Category: Plates and their Descriptions

Plate 1: The Watch

Fig. 1. The box, or barrel, containing the main spring, which is the first power; and the chain, which communicates the power to— Fig. 2. The fusee and great wheel. The fusee is tapered at the top to correct the irregular recoil of the spring. The great wheel turns— Fig. 3. The centre wheel and […]

Plate 2: The Eye

Fig. 1. The crystalline lens of a fish; it is proportionably larger than in other animals, and perfectly spherical. Fig. 2. A section of the human eye. It is formed of various coats, or membranes, containing pellucid humours of different degrees of density, and calculated for collecting the rays of light into a focus, upon […]

Plate 3: The Eye of Birds and of the Eel

Fig. 1, 2. The flexible rim, or hoop, of the eye of birds, consisting of bony plates, which occupy the front of the sclerotic; lying close together and overlapping each other. These bony plates in general form a slightly convex ring, Fig. 1, but in the accipitres they form a concave ring, as in Fig. […]

Plate 4: The Lachrymal Apparatus and Nictitating Membrane

Fig. 1. a, is the organ which supplies this fluid, called the lachrymal gland, it is situated at the outer and upper part of the orbit of the eye. This is the gland which secretes or separates the tears from the blood. There are five or six ducts or tubes, b, which convey this fluid […]

Plate 5: The Human Ear, and Tympanum of the Elephant

Fig. 1. The organ of hearing; a, the external ear; b, the meatus anditorius externus, or outward passage of the ear; leading to c, the membrana tympani, or drum; d, the ossicula auditus, or little bones of the ear; e, the semicircular canals; f, the cochlea; g, a section of the eustachian tube, which extends […]

Plate 7: Vertebrae of the Human Neck

Fig. 1. A representation of the head and the neck; the latter is composed of seven bones called vertebrae. Fig. 2. Exhibits the first and second vertebrae, with their mode of connexion. The uppermost vertebrae, termed the atlas, from its supporting the globe of the head, has an oval concave surface on either side, a, […]

Plate 8: Bones of the Arm

Fig. 1. a, the humerus; the head, b, is a portion of a sphere, and exhibits an example of the ball and socket, or universal joint; c, the hinge-joint, instanced in the elbow; d, the radius; e, the ulna. The radius belongs more peculiarly to the wrist, being the bone which supports the hand, and […]

Plate 9: The Spine

Fig. 1. The human spine, so named from the series of sharp processes projecting from the posterior part of the vertebrae. The spine consists of seven vertebrae of the neck, distinguished by the perforations in their transverse processes; of twelve belonging to the back, and marked by depressions for the heads of the ribs; and, […]

Plate 10: The Chest, Patella, and Shoulder-blade

Fig. 1. The spine, ribs, and sternum, constitute the frame work of the chest or thorax. Referring, however, to the plate, or to nature, we observe that the ribs are not continued throughout from the spine to the sternum, but intervening cartilages complete the form of the chest, by connecting the end of the first […]

Plate 11: The Hip, Knee and Ankle Joints

Fig. 1. The capsular ligament is here opened in order to show the ligament of the hip, named the round ligament. It allows considerable latitude of motion, at the same time that it is the great safeguard against dislocation. Fig. 2 and 4. The crucial or internal ligaments of the knee-joint arise from each side […]

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