“Discovery can give no right of ownership, for whatever is discovered must have been already here to be discovered. If a man makes a wheelbarrow, or a book, or a picture, he has a moral right to that particular wheelbarrow, or book, or picture, but no right to ask that others be prevented from making similar things. Such a prohibition, though given for the purpose of stimulating discovery and invention, really in the long run operates as a check upon them.”
