Richard Spikes was an African-American inventor created with  inventing the turn signal and the beer keg tap. Not a lot is known  about his personal life except that he was â¦ declared legally blind  in 1962, the same year he passed away. Answered.
There are 56 calories in 1 thin slice of Roast Beef. Calorie breakdown: 60% fat, 0% carbs, 40% protein.
Calories by Cut of Meat. A 3-ounce serving of pot roast made from beef chuck from under the blade and trimmed to remove the fat has about 184 calories. Use beef shoulder, and the same-sized serving has 170 calories, and a 3-ounce size of pot roast made from beef chuck arm has about 180 calories. The grade of meat also makes a difference in the calories.