To Keep Juice From Running Out Of Pies:
Your rhubarb pies will stay juicy and the juice will remain in the pies instead of the oven if to every pie you will sprinkle in two rounded tablespoons of fine bread crumbs. Sprinkle one on the bottom and the other mixed with the rhubarb. Use the bread crumbs in adddition to the usual flour that one puts into juicy pies.
For a spiced pie, omit orange peel and add l/4 teasp numeg.
For a pineapple-rhubarb, substitute 1 cup drained crushed pineapple (canned) for 1 cup rhubarb.
My pie book has a variety of rhubarb pies but this is the one I make the most.