/usr/include/boost/units/physical_dimensions/ is in libboost1.46-dev 1.46.1-7ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/units/physical_dimensions/absorbed_dose.hpp
/usr/include/boost/units/physical_dimensions/acceleration.hpp
/usr/include/boost/units/physical_dimensions/action.hpp
/usr/include/boost/units/physical_dimensions/activity.hpp
/usr/include/boost/units/physical_dimensions/amount.hpp
/usr/include/boost/units/physical_dimensions/angular_acceleration.hpp
/usr/include/boost/units/physical_dimensions/angular_momentum.hpp
/usr/include/boost/units/physical_dimensions/angular_velocity.hpp
/usr/include/boost/units/physical_dimensions/area.hpp
/usr/include/boost/units/physical_dimensions/capacitance.hpp
/usr/include/boost/units/physical_dimensions/conductance.hpp
/usr/include/boost/units/physical_dimensions/conductivity.hpp
/usr/include/boost/units/physical_dimensions/current.hpp
/usr/include/boost/units/physical_dimensions/dose_equivalent.hpp
/usr/include/boost/units/physical_dimensions/dynamic_viscosity.hpp
/usr/include/boost/units/physical_dimensions/electric_charge.hpp
/usr/include/boost/units/physical_dimensions/electric_potential.hpp
/usr/include/boost/units/physical_dimensions/energy.hpp
/usr/include/boost/units/physical_dimensions/energy_density.hpp
/usr/include/boost/units/physical_dimensions/force.hpp
/usr/include/boost/units/physical_dimensions/frequency.hpp
/usr/include/boost/units/physical_dimensions/heat_capacity.hpp
/usr/include/boost/units/physical_dimensions/illuminance.hpp
/usr/include/boost/units/physical_dimensions/impedance.hpp
/usr/include/boost/units/physical_dimensions/inductance.hpp
/usr/include/boost/units/physical_dimensions/kinematic_viscosity.hpp
/usr/include/boost/units/physical_dimensions/length.hpp
/usr/include/boost/units/physical_dimensions/luminance.hpp
/usr/include/boost/units/physical_dimensions/luminous_flux.hpp
/usr/include/boost/units/physical_dimensions/luminous_intensity.hpp
/usr/include/boost/units/physical_dimensions/magnetic_field_intensity.hpp
/usr/include/boost/units/physical_dimensions/magnetic_flux.hpp
/usr/include/boost/units/physical_dimensions/magnetic_flux_density.hpp
/usr/include/boost/units/physical_dimensions/mass.hpp
/usr/include/boost/units/physical_dimensions/mass_density.hpp
/usr/include/boost/units/physical_dimensions/molar_energy.hpp
/usr/include/boost/units/physical_dimensions/molar_heat_capacity.hpp
/usr/include/boost/units/physical_dimensions/moment_of_inertia.hpp
/usr/include/boost/units/physical_dimensions/momentum.hpp
/usr/include/boost/units/physical_dimensions/permeability.hpp
/usr/include/boost/units/physical_dimensions/permittivity.hpp
/usr/include/boost/units/physical_dimensions/plane_angle.hpp
/usr/include/boost/units/physical_dimensions/power.hpp
/usr/include/boost/units/physical_dimensions/pressure.hpp
/usr/include/boost/units/physical_dimensions/reluctance.hpp
/usr/include/boost/units/physical_dimensions/resistance.hpp
/usr/include/boost/units/physical_dimensions/resistivity.hpp
/usr/include/boost/units/physical_dimensions/solid_angle.hpp
/usr/include/boost/units/physical_dimensions/specific_energy.hpp
/usr/include/boost/units/physical_dimensions/specific_heat_capacity.hpp
/usr/include/boost/units/physical_dimensions/specific_volume.hpp
/usr/include/boost/units/physical_dimensions/stress.hpp
/usr/include/boost/units/physical_dimensions/surface_density.hpp
/usr/include/boost/units/physical_dimensions/surface_tension.hpp
/usr/include/boost/units/physical_dimensions/temperature.hpp
/usr/include/boost/units/physical_dimensions/thermal_conductivity.hpp
/usr/include/boost/units/physical_dimensions/time.hpp
/usr/include/boost/units/physical_dimensions/torque.hpp
/usr/include/boost/units/physical_dimensions/velocity.hpp
/usr/include/boost/units/physical_dimensions/volume.hpp
/usr/include/boost/units/physical_dimensions/wavenumber.hpp