$R=1$, from which an extremely well collimated jet of very fast material exits along the poles.](fig2a.ps)

Figure 2 presents an example with a much smaller value of $Q=10^{-4}$, requiring a slightly thinner disk with $\theta_{0}=0.24$, close to 14 degrees. The figure shows a contour plot for dimensionless momentum flow, the product of the dimensionless velocity, $d {\cal R} /d {\cal T} $, and density in units of $M/ {\cal R}^{3}$ from eqs. (43) and (44). Within the disk contours span the from $-8$ to $-0.1$, in intervals of $0.05$, while in the jet contours span from $2\times 10^{-4}$ to $10^{-2}$ in intervals of $5 \times 10^{-5}$. The disk appears clearly identified as being made up of infalling material, while the jet shows up as a region of pure outflow carrying little mass, but at velocities of order $10^{5} c$. Again, we see the main features of the solution being well established in the region interior to $R<2$, the details of the radial part of the solution beyond this region will be somewhat off, within the qualitative solution shown.

The long range stability and coherence of these structures lies outside the scope of this work, and is in all probability furnished 