The Child's Book of Nature for the Use of Families and Schools Intended to Aid Mothers and Teachers in Training Children in the Observation of Nature. Revised Edition. Part 3: Air, Water, Heat, Light, etc. (1886)
138 THE DIFFUSION OF HEAT. Air a poor conductor of heat Experiment on a stove. … the others. Next is the iron ; next, the zinc ; next, the lead ; next, the marble; and, last of all, the brick. In air that is kept still heat spreads very slowly ; but heat, when it can, always sets air in motion. I have told you, in Chapter XIII., how heated air rises and cold air takes its…
