One episode of this TV series sees two men trade a canvas bathtub for some ice cream as a gift to a colleague recovering from a tonsillectomy. Another episode of this series sees an ice cream churn, salt tablets, and insect repellant delivered in the dead of winter, making an already stressful situation worse. Two other food related episodes of this series revolve around a quest to get a Chicago restaurant named Adam's Ribs to send food, and to save a lamb from being eaten for Easter dinner. Identify this series which ran for 250 episodes.
M*A*S*H