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Humor porro Oleaginosus aquam humiditate & fluiditate per se, accensus vero Ignem flamma prodit, fumo Aerem, fuligine, nidore & amurca terram.

The method of preserving it is this: immediately after the oil has been pressed out, draw off the amurca and boil it down to one-third and, when it has cooled, store it in vats.

Some men even sprinkle their grain with amurca in the proportion of a quadrantal to every thousand modii of grain: others crumble or scatter over it, for the same purpose, other vermifuges like Chalcidian or Carian chalk or wormwood, and other things of that kind.

When it flows from the oil mill, amurca is a watery fluid full of dregs.

The walls and the floors should be plastered with a stucco of marble dust or at least with a mixture of clay and chaff and amurca, for amurca will serve to keep out mice and weevil and will make the grain solid and heavy.