From Popular Science. To quote:
Sleeping Porch: May 1916
A baby porch suspended a hundred feet above ground? What could possibly go wrong? As city populations grew, people grew concerned about raising young children in tight spaces. Inventors suggested the miniature sleeping porch, which could be installed outside any window. The device seemed sturdy enough -- an iron brace enabled it to carry 500 pounds of weight, while anchors protected the porch from strong winds. The compartment's barred windows and netting kept the baby from climbing out (and bugs from flying in), and as the image shows, it was roomy enough to hold a tiny carriage "so that the effort of the mother in taking the baby in and out is reduced to a minimum."
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What were they thinking?!