Office(n.) The place where any kind of business or service for others is transacted; a building, suite of rooms, or room in which public officers or workers in any organization transact business; as, the register's office; a lawyer's office; the doctor's office; the Mayor's office.
The density of mercury (Hg) is 13.534 grams per milliliter. There are 29.5735297 milliliters in a fluid ounce. Therefore, there are 13.534 g/mL * 29.5735 mL/fl oz.
2) Inches of mercury (Hg) on a scale of 0 to 30, and the metric equivalent 3) Millimeters of Hg on a scale of 0 to 760 (A millimeter = 1/000 th of a meter) One needs to be cautious here, as the original mercury in a tube vacuum gauge measures the reduced pressure (vacuum) from atmospheric pressure downwards towards zero pressure, but the numbers on the scale read from 0 towards a maximum of 30.