"Parts shown are handle, A; sleeve, B; safety lock, C; cocking peice, D; safety lug, E; extractor, F; extractor collar, G; locking lugs, H; extractor tongue groove, I, and gas escape hole, J." — Moss, 1914

Bolt Mechanism

"Parts shown are handle, A; sleeve, B; safety lock, C; cocking peice, D; safety lug, E; extractor, F;…

Famous Russian explorer who explored parts of Tunis and Upper Egypt.

Dr. William Junker

Famous Russian explorer who explored parts of Tunis and Upper Egypt.

That part of the limb from the knee to the foot.

Leg

That part of the limb from the knee to the foot.

One of the three principal parts or organs of vegetation, generally flattened in shape, and greenish in color.

Leaf

One of the three principal parts or organs of vegetation, generally flattened in shape, and greenish…

A wheel for transmitting power from, or imparting it to the different parts of machinery, or for changing the direction of motion by means of a belt, cord, or rope.

Pulley

A wheel for transmitting power from, or imparting it to the different parts of machinery, or for changing…

The set of four persons who perform a piece of music in four parts.

Quartet

The set of four persons who perform a piece of music in four parts.

The parts of a flower.

Parts of a flower

The parts of a flower.

"The pulley is a lever with equal arms of the first or second class, but, when it moves. the attachments of the forces are moved. The underlying fact that enables the pulley to afford any mechanical advantage is the uniformity of the tension of the cord in all of its parts, the pulley itself serving only to diminish the friction." — Avery, 1895

Pulley

"The pulley is a lever with equal arms of the first or second class, but, when it moves. the attachments…

"The most essential parts of human vision are contained in the eyeball, a nearly spherical body, about an inch in diameter, and capable of being turned considerably in its socket by the action of various muscles." — Avery, 1895

Eyeball

"The most essential parts of human vision are contained in the eyeball, a nearly spherical body, about…

"An indented parapet, formed by a series of rising parts called cops or merlons, separated by openings called crenelles or embrasures. Originally military, they are now used in buildings for ornament." — Williams, 1889

Battlement

"An indented parapet, formed by a series of rising parts called cops or merlons, separated by openings…

"A four-sided figure, formed of 2 unequal isosceles triangles on different sides of a common base." — Williams, 1889

Deltoid

"A four-sided figure, formed of 2 unequal isosceles triangles on different sides of a common base."…

"The essential parts of an ordinary Wimshurst machine, are two ordinary drums. On each plate are fixed a large number of strips of conducting material which are equal in size and are equally spaced, radially if on a plate, and circumferentially if on a drum." — Hawkins, 1917

Wimshurst Electric Machine

"The essential parts of an ordinary Wimshurst machine, are two ordinary drums. On each plate are fixed…

"Many species of the kingfisher family are found in various parts of the world. The belted kingfisher is peculiar to North America, and is a larger bird than the kingfisher of Great Britain, being fully twelve inches in length, but inferior in brilliancy of plumage." —The Popular Cyclopedia, 1888

Belted Kingfisher

"Many species of the kingfisher family are found in various parts of the world. The belted kingfisher…

A moth of the Cosmia genus; found in all parts of the world.

Moth

A moth of the Cosmia genus; found in all parts of the world.

A type of wolf. About as large as a pointer dog with a full pelage, bushy tail, upright ears, and sharp nose. Usually has a gray coat with parts of red and black.

Coyote

A type of wolf. About as large as a pointer dog with a full pelage, bushy tail, upright ears, and sharp…

A very venomous snake found in the warmer parts of North America.

Serpent

A very venomous snake found in the warmer parts of North America.

Owls can be found in all parts of the world, some as short as five inches long while others are as large as two feet.

Owl

Owls can be found in all parts of the world, some as short as five inches long while others are as large…

If a pyramid be cut by a plan parallel to the base, so as to form two parts, the lower part is called the frustum of the pyramid.

Frustum

If a pyramid be cut by a plan parallel to the base, so as to form two parts, the lower part is called…

"Diagram to show the working parts of a gland. v and a are blood tubes with thin-walled branches around the parts of the gland c. These take material from the blood and, after changing it, send it to the mouth, stomach, or other places before the duct i." —Davison, 1910

Gland

"Diagram to show the working parts of a gland. v and a are blood tubes with thin-walled branches around…

A rodent quadruped found in the northern parts of America and Eurasia, particularly in Norway and Sweden. There are several species. They are allied to the rat and mouse, mostly bownish-black in color, body heavy-set, limbs short, and head large.

Lemming

A rodent quadruped found in the northern parts of America and Eurasia, particularly in Norway and Sweden.…

The popular name of an order of reptiles having four well developed limbs, each terminated by five toes of unequal length, and an elongated body.

Lizard

The popular name of an order of reptiles having four well developed limbs, each terminated by five toes…

A ruminating quadruped closely allied to the camel, and native to the southern parts of Peru and other sections of South America.

