This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
Two coil springs of medium strength placed in the chains of a porch swing will make it ride easier and also take up any unpleasant jars and rattles occasioned when a person sits heavily in the. swing. If the swing is provided with a four-chain suspension, the springs should be used on the two rear chains to get the best results. - Contributed by E. K. Marshall, Oak Park, Illinois.