The thirty-four year old Charles XV was crowned ceremonially as King of Sweden and Norway on May 3, 1860. He had actually been serving as head of state for some time.  He had been appointed Regent on September 25, 1857 on the prolonged illness of his father and had taken the constitutional oath of office as monarch when his father died in July 1859.  He ruled until his death in September 1872.  (By John Osborne)

The United States Supreme Court adjourned its 1859-1860 session on this day.  It reconvened again on December 3, 1860 for its 1860-61 session without Associate Justice Peter V. Daniel, who had died at the end of May 1860.  His seat remained vacant until July 1862 when Samuel F. Miller of Iowa was appointed.  (By John Osborne)

Two law students from Cumberland University in Lebanon, Tennessee argued over a reportedly trivial matter.  One of them, James Sanders Cahal, struck the other, Spot McClung, whereupon McClung immediately drew a firearm and shot Cahal in the head.  Cahal lingered on for several weeks but died on May 26, 1860.  McClung was arrested, charged, and placed under a $15,000 bail assessment.  (By John Osborne)  

The National Medical Association met in Washington D.C.  The main item of business was the appointment of a committee of nine physicians to meet in Philadelphia to help with the 1860 reform of the United States Pharmacopeia.  The U.S. P. had been founded in 1820 and medical association representatives, along with Army and Navy Surgeons General, met to revise the list of sanctioned medicines at each following ten year interval.  (By John Osborne)