On This Day: 11 May 1974 ---------- releases "Rikki Don't Lose that Number" ?

Questions

The depiction of the Mad Hatter in "Alice in Wonderland" reflected a poisoning of 19th century hatmakers from what?

Whose laws first described the motion of the planets round the sun?

What does the red spot on the Japanese flag represent?

How many years old was the telephone before one was installed on the desk of the President of the United States?

Which singer went solo after performing with the Commodores?