Irtysh brought them into Nagasaki after dark. The days were shorter now, and the official workday didn't end until after the sun had set. The availability of artificial light in addition to light generated by the working fires meant the workday in some industries could keep regulated hours year around. This was something new. Sunup to sundown was the usual worker's shift, based on a tidy correlation between availability of light and the needs of agriculture. If it was longer in the summer, ...