Llama

A ruminating quadruped closely allied to the camel, and native to the southern parts of Peru and other…

A plant native to America and Eurasia, and which has a narcotic poison in all of its parts.

Mandrake

A plant native to America and Eurasia, and which has a narcotic poison in all of its parts.

"Diagram of the main parts of a sewerage system." —Kinne, 1920

Sewerage system

"Diagram of the main parts of a sewerage system." —Kinne, 1920

An optical instrument designed to eamine minute objects or parts of objects, and which so magnifies otherwise invisible or indistinct details that their structure or texture may be seen clearly.

Microscope

An optical instrument designed to eamine minute objects or parts of objects, and which so magnifies…

A class of carnivorous mammals native to the warmer parts of America, and commonly called tiger-cat.

Ocelot

A class of carnivorous mammals native to the warmer parts of America, and commonly called tiger-cat.

A genus of fishes beloning to the cephalopod group, and also known as cuttlefishes. They have a warty, oval body, eight arms of unequal length, and consist of fourty-six known species.

Octopus

A genus of fishes beloning to the cephalopod group, and also known as cuttlefishes. They have a warty,…

A genus of animals allied to the swine, and found extensively in South America and the southern parts of North America. There are two well known species, the white-lipped

Peccary

A genus of animals allied to the swine, and found extensively in South America and the southern parts…

A genus of plants of the nightshade family, which are native to the warmer parts of America. The leaves are entire, and somewhat resemble those of tobacco, especially in having a sticky surface and in emitting a disagreeable odor when crushed. The plants are perennial herbs, and the flowers are either single or double. They are cultivated extensively in gardens and in greenhouses, where they are grown chiefly as annual plants, since they bloom early.

Petunia

A genus of plants of the nightshade family, which are native to the warmer parts of America. The leaves…

A genus of plants distributed abundantly in all parts of the world. They inclue about one hundred species, and are most abundant in the temperate regions.

Plantain

A genus of plants distributed abundantly in all parts of the world. They inclue about one hundred species,…

A genus of plants distributed abundantly in all parts of the world. They inclue about one hundred species, and are most abundant in the temperate regions.

Plantain

A genus of plants distributed abundantly in all parts of the world. They inclue about one hundred species,…

A genus of deciduous trees, widely distributed in the north temperate zone, particularly in the temperate parts of North America and Eurasia.

Poplar

A genus of deciduous trees, widely distributed in the north temperate zone, particularly in the temperate…

A genus of plants, which are native chiefly to the warmer regions of Eurasia. They occur in many parts of Europe as weeds, but some species have been improved by propagation and are cultivated as ornamental plants and for the production of poppy oil and opium.

Poppy

A genus of plants, which are native chiefly to the warmer regions of Eurasia. They occur in many parts…

An architectural structure of solid masonry, built for various purposes in different parts of the world.

Pyramid

An architectural structure of solid masonry, built for various purposes in different parts of the world.

A species of mammals of the deer family, native to the northern regions of Eurasia. It has long been domesticated in Scandinavia, especially among the Laplanders, and in the northern parts of Asia, but is still found in the wild state in Spitzbergen and other sections of northern Eurasia.

Reindeer

A species of mammals of the deer family, native to the northern regions of Eurasia. It has long been…

A genus of wading birds allied to the sandpiper. They are found widely distributed in the northern parts of North America and Eurasia. They inhabit marshey places, and are migratory in their habits.

Ruff

A genus of wading birds allied to the sandpiper. They are found widely distributed in the northern parts…

A bent tube with limbs of unequal length, used for drawing liquids from one vessel into another.

Siphon

A bent tube with limbs of unequal length, used for drawing liquids from one vessel into another.

The framework of animals, which in vertebrates is composed of bone and cartilage. It serves to support the fleshy parts and the nervous system, and forms levers for the muscles.

Skeleton

The framework of animals, which in vertebrates is composed of bone and cartilage. It serves to support…

An extensive genus of birds found in all parts of the world. They are distinguished by a short, depressed bill with a wide gape, long, pointed wings, tail more or less forked, and weak feet.

Swallow

An extensive genus of birds found in all parts of the world. They are distinguished by a short, depressed…

A species of spider native to southern Europe, especially to the warmer parts of Italy.

Tarantula

A species of spider native to southern Europe, especially to the warmer parts of Italy.

A large genus of herbaceous plants, which are found in most parts of the glove, including about 200 varieties.

Violet

A large genus of herbaceous plants, which are found in most parts of the glove, including about 200…

An Aquatic bird found in many parts of North America and northern Europe.

Diver

An Aquatic bird found in many parts of North America and northern Europe.

This illustration shows the features in the life history of Pandorina: A, a colony of plants. B, each plant of the colony dividing to form a new colony. C, the plants of a colony escaping as gametes. D, the conjugation of two gametes of unequal size. E, later stage in the conjugation. F, gametospore or resting spore. G, Large zoospore formed from the gametospore. H, a colony formed by the division of the zoospore, G.

