The diagram illustrates the development of a cooking stove through three stages, from a simple stone structure to a more advanced metal-covered design.
Overall, the stove became progressively more complex over time, with additional components being introduced to improve its structure and functionality. While the earliest version consisted of only a few basic parts, the final design incorporated separate sections for burning fuel, supporting cookware, and removing ash.
In the first stage, the stove was extremely simple, consisting of a large stone base with a cooking pot placed directly on top. This basic design offered little protection for the fire and had no features to control airflow or contain fuel.
In the second stage, the stone base was retained but enclosed within a clay structure. A small opening was added at the front to allow fuel to be inserted and the fire to be maintained. This modification made the stove more enclosed and efficient than its predecessor.
The final stage shows a modern stove with distinct upper and lower sections. The lower compartment, which is covered by a metal casing, serves as the combustion chamber and includes a door for adding fuel, improving air circulation, and removing ash. Above this is a grate for supporting charcoal, while the upper section provides a stable surface on which a cooking pot can be placed.