Instead of a standard bouchon assembly being used this grenade is equipped with a Percussion Plug Assembly, Mark I, containing the striker, primer and standard two inch length Bickford fuse. The grenade is ignited by means of first, removing the percussion cover of cap, then knocking or striking the head of the striker sharply against a hard object or against the body.

Cross-Section of a Grenade

Instead of a standard bouchon assembly being used this grenade is equipped with a Percussion Plug Assembly,…

"Abundant on the shores of Mauritius and of the neighboring islands. For this and analogous species, there are fisheries in those regions, the animals being caught at night or near-rise, by nets attached to rakes." — Goodrich, 1859

Harp-shell

"Abundant on the shores of Mauritius and of the neighboring islands. For this and analogous species,…

An illustration of a harp-shell, "the shell of a genus of [mollusks] belonging to the gasteropoda and to the whelk family" (Vaughan).

Harp-shell

An illustration of a harp-shell, "the shell of a genus of [mollusks] belonging to the gasteropoda and…

"Many species hibernate. The land-snails bury themselves in the ground, or conceal themselves under the back of trees, in holes in walls, or even in the stems of large umbelliferous plants. They close the mouth of the shell with a calcareous plate, technically called an epiphragm, which they secrete by means of their mantle, and which is perforated by a small hole to admit the air." — Encyclopediia Britannica, 1893

Helix Descrtorun

"Many species hibernate. The land-snails bury themselves in the ground, or conceal themselves under…

"Hermit crab in the shell of a Gasteropod." — Galloway

Hermit Crab

"Hermit crab in the shell of a Gasteropod." — Galloway

Flat pieces of iron that are attached to each one of the horses hoofs.

Modern Horseshoe

Flat pieces of iron that are attached to each one of the horses hoofs.

A squash with a hard shell and better quality than other species of squash.

Essex Hybrid

A squash with a hard shell and better quality than other species of squash.

A clam with hydriods growing upon its shell.

Hydriods

A clam with hydriods growing upon its shell.

"Found only at New Zealand, and here it is rare; the shell is very beautiful, the whorls rising in a depressed cone." — Goodrich, 1859

Trochus imperialis

"Found only at New Zealand, and here it is rare; the shell is very beautiful, the whorls rising in a…

A Jason mollusk from the Reptilian age of the Mesozoic time.

Jason Mollusk

A Jason mollusk from the Reptilian age of the Mesozoic time.

"The <em>C. junonae</em> is a very beautiful species. The great assemblage of the different kinds is in the Indian Ocean, though some of the species are found in all seas." &mdash; Goodrich, 1859

Cardium junonae

"The C. junonae is a very beautiful species. The great assemblage of the different kinds is…

"The Lamp-Shell, <em>Terebratula maxillata, has a smooth convex shell, the animal attached by a peduncle." &mdash; Goodrich, 1859

Lamp-shell

"The Lamp-Shell, Terebratula maxillata, has a smooth convex shell, the animal attached by a peduncle."

A cup and saucer limpet.

Limpet

A cup and saucer limpet.

The Lingula have tongue-shaped shells with a long fleshy stalk, or pedicle, with which the animal burrows into sandy or muddy sediments.

Lingula

The Lingula have tongue-shaped shells with a long fleshy stalk, or pedicle, with which the animal burrows…

The Lingula antigua is a little bivalve shell belonging at the bottom of the class Brachiopoda. The inarticulate brachiopod genus Lingula is the oldest, relatively unchanged animal known. The oldest lingulid fossils are found in Lower Cambrian rocks dating to roughly 550 million years ago. The origin of brachiopods is unknown. A possible ancestor is a sort of ancient "armored slug" known as Halkieria that had small brachiopod-like shields on its head and tail.

Lingula Antigua

The Lingula antigua is a little bivalve shell belonging at the bottom of the class Brachiopoda. The…

The Lingula prima is a little bivalve shell belonging at the bottom of the class Brachiopoda. The inarticulate brachiopod genus Lingula is the oldest, relatively unchanged animal known. The oldest lingulid fossils are found in Lower Cambrian rocks dating to roughly 550 million years ago. The origin of brachiopods is unknown. A possible ancestor is a sort of ancient "armored slug" known as Halkieria that had small brachiopod-like shields on its head and tail.

