"But the wise answered saying, Not so; lest there be not enough for us and you: but go ye rather to them that sell, and buy for yourselves."—Matt. xxv.
211. Why would not the same effect arise if the plate were of a black or dark substance?
Because black and dark substances are not good reflectors of heat.
212. What are the best reflectors of heat?
Smooth, light-coloured, and highly polished surfaces, especially those of metal.
213. Why does meat become cooked more thoroughly and quickly when a tin screen is placed before the fire?
Because the bright tin reflects the rays of heat back again to the meat.
214. Why is reflected heat less intense than the primary heat?