We certainly would agree that babies need a good dose of fresh air every day, but we're fairly certain this is not the best way to achieve it.
Apparently "Boggins' Window Cribs" were actually
sold available for sale in the 1920s.
"This outdoor crib is admirable adapted for city apartments. It is thirty-six inches long, twenty-four inches wide, and twenty-seven inches high. The illustration shows how comfortable the baby can be in this crib, and how he can be kept in view of his mother or nurse."
See links to more info at Boing Boing.