Misc: In 1938 British PM Chamberlain visits Hitler at---------- . ?

Questions

The bones of a _____ weigh less than it's feathers?

The book called 'the cocktail party' was written by _________?

The branch of medicine dealing with curing by operative procedures is ________?

The Braves moved to Atlanta from where?

The bridge connecting Boston & Cambridge via Massachusetts Avenue is commonly know as the ______?