Art and Artists--Pennsylvania--Philadelphia--19th Century Animal Husbandry Art and Artists--19th century Art and Artists--Technique--19th century Art, Modern--19th century--History Art--Study and teaching Artists--Pennsylvania--Philadelphia--19th century Birch, William Russell Chevaux Courtship--19th Century Dioramas--19th century Diseases Élevage Horse Diseases Horses Maladies Médecine vétérinaire Philadelphia Views--19th century Sartain, John Veterinary Medicine Veterinary medicine animal husbandry (activity) veterinary medicine