String the fresh string beans (No. 945); if too large, cut them lengthwise, and cook them in water with salt and butter; drain, and place them in a saucepan with one ounce of butter; add a teaspoonful of parsley and the same of chopped chives. Cook for five minutes, and when done, thicken the gravy with half a cupful of cream, two egg yolks, and the juice of a lemon. Mix well together for two minutes, and serve,