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The Structure of the Brain; How to Understand and Cultivate Intellectual Power
The Structure of the Brain How to Understand and Cultivate Intellectual Power Author:Albert Wilson General Books publication date: 2009 Original publication date: 1899 Original Publisher: E. Stock Subjects: Fiction / Classics Fiction / Historical Fiction / Literary Literary Collections / General Literary Collections / American / General Literary Collections / Essays Literary Criticism / General Literary Criticism / Ame... more »rican / General Literary Criticism / European / English, Irish, Scottish, Welsh Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. Excerpt: CHAPTER II. The Brain: Its Coverings. The brain is the organ of the mind. It is a most complex machine, delicate in its structure and sensitive in its mechanism. Being of such great importance it requires most careful external protection. It is made up of two elements, Nerve-cells and Nerve-fibres. These are embedded in a soft substance called Neuroglia, which acts as padding. The whole brain is enclosed in a dense fibrous case filled up with fluid, so that in reality it floats; this condition diminishes jar or shock during the movements of the body. Outside the membranous sheath is the skull, and externally the scalp. The scalp is not ordinary skin, but a thick, tough, elastic hide, capable of resisting injury, and not sensitive to touch or temperature. The Skull is a strong, thick, bony-case, composed of eight bones, separate in infants, united in childhood, firmly welded together in the adult. The face is made up of fourteen bones. The skull varies in thickness in different parts, being as thin as a sixpence over the temple. In other parts it may vary from quarter to three quarters of an inch in different individuals. There are two layers or plates of bone in the skull. The outside casing is hard and dense, whilst the inner layer is softer and thinner. In...« less