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Yesterday’s future, served up today… A Steam motorcycle, puppet opera, motorized velocipede and inside the biggest man made brain…

Med Steam Motorcycle
Steam motorcycle (1936) – Link.

Make 586
The puppet opera (1940) – Link.

Med Velocipede
Motorize your velocipede (1933) – Link.

Make 587
Vehicle oddities (1953) – Link.

Make 588
Inside the biggest man made brain (1947) – Link.

This and more @ Modern Mechanix – Link.