Pietro, San, [92]

Pinerolo, [111]

Piora, [77]

Piotta, [26]

Piottino, Monte, [26]

Pirchiriano, Monte, [88]

Plants and animals, causes of their divergence, [153]

Plato a humbug, [156]

Plover, the, a liar, [69]

Pollaiuolo, Antonio, [131]