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A rechargeable battery also known as a storage battery is a group of one or more secondary cells. Rechargeable batteries use electrochemical reactions that are electrically reversible. Rechargeable batteries can offer economic and environmental benefits compared to disposable batteries.

Storage Battery

A rechargeable battery also known as a storage battery is a group of one or more secondary cells. Rechargeable…

A fender louver on the rear wheel fender of a tractor to provide visual means of determining the condition of wheel rotation.

Automobile Fender

A fender louver on the rear wheel fender of a tractor to provide visual means of determining the condition…

A skirt guard or coat guard is a device fitted over the rear wheel of a bicycle to prevent a long skirt, coat or other trailing clothes or luggage catching in the wheel, or in the gap between the rim and the brakes.

Bicycle Riding Skirt

A skirt guard or coat guard is a device fitted over the rear wheel of a bicycle to prevent a long skirt,…

Fender is the US English term for the part of an automobile, motorcycle or other vehicle body that frames a wheel well. Its primary purpose is to prevent sand, mud, rocks, liquids, and other road spray from being thrown into the air by the rotating tire.

Car Fender

Fender is the US English term for the part of an automobile, motorcycle or other vehicle body that frames…

This knife features a unique knife guard which prevents the accidental sliding of the hand from the handle base onto the blade.

Knife Guard

This knife features a unique knife guard which prevents the accidental sliding of the hand from the…

A guard over each wheel of a motor vehicle, for example, that is shaped and positioned so as to block the splashing of water or mud.

Vehicle Fender

A guard over each wheel of a motor vehicle, for example, that is shaped and positioned so as to block…

A shield over or behind a vehicle's wheel to prevent mud or water from splashing onto that vehicle or a following vehicle. Also called splashguard.

Mud Guard

A shield over or behind a vehicle's wheel to prevent mud or water from splashing onto that vehicle or…

A guard over each wheel of a motor vehicle, for example, that is shaped and positioned so as to block the splashing of water or mud.

Vehicle Fender

A guard over each wheel of a motor vehicle, for example, that is shaped and positioned so as to block…

A razor with a guard or guards fitted close to the cutting edge or edges so that deep cuts are prevented and the risk of accidental cuts reduced

Safety Razor

A razor with a guard or guards fitted close to the cutting edge or edges so that deep cuts are prevented…

This is a pin featuring a protective guard end to prevent accidental puncture.

Pin Guard

This is a pin featuring a protective guard end to prevent accidental puncture.

A razor with a guard to prevent deep cuts in the skin

Safety Razor

A razor with a guard to prevent deep cuts in the skin

Used in combination with the vehicle fender to protect vehicle passengers, other vehicles, and pedestrians from mud and other flying debris thrown into the air by the rotating tire.

Mud Guard

Used in combination with the vehicle fender to protect vehicle passengers, other vehicles, and pedestrians…

The consul was the highest elected office of the Roman Republic. They were elected every year. The lictors were a member of a special class of Roman civil servant. Their tasks were to attend and guard the magistrates of the Roman Republic.

Consul and Lictors

The consul was the highest elected office of the Roman Republic. They were elected every year. The lictors…

A range of cliffs that form part of the British coastline facing the Strait of Dover and France. Historically, the cliffs have served as a symbolic guard against any attacks and threats coming in from Continental Europe and the English Channel.

The Cliffs of Dover

A range of cliffs that form part of the British coastline facing the Strait of Dover and France. Historically,…

"The Hesperidium is a fleshy fruit, in which the epicarp and mesocarp form a thick rind, and the endocarp projects inward, forming triangular divisions, in which pulpy cells are developed, which surround the seeds."—Darby, 1855

Hesperidium

"The Hesperidium is a fleshy fruit, in which the epicarp and mesocarp form a thick rind, and the endocarp…

"The Pome is an inferior fleshy fruit, of which the edicarp, mesocarp, and fleshy calyx form the greater part, which is eatable. The endocarp is tough and horny, and forms the cells of the seeds."—Darby, 1855

Pome

"The Pome is an inferior fleshy fruit, of which the edicarp, mesocarp, and fleshy calyx form the greater…

