7. It is believed that sleep is caused by a diminution in the supply of blood to the brain. 8. The fact that mold, mildew, and yeast are plants is wonderful. 9. Napoleon turned his Simplon road aside in order that he might save a tree mentioned by Caesar.
+Explanation+.—Unless in order that is taken as a conjunction connecting an adverb clause of purpose (see (7), Lesson 65), the clause introduced by that is a noun clause explanatory of order. [Footnote: A similar explanation may be made of on condition that, in case that, introducing adverb clauses expressing condition.]
10. Shakespeare's metaphor, "Night's candles are burnt out," is one of the
finest in literature.
11. The advice that St. Ambrose gave St. Augustine in regard to conformity
to local custom was in substance this: "When in Rome, do as the Romans
do."
12. This we know, that our future depends on our present.
The +noun clause+ may be used as +principal term+ of a +prepositional phrase+.
13. Have birds any sense of why they sing?
birds | Have | sense
=======|================ they | sing
| \any \ ——-|———
\ of | \why
\ / \
\——————-
+Explanation+.—Why they sing is an indirect question, here used as the principal term of a prepositional phrase.
14. There has been some dispute about who wrote "Shakespeare's Plays." 15. We are not certain that an open sea surrounds the Pole.
+Explanation+.—By supposing of to stand before that, the noun clause may be treated as the principal term of a prepositional phrase modifying the adjective certain. By supplying of the fact, the noun clause will become explanatory.
16. We are all anxious that the future shall bring us success and triumph. 17. The Sandwich Islander is confident that the strength and valor of his slain enemy pass into himself.