Getting values from fitted variogram

I'm really sorry if this is a very simple question...

Using gstat and given the code:

data(meuse)
vgm1 <- variogram(log(zinc)~1, ~x+y, meuse)
fit.variogram(vgm1, vgm(1,"Sph",300,1))

I wonder if there is a simple way to get the value of "h"
corresponding to a given "gamma(h)"

Thanks a lot!

Paolo R.