Those which have acid in their ash, have orange, pink, or red flowers.
N. B. Anti-acids (like soda) are called alkalis.
Q. Why are some things black?
A. Because they absorb all the rays of light, and reflect none.
Q. Why are some things white?
A. Because they absorb none of the rays of light, but reflect them all.
Q. Why are coals black?
A. Because they absorb all the rays of the sun which impinge upon them, and stifle their reflection.
Q. Why is snow white?