if you look at history of carbs , there was vapour carb like air passing over cotton soaked with fuel , only vapour enters engine .
early heat exchanger vapour carbs used up draft while the heat plate was down next to the exhaust manifold .= cold air plus hot fuel mixes + goes up to the intake .
there was up draft carb where carb was below engine intake so fuel has to be lifted by the air .
there was side draft where carb is inline with engine intake
then there was down draft carbs up to 1980s / 90s where fuel drops down into engine , fuel is poured into engine
then everything went fuel injection
all the while there has been alternative carbs made in sheds
Pathe has a site , maybe archive too . News reel has a site and archive . the film is out there . movietone , universal , etc
it is either 1934 or 1935