The Darwin Library

In which the singular and involuntary phenomenon of blushing is carefully examined, revealing its physiological underpinnings and its occurrence across various races and ages, notably more frequent and pronounced in the young and in women. The accompanying gestures and mental states of shame, modesty, and self-attention are observed with a thoughtful attention to detail, illustrating the blush as...

In which the varied and intense manifestations of fear and horror in man are meticulously observed, from the bristling of hair and dilation of pupils to the contraction of specific muscles and profound bodily prostration. Through careful examination and comparison with the expressions of animals, these signs are shown to arise from inherited reflexes, habitual associations, and the direct influenc...

In which the reflexive gestures and facial contortions accompanying surprise, astonishment, and fear are examined with attentive consideration, revealing a shared language of expression that spans the length and breadth of humanity and even extends to certain animals. The chapter delicately traces the subtle interplay of muscles and postures—from the arching eyebrows to the opened mouth and trembl...

In which the natural and inherited gestures of mankind—such as shrugging the shoulders to convey inability, resignation, or acquiescence—are carefully observed across diverse races and ages, revealing a remarkable uniformity in expression despite cultural differences. The contrasting motions of nodding and shaking the head as signs of affirmation and negation are likewise examined, showing both va...

In which the various expressions of disdain, contempt, and disgust are examined with careful attention to their universal gestures and subtle distinctions, revealing a constellation of habitual movements rooted in both sensation and association. The discourse further explores the manifestations of more complex emotions such as guilt, pride, and helplessness, illustrating the delicate interplay bet...

In which the varied gradations of hatred, ranging from subdued disdain to violent rage, are carefully examined through their bodily manifestations, such as flushes of colour, muscular tension, and the revealing of the teeth in a manner reminiscent of our animal ancestors. The study further explores the universal gestures of anger and defiance among diverse peoples, noting especially the curious ex...

In which the varied and subtle movements of the brow and mouth are carefully dissected to reveal their roles in expressing reflection, ill-temper, sulkiness, and determination, grounded in both instinctive habit and ancestral legacy. The study elucidates how these expressions, from frowning to pouting and firm mouth closure, serve as outward tokens of the mind’s encounters with difficulty, displea...

In which the gradual gradation from laughter to smile is observed with a delicate attention to the subtle muscular movements and sounds that accompany these joyous expressions, as well as the universal and varied manifestations of cheerfulness among different peoples. Also examined are the tender emotions of love and sympathy, the peculiar association of tears with such feelings, and the various c...

In which the nature of joy is explored through the vivid expressions of laughter and smiling, tracing their manifestations from childhood to adulthood, and examining the intricate muscular movements and physiological responses that accompany these states of happiness. Observations extend to various races and conditions, revealing laughter’s diverse causes, sounds, and appearances as a universal la...

In which the subtle actions of the muscles beneath the human forehead and around the eyes are patiently examined to reveal how grief and distress manifest in the obliquity of the eyebrows and the downturn of the mouth's corners. Through careful observation of children and adults alike, it is gently disclosed that these expressions are vestiges of our infantile cries, shaped by inherited habit and...

In which the nature of prolonged grief and low spirits is delicately examined through the subtle changes it imparts upon the human countenance, particularly the characteristic obliquity of the eyebrows and the downward droop of the mouth’s corners. The manifestations of such sorrowful emotions are further explored in various cultures and conditions, revealing a universal language of look and movem...

In which the intricate motions of the orbicular muscles around the eyes are observed to play a central role in the various expressions that accompany strong emotions and involuntary acts, notably in the secretion of tears during both distress and violent laughter. Through careful comparison with the habits of certain animals, and consideration of reflex actions and habitual associations, an accoun...

In which the natural expressions of suffering and weeping in man, particularly in infants, are carefully examined with attention to the muscular contractions and changes about the eyes and mouth that accompany crying, as well as the gradual development of tears and sobbing. The physiological necessity of the firm closure of the eyelids during violent expirations, such as screaming, is explored wit...

In which the varied and often subtle expressions of emotion in ruminants and monkeys are carefully observed, revealing gestures and sounds that beautifully mirror feelings such as pleasure, anger, and terror. These observations underscore the remarkable complexity of animal expression, challenging previous notions and illuminating a shared language of feeling that spans many species.

In which the various expressive movements of animals—most notably the dog, cat, and horse—are carefully observed and described, revealing how these creatures manifest joy, affection, fear, anger, and astonishment through instinctive gestures and postures. These natural expressions, often opposed through antithesis, reflect underlying emotions and habits, many of which appear to be inherited and cl...

In which various animals, from birds to reptiles and mammals, display the erection of hairs, feathers, or scales as an involuntary reflex often triggered by anger or fear, serving to increase their apparent size and intimidation. This natural phenomenon is accompanied by deliberate movements and vocalisations, signifying a complex interplay between instinct and habit shaped through generations for...

In which the expressive movements of animals are thoughtfully examined, focusing especially on vocal sounds—whether uttered by the voice or produced by other means—as well as the erection of hairs, feathers, and other appendages in states of anger or terror, all serving to communicate inner sensations and intentions. Through careful observation of diverse species, it is revealed how such natural s...

In which the intimate workings of the nervous system are observed to produce involuntary bodily expressions independently of the will or habit, manifesting in tremors, altered secretions, and muscular movements under intense emotion or sensation. These direct effects, intertwined with habitual responses and the principle of antithesis, offer a complex yet enlightening framework for understanding t...

In which the curious principle of antithesis is examined through the contrasting behaviours of dogs and cats, revealing how opposite states of mind bring about involuntary, yet expressive, movements in these animals. It is considered how such gestures—far from conscious invention—may have arisen naturally through habitual association of opposing muscular actions correlated with contrary emotions.

In which careful observation reveals that many reflex actions and habitual movements, originally acquired for definite purposes through voluntary effort, have become inherited and often persist without usefulness, manifesting as expressions of various sensations and desires. The habits of animals, from the circling of dogs before rest to the pawing of horses eager for food, exemplify how such acti...

In which the fundamental principles underlying the expression of emotions in both man and animals are carefully examined, illustrating how habitual actions, oppositional gestures, and nervous system impulses contribute to expressive movements. These reflections draw on keen observations from various species, highlighting the interplay of habit, inheritance, and reflex that shape the outward signs...

In which various emotions and behaviours across species are illustrated through careful depictions, from the defensive actions of animals to the expressive facial gestures of humans and primates. These visual representations, though sometimes indistinct from photographic reproduction, serve as faithful and invaluable records for understanding the nuanced expressions of feeling in both man and beas...

In which an earnest survey unfolds the various principles and manifestations of emotional expression across both man and animals, attentive to the subtle movements and postures that convey feeling. The discourse is enriched by thoughtful illustrations and observations that elucidate the physiognomy of sentiment and its diverse signs in living beings.

In which a comprehensive lexicon of natural history terms and concepts unfolds, encompassing the anatomy, classification, and distribution of plants and animals, from the minute infusoria to the great mammalian families. The exposition also touches upon geological formations, embryology, and various phenomena such as acclimatisation, variation, and instincts, offering a richly detailed reference t...

In which the manifold objections and difficulties attending the theory of natural selection are carefully reviewed and met with reasoned answers grounded in observation and analogy, illuminating how slight, successive modifications might have given rise to the wondrous diversity and complexity of life. This concluding discourse further contemplates the profound implications of descent with modific...