Jeremy Bentham: An Introduction to the Principles of Morals and Legislation
Chapter 1
The link address is: http://www.econlib.org/library/Bentham/bnthPML1.html#Chapter%20I,%20Of%20the%20Principle%20of%20Utility
The link address is: http://www.econlib.org/library/Bentham/bnthPML1.html#Chapter%20I,%20Of%20the%20Principle%20of%20Utility