of Antithesis--Instances in the dog and cat--Origin of the principle--
Conventional signs--The principle of antithesis has not arisen from opposite
actions being consciously performed under opposite impulses ..........50-65

CHAP. III--GENERAL PRINCIPLES OF EXPRESSION--_concluded_.

The principle of the direct action of the excited nervous system on the body,
independently of the will and in part of habit--Change of colour in the hair--
Trembling of the muscles--Modified secretions--Perspiration--Expression of
extreme pain--Of rage, great joy, and terror--Contrast between the emotions
which cause and do not cause expressive movements--Exciting and depressing
states of the mind--Summary............................................ 66-82

CHAP. IV--MEANS OF EXPRESSION. IN ANIMALS. The emission of sounds--
Vocal sounds--Sounds otherwise produced--Erection of the dermal appendages,
hairs, feathers, &c., under the emotions of anger and terror--The drawing back
of the ears as a preparation for fighting, and as an expression of anger--
Erection of the ears and raising the head, a sign of attention 88-114

CHAP. V.--SPECIAL EXPRESSIONS OF ANIMALS. The Dog, various expressive
movements of--Cats--Horses--Ruminants--Monkeys, their expression of joy
and affection--Of pain--Anger Astonishment and Terror Pages 115-145

CHAP. VI.--SPECIAL EXPRESSIONS OF MAN: SUFFERING AND WEEPING. The screaming
and weeping of infants--Form of features--Age at which weeping commences--
The effects of habitual restraint on weeping--Sobbing--Cause of
the contraction of the muscles round the eyes during screaming--
Cause of the secretion of tears 146-175

CHAP. VII.--LOW SPIRITS, ANXIETY, GRIEF, DEJECTION, DESPAIR. General effect