b. 5. Alto-stratus.
C. Lower clouds, 2000 m.
a. 6. Strato-cumulus.
b. 7. Nimbus.
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.
10. Stratus.
Explanations.