MechanicsAndHandicraft1939-02.jpg Mechanics and Handicraft 1938-11ThumbnailsMechanics and Handicraft 1938-11ThumbnailsMechanics and Handicraft 1938-11Thumbnails

Liquid air for bombs, shown being loaded into small warplane; cutting your gas bills; practical welding; policing icebergs.



Artist:

Source: Grenville Abernethy, who sells on eBay as banjoflier, and has an eBay store as "model aviation magazines".