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.
When screws or nails are used to hang clothes or other articles on, run the nail or screw through a bottle cork as shown. The cork will prevent the nail or screw from tearing the article and also insure the cloth against rust marks, should the article be wet.
 
Continue to:
More: