Two-roll steam mangle. The heat is in the chest, not the roll — the roll is padding and pressure. You are on the feed side. Marcelina is at the delivery end, taking off, and she will tell you what you did.
Grab the near corner of a piece in the basket at your left.
Snap it — a fast outward flick. A slow drag shakes nothing out.
Feed the leading edge square to the roll. It goes in at its own speed; keep up or it tears out of your hand.
Let go before your fingers reach the guard bar. The bar's there for one reason.
Treadle: drag the bar along the bottom edge. Slow cloth under a hot chest is how you yellow linen.
Sound on if you want to hear the roll. Keyboard: ← → treadle, space release.