Knocker-Uppers: The Human Alarm Clocks of the Industrial Age
When adapting to life as factory employees, members of the British and Irish public confronted a new, unexpected obstacle -- how do you make sure you wake up in time for your shift? While predecessors of the alarm clock existed, they were unreliable (and incredibly expensive). And so enterprising people across the land started their own wake-up service, becoming the human alarm clocks affectionately known as 'Knocker-Uppers.'
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