13 of 305    Contents xv PAGE formed; similarity of the associations in persons of the same country and class of society; different descriptions of associations, classified; their relative frequency; abstract ideas are slowly formed; multifariousness of sub- conscious operations. ANTECHAMBER OF CONSCIOUSNESS________________________ 146 Act of thinking analysed; automatic mental work; fluency of words and of imagery; processes of literary composition; fluency of spiritual ideas; visionary races of men; morbid ideas of inspiration (see Enthusiasm, 148). EARLY SENTIMENTS _______________________________________ 149 Accidents of education, religion, country, etc.; deaf-mutes and religious ritual; religion in its essentials; all religious teachers preach faith and instil prejudices; origin of the faculty of conscience; evolution is always behindhand; good men of various faiths; the fear of death; terror is easily taught; gregarious animals (see also 47); suspiciousness in the children of criminals; Dante and contemporary artists on the terrors of hell; aversion is easily taught, Eastern ideas of clean and unclean acts; the foregoing influences affect entire classes. HISTORY OF TWINS ________________________________________ 155 It supplies means of comparing the effects of nurture and nature; physiological signification of twinship; replies to a circular of inquiries; eighty cases of close resemblance between twins; the points in which their resemblance was closest; extracts from the replies; interchangeableness of likeness; cases of similar forms of insanity in both twins; their tastes and dispositions; causes of growing dissimilarity mainly referred to illness; partly to gradual development of latent elements of dissimilarity; effect of childish illnesses in permanently checking growth of head; parallel lives and deaths among twins; necessitarianism; twenty cases of great dissimilarity; extracts from the replies; evidence of slight exaggeration; education is almost powerless to diminish natural difference of character; simile of sticks floating down a brook; depth of impressions made in childhood; they are partly due to the ease with which parents and children understand one another; cuckoos forget the teachings of their foster-mothers. DOMESTICATION OF ANIMALS _____________________________ 173 Alternative hypotheses of the prehistoric process of domestication; savages rear captive animals; instances in North America; South America; North Africa; Equatorial Africa; South Africa; Australia; New Guinea Group;