Chapters 5 and 6

From the text:

Snowball declared that this was just the place for a windmill, which could be made to
operate a dynamo and supply the farm with electrical power. This would light the stalls and warm them in winter, and would also run a circular saw, a chaff-cutter, a mangel-slicer, and an electric milking machine."

"... he declared, so much labour would be saved that the animals would only need to work three days a week."