Small plates are sewn onto cloth, overlapping. "Scale-armor of the Early Middle Ages." -Whitney, 1911

Scale Armor

Small plates are sewn onto cloth, overlapping. "Scale-armor of the Early Middle Ages." -Whitney, 1911

Muscles on the dorsum of the scapula and triceps.

Muscles of the Scapula and Triceps

Muscles on the dorsum of the scapula and triceps.

"The power is generally applied by a wheel or a lever, and moves through the circumfrence of a circle. The distance between the two consecutive turns of any on continuous thread, measured in the direction of the axis of the screw, is called the pitch of the screw." -Avery 1895

Screw with Lever Arm

"The power is generally applied by a wheel or a lever, and moves through the circumfrence of a circle.…

A smoothbore gun that fires shot over short ranges. Also called scattergun.

Military Shotgun

A smoothbore gun that fires shot over short ranges. Also called scattergun.

Bones of the shoulder and arm

Shoulder

Bones of the shoulder and arm

Bones of the shoulder and arm

Shoulder

Bones of the shoulder and arm

Lymphatics and lymphatic glands on the left side of the body and shoulder.

Lymphatics of the Shoulder

Lymphatics and lymphatic glands on the left side of the body and shoulder.

"A sling for the arm made from a triangular bandage." —Davison, 1910

Boy with sling

"A sling for the arm made from a triangular bandage." —Davison, 1910

"Extend the arm horizontally toward the platoon leader; swing the hand up and down from the wrist." — Moss, 1914

Squad

"Extend the arm horizontally toward the platoon leader; swing the hand up and down from the wrist."…

"Extend the arm vertically above the head; carry it laterally downward to the side and swing it several times between the vertical and downward positions." — Moss, 1914

Squad right about, march

"Extend the arm vertically above the head; carry it laterally downward to the side and swing it several…

"Raise the arm laterally until horizontal; carry it downward to the side and swing it several times between the downward and horizontal positions." — Anthon, 1891

Squads left, march

"Raise the arm laterally until horizontal; carry it downward to the side and swing it several times…

The tendons reach only to the wrist. Fine cords pass to the fingers.

Tendons of the Arm

The tendons reach only to the wrist. Fine cords pass to the fingers.

This illustration shows a method of applying a triangular bandage to the chest, shoulder, head and elbow.

Triangular Bandage

This illustration shows a method of applying a triangular bandage to the chest, shoulder, head and elbow.

The ulna bone in the human arm.

Ulna

The ulna bone in the human arm.

"The <em>ulna</em>, or elbow bone, is the larger of these two bones. It is joined to the humerus by a hinge joint at the elbow. It is on the same side as the little finger. The <em>radius</em>, queerly named because it is supposed to resemble one of the spokes of a wheel, is the long, slightly curved, outer bone fo the forearm. It is on the same side as the thumb. Its upper end is fastened both to the ulna and the humerus." — Blaisedell, 1904

Ulna and Radius

"The ulna, or elbow bone, is the larger of these two bones. It is joined to the humerus by…

The Ulna and Radius. Labels: 1, radius; 2, ulna; o, olecranon process, on the anterior surface of which are seen the large (gs) and the small (ls) cavities for the reception of the lower end of the humerus and of the head of the radius, respectively; h, head of radius.

The Human Ulna and Radius

The Ulna and Radius. Labels: 1, radius; 2, ulna; o, olecranon process, on the anterior surface of which…

Fracture of upper third of ulna, with dislocation of radius forward.

Fractured Ulna with Dislocation of Radius

Fracture of upper third of ulna, with dislocation of radius forward.

"Fore limbs of vertebrates showing similarity of structure. <em>A</em>, salamander; <em>B</em>, turtle; <em>C</em>, very young bird; <em>D</em>, adult bird; <em>E</em>, dog; <em>F</em>, man." &mdash; Davison, 1906

Forearms of vertebrates

"Fore limbs of vertebrates showing similarity of structure. A, salamander; B, turtle;…

"Vibration of a wire. A conducting copper wire, w, is suspended by a loop from a hook of the same metal, which passes through the arm of metal or wood, as seen in the cut. The upper end of the hook terminates in the cup P, to contain mercury. The lower end of the copper wire just touched the mercury, Q, contained in a little trough about an inch long, formed in the wood on which the horseshoe magnet, M, is laid, the mercury being equally distant from the two poles. The cup, N, has a stem of wire which passes through the wood of the platform into the mercury, this end of the wire being tinned, or amalgamated, so as to form a perfect contact." &mdash;Comstock, 1850

Wire Vibration

"Vibration of a wire. A conducting copper wire, w, is suspended by a loop from a hook of the same metal,…

A cartoon of a young boy, with his arm wrapped in a sling.

Young Boy with Sling

A cartoon of a young boy, with his arm wrapped in a sling.