Density of mercury near room temperature is 13.354 g/cm^3.
1lb is 453.59 grams.
453.59g/13.354g/ml=33.97ml
33.97 ml in fl oz is 1.14866 fluid ounces of mercury per pound near room temperature. Not that much really. Like, just slightly more than a 3/4-filled US single shotglass.
