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"Magnified view of transverse section of the spinal cord through the middle of the Lumbad Enlargement: showing, on the right side, the course of the Nerve-roots, and on the left, the position of the principal tracts of Vesicular Matter. A, anterior columns; P, posterior columns; L, lateral columns; a, anterior median fissure; p, posterior median fissure; b, anterior roots of spinal nerves; c, posterior roots; d, tracts of vesicular matter in anterior column; e, tracts of vesicular matter in posterior column; f, spinal canal." — Chambers, 1881

Spinal Cord

"Magnified view of transverse section of the spinal cord through the middle of the Lumbad Enlargement:…