Book 3 — Raising the Temperature of a Room
Reading edition
The temperature of a room may apparently be raised several degrees with the same expenditure of heat, and greater comfort will result by the application of a simple principle. In summer a moist day seems warmer than a dry one though the thermometer registers the same. By permitting steam to escape from a radiator or keeping a kettle boiling on the stove, the air is moistened and feels warmer.