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Block faulting - region of horizontal strata intersected by vertical fissures.

Block Faulting

Block faulting - region of horizontal strata intersected by vertical fissures.

A top view of the human brain.

Brain

A top view of the human brain.

Fissures and gyres of the lateral surface of the left hemicerebrum of the brain.

Brain

Fissures and gyres of the lateral surface of the left hemicerebrum of the brain.

Fissures and gyres of the mesal surface of the left hemicerebrum of the brain.

Brain

Fissures and gyres of the mesal surface of the left hemicerebrum of the brain.

Fissures and gyres of the basal surface of the cerebrum portion of the brain.

Brain

Fissures and gyres of the basal surface of the cerebrum portion of the brain.

The brain seen from above. 1: Great fissure; 2: Anterior lobes; 3: Posterior lobes.

Brain

The brain seen from above. 1: Great fissure; 2: Anterior lobes; 3: Posterior lobes.

The brain seen from below. 1: Great fissure; 2: Anterior lobes of cerebrum; 3: Posterior lobes of cerebrum; 4: Lobes of cerebellum; 5: Cranial nerves; 6: Auditory nerve; 7: Optic nerve; 8: Olfactory nerve; 9: Main body of medulla oblongata; 10: End of medulla oblongata.

Brain

The brain seen from below. 1: Great fissure; 2: Anterior lobes of cerebrum; 3: Posterior lobes of cerebrum;…

The convolutionary projections of the precentral gyrus, and their relationship to motor areas.

Precentral Gyrus in the Brain

The convolutionary projections of the precentral gyrus, and their relationship to motor areas.

Showing the lines which indicate the position of the principal fissures of the brain.

Principle Fissures of the Brain

Showing the lines which indicate the position of the principal fissures of the brain.

Diagram of an ancient fissure in fine Upper Silurian limestone, etc., filled with rounded grains of sand, secondarily enlarged, and including fragments of the wall rock.

Fissure in Limestone

Diagram of an ancient fissure in fine Upper Silurian limestone, etc., filled with rounded grains of…

"A mountain and spring, showing how the principle of the syphon operates to produce the effect described. Suppose there is a crevice, or hollow in the rock from a to b, and a narrow fissure leading from it, in the form of the syphon, b c. The water from the rill fe, filling the hollow, up to the line a d, it will then discharge itself through the syphon, and continue to run until the water is exhausted down to the l g of the syphon b, when it will cease. Then the water from the rills continuing to run until the hollow is again filled up to the same line, the syphon again begins to act, and again discharges the contents of the reservoir as before, and thus the spring p, at one moment flows with great violence and the next moment ceases entirely." —Comstock, 1850

Intermitting Spring

"A mountain and spring, showing how the principle of the syphon operates to produce the effect described.…

"The spinal cord and nerve-roots. A, a small portion of the cord seen from the ventral side; B, the same seen laterally; C, a cross-section of the cord; D, the two roots of a spinal nerve; 1, ventral fissure; 2, dorsal fissure; 3, surface groove along the line of attachment of the ventral nerve-roots; 4, line of origin of the dorsal roots; 5, ventral root filaments of spinal nerve; 6, dorsal root filaments; 6', ganglion of the dorsal root; 7, 7', the first two divisions of the nerve-trunk after its formation by the union of the two roots. The grooves are much exaggerated." —Martin, 1917

Nerve Roots

"The spinal cord and nerve-roots. A, a small portion of the cord seen from the ventral side; B, the…

A window with a hinged sash that swings in or out like a door comprising either a side-hung, top-hung, or occasionally bottom-hung sash or a combination of these types, sometimes with fixed panels on one or more sides of the sash.

Casement Window

A window with a hinged sash that swings in or out like a door comprising either a side-hung, top-hung,…