2 questions about early 1900 theater electrics

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Question 1. What might have been the purpose of the rail around this 1903 switchboard? It was located to the right of proscenium arch. Was rail to protect the board, the operator or others on the stage? From what? Please elaborate.

Question 2. This one requires speculation and I need the speculation of more knowledgeable folks. In new theater construction or renovation in early 1900s, what might have been the difference in...

2 questions about early 1900 theater electrics