Misc: in the tv show 'scarecrow and mrs king' what is mrs king's first name?

Questions

What completed a journey of 19,500 miles with only three stops in August 1929?

What was the name of the first 'talking movie'?

In what year was the first talking movie 'The Jazz Singer' released?

What was the name of the medical journal established by Dr Thomas Wakely?

From which plant does the drug belladonna come from?