Iris xiphium.
IRISH, ancient, selection practised by the.
IRON period, in Europe, dog of.
ISLANDS, oceanic, scarcity of useful plants on.
ISLAY, pigeons of.
ISOLATION, effect of, in favour of selection.
ITALY, vine-growing in, during the Bronze period.
IVY, sterility of, in the north of Europe.
JACK, Mr., effect of foreign pollen on grapes.
JACKAL. -hybrids of, with the dog. -prepotency of, over the dog.