Machine-oil must have a little lard or butter rubbed on the spot, which is then to be washed in warm suds.

Never rub soap directly on any stain, as it sets it.
For iron-rust, spread the garment in the sun, and cover the spot with salt; then squeeze on lemon-juice enough to wet it.

This is much safer and quite as sure as the acids sold for this purpose.

In bright sunshine the spot will disappear in a few hours.
Remember that long boiling does not improve clothes.

If washed clean, simply scalding is all that is required.
If delicate curtains, either lace or muslin, are to be washed, allow a tablespoonful of powdered borax to two gallons of warm water, and soap enough to make a strong suds.