D. _Clouds of Diurnal Ascending Currents._
a. 8. Cumulus, apex 1800 m., base 1400 m.
b. 9. Cumulo-nimbus, apex 3000 m. to 8000 m., base 1400 m.
E. _High Fogs_, under 1000 m.
Encyclopaedia Britannica, 11th Edition, "Clervaux" to "Cockade" Volume 6, Slice 5 · 第 27 / 41 题