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.
In hanging old china plates for decorative purposes use three large white dress hooks, placed at equal distances apart on the edge of the plate. The hanging wire or cord is run through them from the back side and drawn up tightly. These hooks are much better than the ordinary plate hanger, as they are small and will not show much on the plate.