This is from a book called The Principles and Practices of Modern Home Construction,published in the UK around 1900. The link points to the electrical wiring section,but you can peruse other chapters.

Electrical wiring: UK, 1900

The part that caught my attention was the plug/socket arrangement. Hubbell had invented the flat-blade for the US market in 1904,but the UK already had a round-pin type by 1900.

Should be an interesting read.