Between 80 and 100 gallons of milk would be poured into the vat. Once the milk was heated to about 92 degrees F, a thickening agent, called rennet, was added. When the mixture reached the consistency of a thick gelatin, it was cut with a knife (sometimes called a cheese harp) into small chunks called curds.
This mixture was then transferred to the cheese press (small photo above), where the liquid, called whey, was pressed out.