Photographs from 1930s London show wire cages bolted to tenement window frames with toddlers sitting inside them, several stories above the pavement. The cages had mesh sides and a sloped roof to keep the rain off, with a solid floor underneath. A child could be left in one for an hour or two while a parent got on with the housework indoors. The pictures circulate now as proof that the past was deranged. They skip the part where doctors and London borough councils signed off on the idea.
The baby cage wasn't invented as a novelty. It grew out of a widespread medical belief that fresh air was essential to children's health, an idea that remained popular for decades. For families living in upper-floor apartments without gardens, a cage attached to the window offered a way to give babies outdoor air without leaving home.
The Doctrine Behind It
Luther Emmett Holt ran the Babies Hospital in New York and published a manual in 1894 called The Care and Feeding of Children. It included a section on airing, which treated regular exposure to outdoor air as a requirement rather than a pleasant extra. Fresh air, he wrote, was needed to renew and purify the blood. The manual went through repeated editions and shaped nursery practice on both sides of the Atlantic.
What Holt actually prescribed was modest. He told parents to dress the child as if for the street and set the crib a few feet from a window, with the sashes thrown wide and the doors shut. He also recommended cold baths, on the theory that a toughened child caught fewer colds, and he held that children who slept out of doors were sturdier than those who did not. A cage hanging over a street appears nowhere in his instructions.
The advice made more sense at the time than it does today. Tuberculosis was still killing large numbers of people, and before antibiotics, doctors had few treatments to offer beyond fresh air and sunlight. Sanatoriums had open-air verandas, and some cities even held school lessons outdoors through the winter. Apartments were often poorly ventilated and filled with coal smoke, so giving children time in the fresh air seemed like a sensible precaution.
Improvising In A Tenement
A flat four floors up has no yard, and that was the practical problem the cage solved. Parents who took the airing advice seriously and had nowhere to take a baby started looking for ways to get the child outside without going anywhere. Rooftops and fire escapes got used for the same purpose, with less engineering involved. Manufacturers noticed the demand before the patent office did.
Louis Fischer's handbook on infant health described the Boggins Window-Crib, an open-air sleeping compartment that attached to any window and suited city apartments. Eleanor Roosevelt went further in 1906, buying a chicken-wire cage and hanging it outside her East 36th Street window for her daughter Anna to nap in. By her own account in her autobiography, she knew nothing about babies. The window faced north into the cold and shade, and Anna cried in it. Neighbors threatened to report her to the Society for the Prevention of Cruelty to Children.
Emma Read of Spokane filed for a patent in July 1922 and received it the following March. Her portable baby cage was meant to clamp onto a sill and sit against the exterior wall, with wire mesh for air and room inside for toys and bedding. The drawings include a shingled roof angled against snow and curtains to draw while the baby slept.
How Far It Went
Britain took to the design more than America ever did. In January 1934 the East Poplar borough council in London proposed fitting cages to its tenement windows so that babies in council housing could get sun and air. By 1937 the Chelsea Baby Club was handing them out to members who lived in tall buildings without a yard to use.
Articles at the time spent real effort on reassurance, stressing that each cage was clamped securely to the frame and could not fall. The roof kept out weather and anything dropped from the windows above. Surviving photographs show mothers lowering infants in and children standing up to grip the mesh, with the street visible underneath.
It's harder to say exactly when baby cages disappeared than when they became popular. Antibiotics began changing tuberculosis treatment in the 1940s, gradually weakening the medical case for fresh-air cures. Attitudes toward child safety also changed, making cages suspended outside apartment windows less acceptable. Meanwhile, strollers became more affordable, giving parents an easier way to take their babies outdoors.
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