Originally Posted by wphamilton

If you're weighing them both on the same scale, and the lead and feathers have exactly the same mass of one avoirdupois pound and the same shape and orientation, then the pound of lead would be heavier.

Because gravity acts as a point source from the center of both masses, lead is more dense and the scale contacts a surface of either mass so that the distance between the Earth's center and the center of the lead (d) is less than the distance to the center of the feathers. As weight is G*M1*M2/d^2

Sorry, pure irrelevant snark on my part but I am overcome in a fit of nerdiness and couldn't resist.