ier.

IV. THE PROBLEM OF THE GALLOPING HORSE 25

The Cinematograph--Ancient Representations of Gallop--The
Dog in Mycenaean Art--What ought an Artist
to do?--Attention as a Condition of Seeing--Judgment
and Prejudice--Natural and Artificial Paces--Photographs
by Electric Spark--Use of Instantaneous
Photographs--Errors as to the Size of the Moon--The
Painter and the Moon--The Moon on the Stage.

V. THE JEWEL IN THE TOAD'S HEAD 55

The Decay of Credulity--A Sceptical Physician--How
to Test a Toadstone--Other Magical Stones--Medicinal
and Magical Stones.

VI. ELEPHANTS 65

The Indian and the African Elephant--Size of Modern
Elephants--Ears and Teeth of Elephants--Earliest
Elephants brought to Europe--The Elephant's Legs--Tusks
used in Digging--Elephants used in War--Geological
Strata since the Chalk--Ancestral Mammals--The
Typical or Ancestral Set of Teeth--The
Peculiarities of the Teeth of Elephants--Extinct
Relatives of Elephants--Ancestors of Elephants--Origin
of the Elephant's Trunk.

VII. A STRANGE EXTINCT BEAST 92

Fossil Skeletons and Jaw-bones--The Skull and Teeth
of Goats--The Teeth of Rats--The Rat-toothed
Goat--Origin of the Rat-toothed Goat.

VIII. VEGETARIANS AND THEIR TEETH 102

Teeth of Carnivors--Mixed Diets--Disease-germs in
Food.

IX. FOOD AND COOKERY 113

Special Diet of Various Races--Food and Habit--Nervous
Control of Digestion--Wholesale Food and
Mechanical Cookery--The Burnt Offering of the
Jews--Women Neglect Cookery--A Great German's
Appreciation.

X. SMELLS AND PERFUMES 126

Smells and Memory--Accidental Qualities--Bacteria and
Smells--Some Remarkable Smells.

XI. KISSES 134

Kissing and Smelling--Variations in the Sense of
Smell--Radiation and Odours--Attraction by Smell--Unconscious
Guidance by Smell.

XII. LAUGHTER 144

Why do we Laugh?--Varieties of Laughter--The
Laugh of Escape from Death--The Laugh of
Derision.

XIII. FATHERLESS FROGS 152

Fertilization of the Egg-cell--Egg-cells