I was taught on an IBM electronic typewriter in 1991 to double space after periods.
Then, in 1994, after moving from Minnesota to Washington, I was taught on 386 PC's running WordPerfect 5.1 to double space after periods.
Every paper I ever wrote for college had double spaces between sentences. My advising prof was a red-pen nazi. Never a whiff of any frustration over double spaces.
Thorough confusion abounds from me. Looking at old documents that were hand-written, I see implied "double spaces" at the end of sentences.
Is the Constitution considered "primary" enough a text to set a standard?
Look here:
http://www.archives.gov/exhibits/charters/charters_downloads.htmlRepresentatives and direct Taxes shall be apportioned among the several States which may be included within this Union, according to their respective Numbers, which shall be determined by adding to the whole Number of free Persons, including those bound to Service for a Term of Years, and excluding Indians not taxed, three fifths of all other Persons.<<EXTREMELY LARGE APPARENT DOUBLESPACE HERE>>The actual Enumeration shall be made within three Years after the first Meeting of the Congress of the United States, and within every subsequent Term of ten Years, in such Manner as they shall by Law direct.
Interesting that reading the transcript of the document in electronic format yields only 1 space in that same position, though.
Those fellas back there were very fond of their run-on sentences and tended to make their paragraphs all one large sentence, but in places that they felt a need to add a period, they would increase the amount of space to the next word. It's quite apparent.