YFAIR, JOHN, his _Illustrations of the Huttonian Theory_, 29;
explains the causes of Hutton's failure, 30

'Plutonism,' 'Vulcanism,' or 'Huttonism,' 18

Poets and Evolution, 16

PRESTWICH, Sir J., opposition to Lyell's views, 72

PREVOST, CONSTANT, aid to Lyell, 50;
opposition to Cuvier, 50

PRIESTLEY, persecution of, 21, 69

_Principles of Geology_, first idea of, 55;
early draft sent to publisher in 1827, 56;
withdrawn and rewritten in 1830, 56;
issue of first volume, 63;
success, 64;
review by Scrope, 60-62;
decision to confine Vol. II. to Organic Evolution, 65;
3rd volume, classification of Tertiaries and Metamorphic theory, 66;
later editions, 66;
_Elements, Manual and Student's elements_, 67;
success of work, 67;
Darwin's opinion on, 67;
of Huxley, 67, 80, 81;
Wallace on, 79;
criticisms of, 68, 69, 70, 71

PYTHAGORAS, his evolutionary ideas, 16

_Quarterly Review_, articles by Lyell, 56, 89;
by Scrope, 60, 62

Reviews, of the _Principles_ by Scrope, 56, 89;
by Whewell, 22, 53;
of the _Origin_ by Huxley, 136, 137

SCROPE, G. POULETT, education, 34;
travels, 34;
work in Auvergne, 35;
in Italy, 35;
delay in publishing, 35;
work on volcanoes, 36;
his just views on Evolution, 37-39;
cause of want of recognition of his work, 39, 40;
devotion to politics, 40;
reviews of _Principles_, 41, 61;
correspondence with and influence on Lyell, 50, 61;
his differences of opinion from Lyell, 62, 63, 151;
effects of his review, 64

SEDGWICK, A., advocates Catastrophism, 27, 28;
opposition to Hutton, influence on Scrope, 34;
on Darwin, 98;
opposition to Lyell, 83;
weakening of opposition to, 58;
on _Principles_, 70, 71;
dislike to Evolution, 83

SHIPLEY, A. E., estimate of number of species of animals, 10

Slavery, views of Lyell and Darwin, 76

SMITH, W., influence of his teaching on Geological Society, 27

SOLLAS, W. J., on Evolution and Uniformitarianism, 152, 153

Species, origin of idea of, 9;
number of species of animals, 10;
of plants, 11

Struggle for existence, Lyell on, 103, 107;
de Candolle on, 107

_Theory of the Earth_, Hutton's, 17;
Scrope's, 36

THOMPSON, G. P., _see_ Scrope, 33

Time geological, Lyell on, 154;
Lamarck on, 155

TOLLET, Miss G., aids Darwin in revising _Origin of Species_, 132

Uniformitarianism, origin of the term, 14, 15, 22

Uniformity (or Continuity), Lyell