What It Means to be Cool

As a technological innovation, air conditioning led to a ripple of positive externalities. Affecting how we live and work, it had private and social return.…

Temperature Matters

Shot on July 2, 1881, President Garfield lay dying in a room with the first air conditioner.  Naval engineers, whose primary expertise was ventilating mining shafts, had been called in to help the ail…

Popcorn Margins

Higher quality film? Better projectors? Online ticketing? No. The “most important technological innovation since sound” was the armrest cup holder (according to a movie theater owner). Ple…

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