Thinking of these wonderful white daws, when I have cast up my eyes to the birdless towers and domes of our great London buildings, it has occurred to me to ask the following question: Is there not one among the many very wealthy men in London, who annually throw away hundreds of thousands of pounds on their several crazes—is there not one to give, say, fifty or sixty pounds per annum to buy up all these beautiful albinos, at the usual price of one or two guineas per bird, for three or four years, and establish a colony at Westminster, or other suitable place, where thousands of people would have great delight in looking at them every day?
— from Birds in London by W. H. (William Henry) Hudson

When the middle box is chosen, the entrance door is lowered and the exit door immediately raised, thus uncovering the food, which the animal eats.
— from The Mental Life of Monkeys and Apes: A Study of Ideational Behavior by Robert Mearns Yerkes