February 11 - American Physiological Society organizes in Boston
February 13 - Rowland Hill at a UK government inquiry into postal reform discloses the idea of carrying letters in a separate sheet which folded to become an envelope and the idea of "a bit of paper" which could be affixed to a letter to flag that postage had been paid.
November 7 - In Alton, Illinois, abolitionist printer Elijah P. Lovejoy is shot to death by a mob (supporters of slavery) while he was attempting to protect his printing shop from being destroyed a third time.
Financial and economic panic in US (wildcat banking, paper speculation and inflated land values)
