Michael Preston has dubbed this form of riddle the chemical rebus (1982:117).[…]Meanwhile, down in the freshman chemistry office, scores of these same rebi are posted on a billboard for another purpose. Undergraduates use chemical rebi to play with recently acquired knowledge, sometimes to affirm a conceptual mastery which is exceedingly difficult.

The dragon's ire, more fierce than fire, laid low their towers and houses frail.

[H]e disappeared into his house much as a startled weazel makes for its hole.

There are stags of ten roaming abroad unstalked; and perchance that is a hart royal swelling his broad front on yonder scaur.