Project Gutenberg 2013-10-05 Public domain in the USA. 261 Hammond, William A. (William Alexander) 1828 1900 Hammond, William Alexander Hammond, W. A. (William Alexander) Sleep and Its Derangements Produced by The Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive.) "Sleep and Its Derangements" by William A. Hammond is a scientific publication written in the late 19th century. The book explores the complexities of sleep, discussing its necessity, causes, and the physiological phenomena associated with both sleep and various sleep disorders. It aims to shed light on the interplay between sleep and mental functions, particularly within the context of medical science during its time. The opening of the work establishes sleep as an essential biological process, emphasizing the importance of rest for the brain and nervous system for regeneration and health. Hammond provides a detailed examination of how wakefulness leads to the depletion of cerebral resources and why sleep is critical for restoring these resources. He introduces the concept of "unconscious cerebration," suggesting that even during sleep, mental activities can persist, albeit in a less effective manner. The text also foreshadows a more in-depth analysis of various sleep conditions and their implications for human health, setting the stage for the chapters that follow. (This is an automatically generated summary.) file:///public/vhost/g/gutenberg/html/files/43887/43887-h/images/cover.jpg Reading ease score: 55.0 (10th to 12th grade). Somewhat difficult to read. en Sleep disorders Sleep -- Physiological aspects QP Text Category: Health & Medicine Category: Psychiatry/Psychology 521186 2025-09-17T15:02:18.762122 text/html 502354 2024-10-23T18:54:40 text/html 248470 2025-09-17T15:02:24.520073 application/epub+zip 253567 2025-09-17T15:02:19.640069 application/epub+zip 245587 2025-09-17T15:02:19.177098 application/epub+zip 403420 2025-09-17T15:02:28.418045 application/x-mobipocket-ebook 348875 2025-09-17T15:02:24.029058 application/x-mobipocket-ebook 341333 2022-09-20T04:47:52.135854 application/x-mobipocket-ebook 467540 2025-09-17T15:02:18.079121 text/plain; charset=us-ascii 447629 2024-10-23T18:54:40 text/plain; charset=us-ascii 16558 2025-09-17T15:02:28.547028 application/rdf+xml 10181 2025-09-17T15:02:19.267076 image/jpeg 1462 2025-09-17T15:02:19.224067 image/jpeg 238797 2025-09-17T15:02:18.805087 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog en.wikipedia