[Bell Historians] Netting on Towers

[David Bryant]

> Why can't the netting be fix to the inside of the tower windows? This 
> would surely be much easier to fit.

If the louvres are deep and / or shallowly-pitched the birds might still
roost on them, and the guano tends to rust any netting on the inside
rapidly. By netting the outside this cannot happen.

David