The very favorable reception which it met with in this country, in Great Britain, and on the Continent, from the medical press, the profession, and the public generally, led to the exhaustion of a large edition in a few months.

The present issue was announced nearly two years ago, and the printing begun. Increasing professional duties have, however, prevented me bestowing that continuous labor upon it which was desirable, and hence the publication has been long delayed. My apologies therefore are due, first, to my excellent and dear friend, the senior member of the house of J. B. Lippincott & Co., whose patience I know has been severely tried, but who has scarcely reproached me for my neglect; and second, to that portion of the public which has been kind enough to make repeated inquiries relative to the appearance of this monograph, and which I trust will not be disappointed, now that it is really published.

162 West 34th St., New York,
July 10th, 1869.


CONTENTS.

PAGE
[CHAPTER I.]
The Necessity for Sleep[9]
[CHAPTER II.]
The Causes of Sleep[18]
[CHAPTER III.]
The Physical Phenomena of Sleep[52]
[CHAPTER IV.]
The State of the Mind during Sleep[62]
[CHAPTER V.]
The Physiology of Dreams[107]
[CHAPTER VI.]
Morbid Dreams[147]
[CHAPTER VII.]
Somnambulism[192]
[CHAPTER VIII.]
The Pathology of Wakefulness[222]
[CHAPTER IX.]
The Exciting Causes of Wakefulness[240]
[CHAPTER X.]
The Treatment of Wakefulness[278]
[CHAPTER XI.]
Somnolence[288]
[CHAPTER XII.]
Somnolentia, or Sleep Drunkenness[304]
Appendix[317]

SLEEP AND ITS DERANGEMENTS.