Pandorina

This illustration shows the features in the life history of Pandorina: A, a colony of plants. B, each…

A loop made in a rope by crossing the two parts and seizing them together.

Cuckold Knot

A loop made in a rope by crossing the two parts and seizing them together.

This is a diagram of the cross section of a fish, showing the bilateral symmetry of the parts: dv, dorsoventral axis; vl, right-left axis. a.p., anterior appendage; b.c., body cavity; ch, notochord; d.f., dorsal fin; g, gut; h, heart; h.a., haemal arch; m, muscles; n.., neural arch; sp, spinal cord; v.c., vertebral column.

Fish

This is a diagram of the cross section of a fish, showing the bilateral symmetry of the parts: dv, dorsoventral…

The genus Mammillaria is one of the largest in the cactus family Cactaceae. the distinctive feature of the genus is the specific development of an areole, that is split into two clearly separated parts, one occurring at the tubercules apex, the other at its base.

Mammillaria

The genus Mammillaria is one of the largest in the cactus family Cactaceae. the distinctive feature…

A horse, with names of parts. 1, crest; 2, withers; 3, croup; 4, hamstring; 5, hock; 6, cannon; 7, fetlock; 8, pastern; 9, hoof; 10, coronet; 11, arm; 12, gullet; 13, muzzle.

Horse

A horse, with names of parts. 1, crest; 2, withers; 3, croup; 4, hamstring; 5, hock; 6, cannon; 7, fetlock;…

Applied to various parts. To adjust it to the head make several turns around the head, then pass the bandage backward and forward over the scalp until the parts are covered. Secure the turns with pins or strips of adhesive plaster.

Recurrent Bandage

Applied to various parts. To adjust it to the head make several turns around the head, then pass the…

Applied to parts which do not vary in circumference. It is applied like the oblique except that the turns overlap each other.

Spiral Bandage

Applied to parts which do not vary in circumference. It is applied like the oblique except that the…

Bones situated at the sides and base of the skull. Each consists of five parts: the squama, the petrous, mastoid, and tympanic parts, and the styloid process.

Temporal Bone

Bones situated at the sides and base of the skull. Each consists of five parts: the squama, the petrous,…

Scheme showing the connection of the several parts to the brain.

Brain

Scheme showing the connection of the several parts to the brain.

Diagram showing air gaps between parts of Gray & Davis apparatus.

Air Gaps

Diagram showing air gaps between parts of Gray & Davis apparatus.

The circulation of protoplasm (p) in a cell of the stamen-hair of Tradescania. In the channels the granules move back and forth to the various parts of the cell. The remainder of the cell is filled with cell-sap (s) which in these cells is colored.

Protoplasm

The circulation of protoplasm (p) in a cell of the stamen-hair of Tradescania. In the channels the granules…

Diagram showing the principal parts of the cell and something of the protoplasmic architecture as it might appear while living. a, alveoli or spheres in the foam-work; c, centrosome; cy, cytoplasmic meshwork, containing granules; nu., nucleus; n, nucleolus; v. vacuole; w, cell wall.

Cell

Diagram showing the principal parts of the cell and something of the protoplasmic architecture as it…

"Scheme showing the essential relations of the parts of a nervous system: 1, the sensory end organ (epithelial); 2, afferent nerve tract; 3, central nervous cells (ganglia); 4, efferent nerves, leading to 5, muscle, gland, etc. g, ganglion cells; gl., gland; m, muscle fibre; n.f., nerve fibre; s.e., sensory epithelium." — Galloway

Nervous System

"Scheme showing the essential relations of the parts of a nervous system: 1, the sensory end organ (epithelial);…

"Pearly Nautilus. e, eye; h, hood, a muscular portion of the foot which protects the softer parts; s, siphon; se, septa, separating the successive chambers of the shell; sp, siphuncle; t, tentacles." — Galloway

Pearly Nautilus

"Pearly Nautilus. e, eye; h, hood, a muscular portion of the foot which protects the softer parts; s,…

A common bird found in nearly all parts of the world

Domestic Pigeon

A common bird found in nearly all parts of the world

The common ivy is a wellknown native of Britian and most parts of Europe and some parts of America. It has long, creeping, branched stems, climbing on trees and walls to a great height, by means of rootlets which cling to rough surfaces.

Ivy

The common ivy is a wellknown native of Britian and most parts of Europe and some parts of America.…

"If a pyramid be cut by a plane, parallel to the base, so as to form two parts, the lower part is called the frustum of the pyramid." — Hallock, 1905

Pyramid

"If a pyramid be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…

"If a cone be cut by a plane, parallel to the base, so as to form two parts, the lower part is called the frustum of the cone." — Hallock, 1905

Cone

"If a cone be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…