Lingula Prima

The Lingula prima is a little bivalve shell belonging at the bottom of the class Brachiopoda. The inarticulate…

Lingula is a genus of brachiopods within the class Lingulata. Lingula is among the few brachiopods surviving today but also known from fossils over 500 million years old. Brachiopods are suspension feeding, marine, benthic lophophorates in two higher species, Inarticulata and Articulata.

Modern Lingula

Lingula is a genus of brachiopods within the class Lingulata. Lingula is among the few brachiopods surviving…

A fossilized shell.

Lituites

A fossilized shell.

This illustration shows the calcareous shell Lituola nautiloides. These shells are mostly very small, and yet through their abundance they have been very important in limestone-making.

Lituola Nautiloides

This illustration shows the calcareous shell Lituola nautiloides. These shells are mostly very small,…

Loreley, a water fairy, rides her chariot drawn by two goldfish. She was a siren, singing and distracting fishermen, until she fell in love with one of them.

Loreley in her Chariot

Loreley, a water fairy, rides her chariot drawn by two goldfish. She was a siren, singing and distracting…

"The shells of the <em>Hippopus maculatus</em> are smaller but are more beatiful, and are used in the manufacture of various ornamental articles, such as inkstands, &c." &mdash; Goodrich, 1859

Hippopus maculatus

"The shells of the Hippopus maculatus are smaller but are more beatiful, and are used in the…

"A convex mirror is generally a part of the other surface of a spherical shell. It increases the divergence, or decreases the convergence of light that falls upon it. The foci are virtual; the principal focus is midway between the center of the mirror and the center of curvature. The foci may be located and the images determined by processes closely similar to those used for concave mirrors, as illustrated." -Avery 1895

Convex Mirror

"A convex mirror is generally a part of the other surface of a spherical shell. It increases the divergence,…

This grenade is nothing more than the No. 5 fitted with a rod 5&frac14; inches long screwed into a steel base plug which in turn screws into the bottom of the grenade. To keep the lever of the bomb in place after the pin has been pulled, a ring attachment is fixed to the rifle by means of the bayonet.

Model 23, Mark I (Rifle)

This grenade is nothing more than the No. 5 fitted with a rod 5¼ inches long screwed into a steel…

"Anatomy of an Acephalous Mollusc (Mactra): s, stomach; ii, intestine; ag, anterior ganglions; pg, posterior ganglions; mn, muscles; a, anus; h, heart; l, liver; f, foot; sh, shell; ma, mantle; b, branchiae; t, tentacula; r, oral, or respiratory syphon; t, anal syphon." &mdash; Chambers, 1881

Mollusc Anatomy

"Anatomy of an Acephalous Mollusc (Mactra): s, stomach; ii, intestine; ag, anterior ganglions; pg, posterior…

"[From left to right:] Cockles, Imperial Volute, Clown Volute, Pholas, Helmet Shell" &mdash; Goodrich, 1859

Mollusca

"[From left to right:] Cockles, Imperial Volute, Clown Volute, Pholas, Helmet Shell" — Goodrich,…

"[From left to right:] Snail-shell and Egg, Ostrea and Spondylus, Carinaria, Vitreous Carinaria." &mdash; Goodrich, 1859

Mollusca

"[From left to right:] Snail-shell and Egg, Ostrea and Spondylus, Carinaria, Vitreous Carinaria." —…

Left valve of a mollusk of the Chamid&aelig' genus.

Mollusk

Left valve of a mollusk of the Chamidæ' genus.

Right valve of a mollusk of the Chamid&aelig' genus.

Mollusk

Right valve of a mollusk of the Chamidæ' genus.

An ancient mollusk from the Paleozoic time, Goniatites Marcellensis from the Hamilton group.

Goniatites Mollusk

An ancient mollusk from the Paleozoic time, Goniatites Marcellensis from the Hamilton group.

Bivalves are molluscs belonging to the class Bivalvia. They have two-part shells, and typically both valves are symmetrical along the hinge line. The class has 30,000 species, including scallops, clams, oysters and mussels. Other names for the class include Bivalva, Pelecypoda, and Lamellibranchia.

