How is this setling of Humours produc'd?
Two several ways, viz. by Fluxion and Congestion.
What is the Setling by Fluxion?
It is that which raiseth the Tumour all at once, or in a very little space of time, by the Fluidity of the Matter.
What is the Setling by Congestion?
It is that which produceth the Tumour by little and little, and almost insensibly, by reason of the slow Progress and thickness of the Matter.
Which are the most dangerous Tumours, those that arise from Fluxion, or those that derive their Original from Congestion?
They that proceed from Congestion, because their thick and gross Matter always renders 'em obstinate, and difficult to be cur'd.
Whence do the differences of Tumours proceed?