Stationary force-free magnetosphere of an axisymmetric pulsar is shown to have a separatrix inclination angle of 77.3 ^ { \circ } .
The electromagnetic field has an R ^ { -1 / 2 } singularity inside the separatrix near the light cylinder .
A numerical simulation of the magnetosphere which crudely reproduces these properties is presented .
The numerical results are used to estimate the power of an axisymmetric pulsar : L = ( 1 \pm 0.1 ) \mu ^ { 2 } \Omega ^ { 4 } / c ^ { 3 } .
A need for a better numerical simulation is pointed out .