Note 26 — GHÁNAH — Aúdaghost — Aúlíl.

In Nubia showers of rain are of rare occurrence north of the 18th parallel (Rüppell, Reisen in Nubien, &c. p. 75). Denham (Travels, &c. I. p. 164) fixed the first appearance of fresh vegetation and the limit of the tropical rains on his route to Bornú, near the 16th parallel, which is probably too low for the limit of rain. Tomboktú, we are told, has annually six weeks or more of rain (Proc. Afr. Assoc. I. p. 285; Narrative of R. Adams, p. 42)—and this blessing seems to extend some distance north-eastward of it (Riley’s Narrative, p. 346). Towards the coast the gum forests which extend as far north as the 18th degree of latitude probably do not fall far short of the limit of regular rains.