Density
A number of techniques as well as standards exist for the measurement of density of materials. Such techniques include the use of a hydrometer (a buoyancy method for liquids), Hydrostatic balance (a buoyancy method for liquids and solids), immersed body method (a buoyancy method for liquids), pycnometer (liquids and solids), air comparison pycnometer (solids), oscillating densitometer (liquids), as well as pour and tap (solids). However, each individual method or technique measures different types of density (e.g. bulk density, skeletal density, etc.), and therefore it is necessary to have an understanding of the type of density being measured as well as the type of material in question.
Methanol (data page)
Here is a similar formula from the 67th edition of the CRC handbook. Note that the form of this formula as given is a fit to the Clausius–Clapeyron equation, which is a good theoretical starting point for calculating saturation vapor pressures:
Data obtained from "Lange's Handbook of Chemistry", 10th ed. and "CRC Handbook of Chemistry and Physics" 44th ed. The annotation, "d a"°C/"b"°C, indicates density of solution at temperature "a" divided by density of pure water at temperature "b" known as specific gravity. When temperature "b" is 4 °C, density of water is 0.999972 g/mL.Except where noted otherwise, data relate to standard ambient temperature and pressure.