Modern Mechanix Round-Up

Today on Modern Mechanix we explore some DIY projects that may leave you gasping for air, a scheme to use balloons to float mail up to passing mail planes, the perfect secretary, strange devices used to water crops, and a radio that's disguised as a pair of books. Also check out this guy who made a crazy bet to drive his car across a ravine, riding on a nothing but a pair of cables and this 1933 article about the thrilling Los Angeles Air Races.