That's a strange circuit, in addition to its rectifier connections and unwired pot sliders:
1) I notice that the current-booster transistor should be a PNP, since an NPN as shown has backwards polarity.
2) The base current of the current-booster transistor will ruin the voltage regulation of the LM317, when it flows through R2.
3) R3 has such a high resistance that the LM317 won't regulate anything.
4) Without a load, if you could somehow keep the current-booster transistor from saturating, then the 30V zener will force the LM317's output to follow the unregulated supply.
5) How do you get 10A (or even only 5A) through the 1A output fuse?
Yeah, National Semi's datasheet shows exactly how to do it properly.
As Ante said, an LM317 adjustable current regulator can be followed by an adjustable LM317 voltage regulator