Remarks.—Therm. hung to fore-pole of ridge tent, mercury height of man’s eye. Tent always facing N.
Morning fine, cool, clear, and still.
Clouds, chiefly cumulus. E. wind sets in between 10 to 11, with clouds. Noon, fleecy clouds, cirri, and cumuli, sun obscured, cool air, and high cold E. wind. Sun fiery between clouds, which, when thick, arrest wind. Evening clear, cool, and pleasant. Wind sometimes veers to W. Hottest part of day, because wind arrested between noon and 3 p.m. often a veil of mist-cloud. Night still and cloudy, with raffales of cold high E. wind. Nimbus and cumulus. Air often mild and genial. Night, wind sometimes mild, and W. but rarely. Often a film of mist, and the moon and stars in haloes.
In Ugogo the E. wind is sensibly warmer than Umyanwezi, and presents less contrast with the surrounding atmosphere. Tourbillons are frequent and violent. The average heat at 9 a.m. was 97°; at 3 p.m., 100°.
OBSERVATIONS MADE AT MARENGA MK’HALI, UHEHE, WESTERN USAGARA, AND UZIRAHA IN KHUTU, DURING THE MONTH OF DECEMBER, 1858.
DAY
1 Ziwa. Temperature of air at sunrise, 68; at 4 p.m., 100; at sunset, 80. Cool, cloudy morn. Hot, close, glaring day. Cool evening.
2 Marenga Mk’hali. Temperature of air at sunrise, 70; at 4 p.m., 101; at sunset, 82. Air cooled by distant rain. Fiery bursts of sun. Heavy clouds at night. Lightning from N. and E.
3 Marenga Mk’hali. Temperature of air at sunrise, 69; at 4 p.m., 101; at sunset, 80. Cloudy morn till 8. Clouds at noon. Heavy shower with thunder and lightning from E. at 1 p.m.