"The ship is sunk - he's wrecked at last at sea, / His life to guard in his extremity, / He binds around him his life-preserver, / Which buoys him safely above the water, / So if his float is lost, yet still he'll swim; / Some ship that's sailing by may take him in."—Barber, 1857

Hope for the Best, Prepare for the Worst

"The ship is sunk - he's wrecked at last at sea, / His life to guard in his extremity, / He binds around…

"It represents a dying lion, which, pierced by a lance, still guards with its paw the Bourbon lilies. The figure is hewn out of the natural sandstone. The monument commemorates the officers and men of the Swiss Guard who were slain in 1792, while defending the Tuileries against the Parisian mob."—Webster, 1920

The Lion of Lucerne

"It represents a dying lion, which, pierced by a lance, still guards with its paw the Bourbon lilies.…

This corn sheller design allowed corn to dropped to a hopper which was then carried using the rotational energy of the sheller wheel until the cob stroked the guard.

Corn Sheller

This corn sheller design allowed corn to dropped to a hopper which was then carried using the rotational…

Ichneumon flies have slender bodies, veined wings with the veins enclosing several spaces or cells, and long vibratile antennae of numerous joints. Ichneumon flies lay their eggs on the bodies of other insects.

Ichneumon Fly

Ichneumon flies have slender bodies, veined wings with the veins enclosing several spaces or cells,…

A pictures the process of anther running into spur of viola tricolor. NC pictures the nectar cells, somewhat exaggerated. B shows the anther and process as removed from the flower while (a) show anther cells.

Anther Cells and Process of Viola Tricolor

A pictures the process of anther running into spur of viola tricolor. NC pictures the nectar cells,…

Pictured is the cross section of the pelargonium blossom ovary. (gh) represents the glandular hairs, (h) shows the hair, (cu) shows the cuticle, and (nc) pictures the nectar cells.

Cross Section Through Pelargonium Blossom Ovary

Pictured is the cross section of the pelargonium blossom ovary. (gh) represents the glandular hairs,…

Pictured are nectar cells magnified 1000 diameters. The nectariferous nucleus is also pictured.

Nectar Cells

Pictured are nectar cells magnified 1000 diameters. The nectariferous nucleus is also pictured.

Pictured is an embryo sac of angiosperm before fertilization. The three stages are represented by A, B, and C. In A the helped and antipodal cells and the embryonal vesicle are still angular and the two nuclei are wide apart. In B the embryonal vesicle is rounded and the nuclei lie close together. In C the embryonal vesicle is ready to be fertilized.

Embryo Sac of Angiosperm Before Fertilization in Three Stages

Pictured is an embryo sac of angiosperm before fertilization. The three stages are represented by A,…

In the middle of the blister, on its lower surface, is a small opening, which permits the gall mites (phytoptus pyris) to pass out of the blister. The cells in the middle of the leaf are torn apart.

Blister Formed by Phytoptus Pyris by Leaf

In the middle of the blister, on its lower surface, is a small opening, which permits the gall mites…

Pinus is a genus of hardy, evergreen trees. Pictured are the strengthening cells (1), ducts surronded by strengthening cells (2), wavy chlorophylla bearing cells (3), bundle sheath (4), fibro-vascular bundle (5), stomata (6), and internal duct (7).

Transverse Section of Pinus Excelsa Leaf

Pinus is a genus of hardy, evergreen trees. Pictured are the strengthening cells (1), ducts surronded…

Shown are the strengthening cells (1), ducts (2), wavy, chlorophyll bearing cells (3), bundle sheath (4), fibro-vascular bundles (5), and stomata (6).

Transverse Section of Pinus Sylvestris Leaf

Shown are the strengthening cells (1), ducts (2), wavy, chlorophyll bearing cells (3), bundle sheath…

Pictured are (1) strengthening cells, (2), internal ducts, (3) chlorophyll bearing cells, (4) bundle sheath, (5) fibro-vascular bundles, and (6) stomata of the pinus coulteri leaf.

