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In the alimentary canal are certain pointed eminences called villi, and certain ridges called valvuloe conniventes. The makers of heating apparatus have exactly reproduced the first in the "pot" of their furnaces, and the second in many of the radiators to be seen in our public buildings. The object in the body and the heating apparatus is the same; to increase the extent of surface.
In the alimentary canal are certain pointed eminences called villi, and certain ridges called valvuloe conniventes. The makers of heating apparatus have exactly reproduced the first in the "pot" of their furnaces, and the second in many of the radiators to be seen in our public buildings. The object in the body and the heating apparatus is the same; to increase the extent of surface.
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