ANIMAL INTELLIGENCE by George John Romanes (1848 - 1894)
Here is a pdf of the Introduction to the book Animal Intelligence by the 19th c evolutionary biologist, physiologist and associate of Charles Darwin, Mr George John Romanes. The Introduction outlines the principles used by the author to assess animal (non-human) intelligence in relation to how human intelligence was understood.. The text raises important questions that should be considered today in light of claims being made for artificial intelligence.