In skillet, brown hamburger adn drain thoroughly. Add onion, carrots, celery and cabbage. Combine tomato paste, worcestershire sauce and beef stock/bouillon. Add to crock pot, with Hamburger an stir to blend. Cover and cook on low setting for 8 to 10 hours, or high setting for 3 to 4 hours. NOTE: This is an updated version of an old chuckwagon recipe. They would use finely diced beef and the vegetables and let them cook all day at roundup time.