Two pics that demonstrate a forgotten corner connected with schools. The first is of the large ventilator on the roof of Gisburn Road Board School in 1979. This was removed shortly afterwards but is a reminder that when the school was built the miasma theory of transmission of disease was prevalent and the defence with all public buildings was to ensure adequate ventilation. Can you remember the small cast iron handles that looked like a hand grasping a bar on the walls of buildings? These were to control the amount of pull the ventilator on the roof had on the air in the room.
The second pic is of Hope Memorial Primary School in Stockport where I started my education. When built it had a bell for summoning the pupils in the morning and at dinnertime.
These bells were also a feature of many of the early mills and were used for the same purpose but they soon found that a steam whistle was more effective. Here's the one on Butts mill (1843). Mitchell's Mill (Clough) had one as well.