APPENDIX a 



449 



25 Thermometer at 6 a.m., 67°; at 12, 87°; at 6 p.m., 82°. Clouds 

 from E. ; sometimes clear away at sunset ; sometimes last all 

 night. Invariable cloud-bank of purple nimbus in W. • 



26, 27 On both these days tourbillons, or devils, of light dust, filling 

 houses. 



28 — 31 Too sick to observe. 



Eemaeks. — Early summer. The earth is dried up with want of 

 moisture ; and in IJnyanyembe the dews, except during the rains, 

 are light. 



The weather is monotonous. The morn cold, raw, and bright. 

 The sun begins to tell at about 9 a.m., and at 10 a.m. rises a high 

 wind from the N. and E., cooled by evaporation, and pouring from 

 the hill-lines that flank the plains. It is considered very unwhole- 

 some. Fleecy clouds appear at noon, increase in volume and depth, 

 and disappear about sunset, which is bright and clear, except when 

 a thick cloud-bank occupies in straight line the western horizon. 

 Kii^hts often cool, and sometimes still and ' muggy.' 



The Kaus, or S.AV. monsoon, is supposed to blow from April to 

 the end of Kovember, when it is succeeded for 4 months by the 

 Kazkazi, or N.E. monsoon. Such are the seasons at Zanzibar. In 

 Unyamwezi, however, the E. wind seems to last all the year. 



VOL. II. 



29 



