CHAPTER XVII.

UNITY OF THE HUMAN RACE.

Objections to the Unity of the Race--Anatomical-- Geographical--Disparity of--Non-existence of medium types-- Phenomena caused by two united types--Objections answered-- Both man and animals affected by climate, food, and condition--Examples--Argument from language--Ocean navigated by frail crafts--Examples--Captain Tyson and party--The two extremes exist in all nations, and even in families--People who have retrograded--Races will amalgamate and perpetuate their kind--Griquas--Papuas--Pitcairn Islanders--Law of hybridity--Close affinity of the races--Slow change of. 136