Right Valve of Mollusk

Bivalves are molluscs belonging to the class Bivalvia. They have two-part shells, and typically both…

An illustration of the right valve of a mollusk. Bivalves are molluscs belonging to the class Bivalvia. They have two-part shells, and typically both valves are symmetrical along the hinge line. The class has 30,000 species, including scallops, clams, oysters and mussels. Other names for the class include Bivalva, Pelecypoda, and Lamellibranchia.

Right Valve of Mollusks

An illustration of the right valve of a mollusk. Bivalves are molluscs belonging to the class Bivalvia.…

Mortar practice- putting in the shell.

Mortar practice

Mortar practice- putting in the shell.

"Mortar practice- 13-inch shell mortar, as used by the Federal government- weight of mortar 17,000 pounds." &mdash;Leslie, 1896

Mortar practice

"Mortar practice- 13-inch shell mortar, as used by the Federal government- weight of mortar 17,000 pounds."…

"Mortar practice- rear view of 13-inch mortar, with its usual complement of seven gunners. The mortar is one of the most ancient forms of cannon, being used as early as 1495 by Charles VIII at the siege of Naples. In 1478 the first attempt was made to project hollow shot filled with powder; but owing to their clumsy make the accidents were so frequent as to cause their discontinuance. In 1634 a French mechanic overcame the difficulty, and mortars were revived in the French service. Our illustrations represent a 13-inch mortar, the largest in general practice, weight 17,000 pounds, exclusive of the carriage. The number of men required to work one of these guns is seven, for all of whom there is distinct and adequate occupation. Mortars are not used in hand-to-hand encounters, their value consisting in pitching shells into camps and towns, or shelling fortifications erected on elevations, against which cannons are of no avail." &mdash;Leslie, 1896

Mortar practice

"Mortar practice- rear view of 13-inch mortar, with its usual complement of seven gunners. The mortar…

"[From left to right:] Shell from Malabar, Large Mussel, Thorned Murex, Large Helmet Shell." &mdash; Goodrich, 1859

Murcidae

"[From left to right:] Shell from Malabar, Large Mussel, Thorned Murex, Large Helmet Shell." —…

"Mussel attached by a byssus to a rock." &mdash; Goodrich, 1859

Mussel

"Mussel attached by a byssus to a rock." — Goodrich, 1859

"Longitudinal Section through a Fresh-water Mussel. a, edge of mantle; b, foot, with position of ganglion indicated; c, gills; d, mouth; e, tentacles or palps; f, posterior adductor muscle; g, anterior adductor; h, head-ganglion; i, ventricle of heart; j, auricle of heart; k, rectum; l, kidney; m, exhalent aperture; n, inhalent aperture." -Vaughan, 1906

Mussel Anatomy

"Longitudinal Section through a Fresh-water Mussel. a, edge of mantle; b, foot, with position of ganglion…

"Gyroceras goldfussi. GYROCERATIDAE. A family of nautiliform shells of a discoidal shape, in which the last whorl is parallel with the others, all being connected." -Whitney, 1911

Nautiloid

"Gyroceras goldfussi. GYROCERATIDAE. A family of nautiliform shells of a discoidal shape, in which the…

"Section of a nautilus showing its interior." &mdash; Goodrich, 1859

Nautilus

"Section of a nautilus showing its interior." — Goodrich, 1859

The modern Pearly Nautilus; the animal occupies the living chamber of the sectioned shell.

Chambered Nautilus

The modern Pearly Nautilus; the animal occupies the living chamber of the sectioned shell.

Roman god of the sea

Neptune

Roman god of the sea

"A compound foraminiferan, Nodosaria. a, aperture of shell; f, food particles captured by the strands of protoplasm outside the shell; n, nucleus; sh, shell, 1-4, the successive chambers of the shell; 1, being the oldest." &mdash; Galloway

Nodosaria

"A compound foraminiferan, Nodosaria. a, aperture of shell; f, food particles captured by the strands…

This illustration shows the calcareous shell Nodosaria vulgaris. These shells are mostly very small, and yet through their abundance they have been very important in limestone-making.

Nodosaria Vulgaris

This illustration shows the calcareous shell Nodosaria vulgaris. These shells are mostly very small,…

Shell of a Nummulite cut transversely and in part horizontally.

Shell of a Nummulite

Shell of a Nummulite cut transversely and in part horizontally.

