Answer:
satire
Irony
Step-by-step explanation:
According to the excerpt from Remarks Concerning the Savages of North America, the device(s) used by Franklin are satire and irony.
This is because, he talks about the irony of regarding interruption in conversation as highly indecent, but the British House of Commons is always rowdy and loud and the Speaker has to repeatedly call for order.
The author also uses satire to compare the illogical sense of propriety in conversation but how people are expected to speak rapidly to avoid being interrupted.