'Desert Utopia', Colliers Weekly
Tags: 1930s; 1931; 1931-10-17; Biology; Ecology; Pringle, Henry F.
'Gadget-Maker', The New Yorker
Tags: 1930; 1930-4-19; 1930s; Design and Invention; Elmer Sperry; Engineering; inventor; Pringle, Henry F.
'Prophet of Doom', The New Yorker
Tags: 1930; 1930-2-15; 1930s; Economics; Forecasting; Other; Pringle, Henry F.; Roger Babson; spirituality; Statistics
'Wheels in His Head', The New Yorker
Tags: 1920s; 1927; 1927-12-31; congestion; Engineering; Frank Hedley; Interborough Rapid Transit company; Mechanical Engineering; Pringle, Henry F.; Subway
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