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"<em>A</em>,frontal love of the cerebrum; <em>B</em>, parietal lobe; <em>C</em>, parieto-occipital lobe; <em>D</em>, occcipital lobe; <em>E</em>, cerebellum; <em>F</em>; arbor vitae; <em>H</em>, pons Varolii; <em>K</em>, medulla oblongata." — Blaisedell, 1904

Left Half of the Brain

"A,frontal love of the cerebrum; B, parietal lobe; C, parieto-occipital lobe;…

"The Upper Surface of the Cerebrum. Showing its division into two hemispheres, and also of the convolutions." &mdash; Blaisedell, 1904

Cerebrum

"The Upper Surface of the Cerebrum. Showing its division into two hemispheres, and also of the convolutions."…

"The cerebrum seen from above, showing the hemispheres." — Ritchie, 1918

Top View of the Cerebrum

"The cerebrum seen from above, showing the hemispheres." — Ritchie, 1918

"The contours of a half sphere are a series of circles, far apart near the center (top) and near together at the outside (bottom), showing that the slope of a hemisphere varies at all points, being nearly flat on top and increasing in steepness near bottom." &mdash; Moss, 1914

Contours of a half sphere

"The contours of a half sphere are a series of circles, far apart near the center (top) and near together…

"By means of the two hemispheres, it can be proved that the atmosphere presses upon a body equally in all directions. This device was invented by Otto Von Guericke, of Magdeburg, and is called the Magdeburg hemispheres." &mdash; Hallock, 1905

Magdeburg Hemispheres

"By means of the two hemispheres, it can be proved that the atmosphere presses upon a body equally in…

"When placed together after the air has been taken out, it will take two very strong men to pull apart." -Comstock 1850

Magdeburgh Hemispheres

"When placed together after the air has been taken out, it will take two very strong men to pull apart."…

"The size of the hemispheres of the brain (A) is so small that they leave exposed the olfactory ganglion (a), the cerebellum (C), and more or less of the optic lobes (B), and they are but partially connected together by the 'fornix' and 'anterior commissure,' the great cerebral commissure known as the 'corpus callosum' being absent." &mdash; Chambers, 1881

Opossum Brain

"The size of the hemispheres of the brain (A) is so small that they leave exposed the olfactory ganglion…