The WSJ talks to a Cornell professor who has been studying the similarities between Twitter and the diaries of colonial Americans:
Before the end of the 19th century, diaries weren’t considered private or introspective. Instead, people wrote semi-public diaries that were often shared among faraway family members and others. And space was at a premium; by the mid-1800s, popular “pocket diaries” were only about 2 inches by 4 inches and were intended to be more mobile than earlier books.
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