Transverse Section of Pinus Coulteri Leaf

Pictured are (1) strengthening cells, (2), internal ducts, (3) chlorophyll bearing cells, (4) bundle…

Striped, or striated, muscle which quickly contracts causing the alternating black and white lines. It has very delicate fibers (M FL). It is stimulated by nerve fibers (N F), which divide into an endplate (N E) on the contracting surface. N are nuclei, which are a part of elongated cells that fused together to make the muscle. M stands for muscle and N, except for nuclei, stands for nerve.

Striated Muscle

Striped, or striated, muscle which quickly contracts causing the alternating black and white lines.…

Three sections of smooth muscle. M C is muscle cells and N is nucleus. Smooth muscles are slow to contract. They make up the wall of a bladder and blood vessels.

Smooth Muscle

Three sections of smooth muscle. M C is muscle cells and N is nucleus. Smooth muscles are slow to contract.…

Diagram of the retina, aka percipient layer of the eye. 1: inner limiting membrane, which is next to the vitreous humor in the eye cavity; 2: a branch of a divided optic nerve; 3: ganglion cell layer; 4: inner nerve-fiber layer; 5: layer of bipolar ("inner granular") cells; 6: outer layer of nerve-cells; 7: layer of visual (outer granular) cells; 8: outer limiting membrane; 9: long and thing rods and short and broad cones; 10: pigment layer; 11: tangential cells; 12: bipolar cells; 13: amacrine cell; 14: centripetal optic nerve fibers; 15: centrifugal optic nerve fibers; 16: Muller's supporting cells. I, II, III: three areas of nerve cells in the retina.

Eye Retina

Diagram of the retina, aka percipient layer of the eye. 1: inner limiting membrane, which is next to…

Fucus is the generic name of various species of brown seaweed which form the main vegetation of rocky shores between tide marks. Most common of all is F. vesiculosus (Rockweed, Bladderweed, sea wave, etc.), easily distinguished by its entire edges and paired air vesicles. On account of the large proportion of ash it forms a valuable manure. Besides manure, the only direct chemical utilization of of the Fuci is for the preparation of Iodine. The vegetative body of Fucus is usually a thallus; the branching is dichotomous in one plane. Of the inner, or medullary, cells of the thallus, the outer wall becomes mucilaginous, while the less superficial of the rind cells develop filaments which grow inward, thus surrounding the inner cells within a network of filaments. The ladders are formed by the simple separation of portions of the tissue, the cavities becoming distended by air. Fertilization takes place when the ripe, fertile fronds are left bare by the tide. The fertilized ovum soon develops a wall, becomes attached, and proceeds to divide and lengthen, forming a root-like attachment at one end, a growing point at the other. This illustration shows a Fucus, 1) a cross-section of a fertile frond, 2) a female conceptacle, 3) a male conceptacle, and 4) Zoospores and Antheridia.

Fucus

Fucus is the generic name of various species of brown seaweed which form the main vegetation of rocky…

Nerve Ganglia, or Knots (sing. Ganglion; Knot) occur as collections of nerve cells on the course of a nerve, forming and obvious swelling. In surgery, it is the swelling caused by the collection of fluid in the fibrous sheath which surrounds a tendon. It arises from inflammation of the tendon-sheath, and occurs most often at the back of the wrist. Sometimes the cyst may be broken by firm pressure or by a smart blow, and the fluid be thus dispersed; or a puncture may be made, with proper antiseptic precautions, and the fluid be pressed out. Sometimes counter-irritation with iodine causes absorption. In any case, firm pressure with pad and bandage must be used afterwards, to prevent refilling until the cyst walls have united. This illustration shows a cross-section of a spinal cord and spinal nerve cells (g being ganglia).

Nerve Ganglia (Spinal)

Nerve Ganglia, or Knots (sing. Ganglion; Knot) occur as collections of nerve cells on the course of…

This illustration shows nerve cells from spinal ganglia.

Nerve Cells from Spinal Ganglia

This illustration shows nerve cells from spinal ganglia.

These Hargrave box kites are named so after their inventor, Lawrence Hargrave of Sydney. These kites generally have two rectangular cells covered with nainsook cloth, except at the top and bottom, and one is secured above the other by four or more sticks. Some of these kites stand 9 ft. high, have 70 sq. ft. of lifting surface, and weigh only eleven pounds.The kites can be flown singly or in tandem.