This illustration shows the calcareous shell Nummulites nummularia. These shells are mostly very small, and yet through their abundance they have been very important in limestone-making.

Nummulites Nummularia

This illustration shows the calcareous shell Nummulites nummularia. These shells are mostly very small,…

Oysters grow for the most part in marine or brackish water. Inside a usually highly calcified shell is a soft body.

Oyster

Oysters grow for the most part in marine or brackish water. Inside a usually highly calcified shell…

Oysters grow for the most part in marine or brackish water. Inside a usually highly calcified shell is a soft body.

Oyster

Oysters grow for the most part in marine or brackish water. Inside a usually highly calcified shell…

Oysters grow for the most part in marine or brackish water. Inside a usually highly calcified shell is a soft body.

Oyster

Oysters grow for the most part in marine or brackish water. Inside a usually highly calcified shell…

An illustration of a oyster shell. The common name oyster is used for a number of different groups of bivalve mollusks, most of which live in marine habitats or brackish water. The shell consists of two usually highly calcified valves which surround a soft body. Gills filter plankton from the water, and strong adductor muscles are used to hold the shell closed.

Oyster Shell

An illustration of a oyster shell. The common name oyster is used for a number of different groups of…

An illustration of a oyster shell. The common name oyster is used for a number of different groups of bivalve mollusks, most of which live in marine habitats or brackish water. The shell consists of two usually highly calcified valves which surround a soft body. Gills filter plankton from the water, and strong adductor muscles are used to hold the shell closed.

Oyster Shell

An illustration of a oyster shell. The common name oyster is used for a number of different groups of…

An illustration of a oyster shell. The common name oyster is used for a number of different groups of bivalve mollusks, most of which live in marine habitats or brackish water. The shell consists of two usually highly calcified valves which surround a soft body. Gills filter plankton from the water, and strong adductor muscles are used to hold the shell closed.

Oyster Shell

An illustration of a oyster shell. The common name oyster is used for a number of different groups of…

"Pearly nautilus with half the shell removed." &mdash;Davison, 1906

Pearly Nautilus

"Pearly nautilus with half the shell removed." —Davison, 1906

The Pearly Nautilus (Nautilus Pompilius) is the only living representative of a unique form of cephalopod, recorded in fossils for over 500 million years. The shell, pearly and beautifully colored, is spirally formed and consists of a series of chambers separated by curved cross plates thus exemplifies the "chambered shell". The nautilus is a bottom feeder on Crustaceans, usually in deep water.

Pearly Nautilus

The Pearly Nautilus (Nautilus Pompilius) is the only living representative of a unique form of cephalopod,…

Shells of a pelecypod found in the elevated sand beds of northeastern New England, New Brunswick, etc. This species still lives in the modern ocean.

Pelecypod

Shells of a pelecypod found in the elevated sand beds of northeastern New England, New Brunswick, etc.…

A small mollusk. Burrows in soft rocks and is frequently killed by the cold when exposed during times of low tide.

Piddock

A small mollusk. Burrows in soft rocks and is frequently killed by the cold when exposed during times…

A mollusk radiate from the Paleozoic time, Platyceras angulatum from the Niagara group.

Platyceras Mollusk

A mollusk radiate from the Paleozoic time, Platyceras angulatum from the Niagara group.

Poseidon (god of the sea) and Amphitrite (queen of the sea) ride in a shell-shaped chariot pulled by sea creatures and surrounded by Tritons.

Poseidon and Amphitrite

Poseidon (god of the sea) and Amphitrite (queen of the sea) ride in a shell-shaped chariot pulled by…

A mollusk radiate from the Paleozoic time, Pterinea emacerata from the Niagara group.

Pterinea Mollusk

A mollusk radiate from the Paleozoic time, Pterinea emacerata from the Niagara group.

A mollusk radiate from the Paleozoic time, Rhynchotreta cuneata from the United States and Great Britain.

Rhynchotreta Mollusk

A mollusk radiate from the Paleozoic time, Rhynchotreta cuneata from the United States and Great Britain.

"River-Mussel (Anodonta fragilis), North Carolina."-Whitney, 1902

River Mussel

"River-Mussel (Anodonta fragilis), North Carolina."-Whitney, 1902