Prime Rib Roast

I used the recipe in my Culinary Arts Institute Encyclopedic Cookbook. The roast came out great. We had about 12 lb. so we cooked the roast at 300 degrees, uncovered for about 3 1/2 hours. The meat was moist and very juicy. Before i placed the roast in the over, I rubbed it down with sea salt, black pepper, garlic and olive oil.