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.
The ordinary pasteboard boxes for holding phonograph records are very hard to close, due to the air pressure on the inside. I overcome this difficulty by making three small holes in the cover with a pin.-Contributed by Robert Bandul, New Orleans, La.
 
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