Hargrave Kite

These Hargrave box kites are named so after their inventor, Lawrence Hargrave of Sydney. These kites…

This illustration show a goal keeper guarding a goal in the game of lacrosse.

Goal Keeper Guarding Goal (Lacrosse)

This illustration show a goal keeper guarding a goal in the game of lacrosse.

Laminaria saccharina belongs to the group Laminariæ, a group of algæ belonging to the Phæosporeæ, a subdivision of the Phæosphyceæ, or brown seaweeds. The propagative cells are always swarm-spores of similar form and size; and these are produced in unilocular sporangia. The thallus has a stalk, often of considerable thickness, which is attached below to rocks or other substratum by means of rootlike growth, and ends above in a flat lamina, which may be divided or undivided.

Laminaria Saccharina

Laminaria saccharina belongs to the group Laminariæ, a group of algæ belonging to the Phæosporeæ,…

"And when a convenient day was come, that Herod on his birthday made a supper to his lords, and the high captains, and the chief men of Galilee; and when the daughter of Herodias herself came in and danced, she pleased Herod and them that sat at meat with him; and the king said unto the damsel, Ask of me whatsoever thou wilt, and I will give it thee. And he sware unto her, Whatsoever thou shalt ask of me, I will give it thee, unto the half of my kingdom. And she went out, and said unto her mother, What shall I ask? And she said, The head of John the Baptizer. And she came in straightway with haste unto the king, and asked, saying, I will that thou forthwith give me on a platter the head of John the Baptist. And the king was exceeding sorry; but for the sake of his oaths, and of them that sat at meat, he would not reject her. And straightway the king sent forth a soldier of his guard, and commanded to bring his head: and he went and beheaded him in the prison, and brought his head on a platter, and gave it to the damsel; and the damsel gave it to her mother." Mark 6:21-28 ASV <p>Illustration of John the Baptist about to be beheaded. The daughter of Herodias stands in the background with a platter.

Beheading of John the Baptist

"And when a convenient day was come, that Herod on his birthday made a supper to his lords, and the…

"And Pharaoh was wroth against his two officers, against the chief of the butlers, and against the chief of the bakers. And he put them in ward in the house of the captain of the guard, into the prison, the place where Joseph was bound." Genesis 40:2-3 ASV <p>Illustration of Joseph in the prison with two of Pharaoh's officers. Joseph leans against the wall between the two men, his left arm raised as he speaks. He wears only a tunic. One prisoner (right), sits on a bench and hides his face, leaning away from Joseph. The other man (left) sits on a bench and looks up at Joseph with hands clasped as if begging. Three small steps lead to a wooden door on the left.

Joseph in Prison with the Cup-Bearer and the Chief Baker

"And Pharaoh was wroth against his two officers, against the chief of the butlers, and against the chief…

"And he went out, and followed; and he knew not that it was true which was done by the angel, but thought he saw a vision. And when they were past the first and the second guard, they came unto the iron gate that leadeth into the city; which opened to them of its own accord: and they went out, and passed on through one street; and straightway the angel departed from him." Acts 12:9-10 ASV <p>Illustration of Peter being led out of the door to the prison by a glowing angel with wings. Inside the door, soldiers and guards are asleep on the floor inside an arched, domed prison. The city street opens into the distance.

Peter Emerges from Prison after Being Saved by an Angel

"And he went out, and followed; and he knew not that it was true which was done by the angel, but thought…

"And the jailor, being roused out of sleep and seeing the prison doors open, drew his sword and was about to kill himself, supposing that the prisoners had escaped. But Paul cried with a loud voice, saying, Do thyself no harm: for we are all here. And he called for lights and sprang in, and, trembling for fear, fell down before Paul and Silas, and brought them out and said, Sirs, what must I do to be saved?" Acts 16:27-30 ASV <p>Illustration of the jailer kneeling on one knee at Paul's feet in the jail. Paul stands above him with arms open and Silas is sitting on a bench leaning toward and reaching out for the jailer. A lamp is burning on the ground next to the jailer's sword. The door to the jail is in the corner.

