1812. 
COMPARATIVE BOTANY. — WEATHER. 
259 
the globe, many examples might be given, if the present were a work 
exclusively on that science: even at our next station, other plants 
were found of correspondent stamp. 
19ih. Although we were now in the middle of winter, the 
weather during sunshine was generally very pleasant and well suited 
for travelling and hunting ; but the nights were exceedingly cold, 
and not easily to be endured without a fire. The mercury of the 
thermometer never rose above 70 of Fahrenheit's scale (21* of the 
Centigrade scale) and was seldom observed even so high. This 
moi'ning, just before sunrise, an hour which was always found to be 
the coldest in the whole twenty-four, it was found sunk to 29 ( — 1-6 
Centig.) ; and the backs of the horses, as well as the herbage, were 
white with hoar-frost, an appearance not indeed very frequent, but still 
not so rare as to be considered by the natives a very remarkable sight. 
In the time of the rains, water may be found here in the hollows 
of a channel which appeared to be at some seasons, the bed of a small 
rivulet ; but at present not a drop was any where to be discovered ; 
and as our cattle had not drunk since we left Bloem's Fountain, we 
were compelled to depart from Sensavan early in the morning. 
