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.
Quite recently I tried out a method of reducing the consumption of gasoline in my automobile, and, as a result, have higher efficiency without resorting to any of the numerous and exceedingly costly devices on the market.
I procured a piece of wire screen, cut it in the shape of the gasket between the carburetor and the intake manifold, but leaving it blind, that is, with the screen across the inlet. I put this between two gaskets and fastened the whole back in place. The result was an increase of 3 miles per gallon of fuel. - Contributed by W. J. Weber, New York City.