Plans

The floor plan of this three story Queen Anne Victorian style house shows the openness of this large…

Here is a three story Victorian style house. It is indicative with its textured shingles that avoid a smooth-wall appearance. There is also an irregularly shaped roof above the front porch. Two chimney stacks stick up from the gabled roof. In 1917, this house cost between $2,800 and $3,000 to build depending on the locality.

"The Atlantic"

Here is a three story Victorian style house. It is indicative with its textured shingles that avoid…

The floor plan shows more detail on the interior of the house. From this view can be seen the large bay window that protrudes from the dining room. There is a fireplace in the parlor. The kitchen has a large walk-in pantry attached. The three bedrooms are all located on the second floor. The master chamber includes an alcove to provide more space than the other rooms along with a walk-in closet. In 1917, this house cost between $2,800 and $3,000 to build depending on the locality.

"The Atlantic" Floor Plans

The floor plan shows more detail on the interior of the house. From this view can be seen the large…

A classic example of a Queen Anne Victorian style house. A large chimney protrudes from the steep hipped roof. The typical round tower can be seen on the left most side of the house. Rounded bay windows extend from the right side of the house on the first and second floors. A dormer window can be found on the top floor of the tower. A small porch extends from the front of the house. In 1917, this large house cost between $4,000 and $4,250 to build depending on the locality.

"The Badenoch"

A classic example of a Queen Anne Victorian style house. A large chimney protrudes from the steep hipped…

The entrance to this house is labeled a vestibule, to elicit a sense of grandeur. The round tower can be clearly seen from this perspective. A fireplace is situated at the base of the tower in the parlor room. The sitting room contains a large bay window, as well a fireplace. The dining room also has a bay window, although this one is much rounder. The kitchen is situated at the back of the house and exits to a small back porch. An elegant stair case can be found at the front of the house that leads all the way to the third floor. A smaller staircase is located in the kitchen and stops at the second floor. On the second floor there are four large chambers, three with closets, and a single bathroom. In 1917, this large house cost between $4,000 and $4,250 to build depending on the locality.

"The Badenoch" Floor Plans

The entrance to this house is labeled a vestibule, to elicit a sense of grandeur. The round tower can…

There is a variation of the bay window on the front of this house. A quaint porch leads to the front door. A section juts out from the right side of the house. In this illustration, there are many trees and shrubs decorating the landscaping. In 1917, this medium-sized house cost between $2,600 and $2,800 to build depending on the locality.

"The Baldwin"

There is a variation of the bay window on the front of this house. A quaint porch leads to the front…

From this angle it is easy to see the bay window at the front of the house. A large fireplace is situated along the right wall of the parlor. The kitchen has a walk-in pantry. The sitting room is large and extends the wall of the house, giving it character. The master bedroom on the second floor has a large walk-in closet. In 1917, this medium-sized house cost between $2,600 and $2,800 to build depending on the locality.

"The Baldwin" Floor Plans

From this angle it is easy to see the bay window at the front of the house. A large fireplace is situated…

Illustration of the intersection of an octagonal prism and a cylinder. The figures intersect at an oblique angle.

Intersecting Prism and Cylinder

Illustration of the intersection of an octagonal prism and a cylinder. The figures intersect at an oblique…

Illustration of the intersection of 2 cylinders of equal diameter.

Intersecting Cylinders

Illustration of the intersection of 2 cylinders of equal diameter.

Illustration of the intersection of 2 cylinders of equal diameter.

Intersecting Cylinders

Illustration of the intersection of 2 cylinders of equal diameter.

Illustration of the intersection of 3 cylinders of equal diameter.

Intersecting Cylinders

Illustration of the intersection of 3 cylinders of equal diameter.

Illustration of the intersection of 2 cylinders of equal diameter.

Intersecting Cylinders

Illustration of the intersection of 2 cylinders of equal diameter.

Illustration of the intersection of 2 cylinders of unequal diameter.

Intersecting Cylinders

Illustration of the intersection of 2 cylinders of unequal diameter.

Illustration of the intersection of a cylinder and a sphere.

Intersecting Cylinder and Sphere

Illustration of the intersection of a cylinder and a sphere.

Illustration of the intersection of a cylinder and a sphere.

Intersecting Cylinder and Sphere

Illustration of the intersection of a cylinder and a sphere.

Illustration of the development of a cylinder. The cylinder is covered with paper (a) and then rolled out (b) showing the outer edges are parallel.

Development Of Cylinder

Illustration of the development of a cylinder. The cylinder is covered with paper (a) and then rolled…

Illustration of the intersection of 3 cones.

3 Intersecting Cones

Illustration of the intersection of 3 cones.

Illustration showing the intersection of a plane with a cylinder.

Plane Intersecting Cylinder

Illustration showing the intersection of a plane with a cylinder.

Illustration showing the intersection of two intersecting cylinders.

2 Intersecting Cylinders

Illustration showing the intersection of two intersecting cylinders.

The dorsal view of Eurypterus remipes, an extinct sea scorpion from the Silurian period.

Dorsal View of Sea Scorpion

The dorsal view of Eurypterus remipes, an extinct sea scorpion from the Silurian period.

The dorsal view of the Ensign Wasp (Evania laevigata), an insect in the Evaniidae family.

Dorsal View of Ensign Wasp

The dorsal view of the Ensign Wasp (Evania laevigata), an insect in the Evaniidae family.

The dorsal view of the Ground Beetle (Evarthrus orbatus), an insect in the Carabidae family of carabid beetles.

Dorsal View of Ground Beetle

The dorsal view of the Ground Beetle (Evarthrus orbatus), an insect in the Carabidae family of carabid…

Glacier descending into the sea, where its front is buoyed up by the water and becomes broken up into icebergs.

Glacier

Glacier descending into the sea, where its front is buoyed up by the water and becomes broken up into…

"Irrigation by means of check levees for orchards on sloping hillsides (sectional view)." -Department of Agriculture

Irrigation with Check Levees

"Irrigation by means of check levees for orchards on sloping hillsides (sectional view)." -Department…

"Irrigation by means of terraces on steep hillsides (sectional view)." -Department of Agriculture

Irrigation with Terraces

"Irrigation by means of terraces on steep hillsides (sectional view)." -Department of Agriculture

Aerial view of Vera Cruz, Mexico in 1847 showing buildings and the mountainous horizon.

Mexican City of Vera Cruz in 1847

Aerial view of Vera Cruz, Mexico in 1847 showing buildings and the mountainous horizon.

The side view of the compound eye of the housefly.

Compound Eye of Housefly

The side view of the compound eye of the housefly.