Paul and Silas in Jail - the Jailer Kneels Before Paul

"And the jailor, being roused out of sleep and seeing the prison doors open, drew his sword and was…

<i>Sansevieria Zeylanica</i> is the Latin name, but this plant is also called a Mother-in-law's Tongue. "A genus of monocotyledonous plants of the order of <i>Haemodoraceae</i> and tribe <i>Ophiopogoneae</i>. It is characterized by a long and slender perianth-tube, six filiform filaments, and a free ovary, fixed by a broad base, containing three cells and three erect ovules." &mdash;Whitney, 1889

Snake Plant

Sansevieria Zeylanica is the Latin name, but this plant is also called a Mother-in-law's Tongue. "A…

<i>Sipunculus nudus</i>. A species of unsegmented marine worm, commonly called the peanut worm. "B, Larval Sipunculus, about one twelfth of an inch long. o, mouth; oe, esophagus; s, caecal gland; i1, intestine with masses of fatty cells; a, anus; w, ciliated groove of intestine; g, brain with two pairs of red eye-spots; n, nervous cord; p, pore; t, t1, so-called testes; W, W, circlet of cilia." &mdash;Whitney, 1889

Peanut Worm - Interior Anatomy of Larva

Sipunculus nudus. A species of unsegmented marine worm, commonly called the peanut worm. "B, Larval…

Spermatozooid, mature male germ cells, of <i>Adiantum capillus-veneris</i>. Also called spermatozoid.

Spermatozooid of the Southern Maidenhair Fern and Venus Hair Fern

Spermatozooid, mature male germ cells, of Adiantum capillus-veneris. Also called spermatozoid.

"A genus compound radiolarians, typical of the family <i>Sphaerozoidae</i>, the protoplasm of which contains colored cellaeform bodies, and gives rise to a network of spicules forming a loose detached skeleton." &mdash;Whitney, 1889

Sphaerozoum Ovodimare

"A genus compound radiolarians, typical of the family Sphaerozoidae, the protoplasm of which contains…

<i>Chalybion caeruleum</i>. "A family of fossorial hymenopters, or digger wasps. The prothorax is narrowed anteriorly, and forms a sort of neck; the basal segment of the abdomen is narrowed into a long, smooth, round petiole; and the head and thorax are usually clothed with a long, thin pubescence. These wasps usually burrow into sand-banks, and provision their cells with caterpillars and spiders." &mdash;Whitney, 1889

Spider Huntress Wasp

Chalybion caeruleum. "A family of fossorial hymenopters, or digger wasps. The prothorax is narrowed…

"A. natural size; B. two of the sacs with colored vesicles and spicules which lie in the investing protoplasm, magnified." &mdash;Whitney, 1889 <p>A colonial radiolarian possessing siliceous spicules.

Sphærozoum Punctatum

"A. natural size; B. two of the sacs with colored vesicles and spicules which lie in the investing protoplasm,…

Illustration of magnified <i>Spirochaeta obermeieri</i>. This genus of bacteria have "the cells united in long slender threads which usually show narrow spiral windings. The filaments have the liveliest movements, and clearly propel themselves forward and back, but are also able to bend in various ways...<i>S. obermeieri</i> is found in the blood of those sick with recurrent fever, is the cause of the disease." &mdash;Whitney, 1889

Spirochaeta Obermeieri, Bacteria

Illustration of magnified Spirochaeta obermeieri. This genus of bacteria have "the cells united in long…

"And the angel said unto him, Gird thyself, and bind on thy sandals. And he did so. And he saith unto him, Cast thy garment about thee, and follow me. And he went out, and followed; and he knew not that it was true which was done by the angel, but thought he saw a vision. And when they were past the first and the second guard, they came unto the iron gate that leadeth into the city; which opened to them of its own accord: and they went out, and passed on through one street; and straightway the angel departed from him." Acts 12:8-10 ASV <p>Illustration of Peter being led out of prison by the hand of an angel. Both Peter and the angel have one hand raised to heaven in praise and celebration. Sleeping guards sit on the ground.

Peter Released from Prison by an Angel

"And the angel said unto him, Gird thyself, and bind on thy sandals. And he did so. And he saith unto…