Head wat is ns of tut 13akima. 
passage of bouts, and the important cataract Mekorerussa, which the 
party reached in the afternoon, accordingly constituted the tirst but 
at the same time insurmountable stoppage: up to this point the Barima 
would offer the most suitable highway for steamers. According to the 
concurring statements of the Indians, my brother and Mr. Glascott were 
the first white people who had ever penetrated so far, a statement that 
was confirmed by the fact that the course of the Barima proved to be 
quite different from what had hitherto been laid down in the maps. 
This observation determined them to continue their trip so far as the bed 
of the stream allowed. Fall now followed upon Fall, the largest of which 
the Indians called Uropocari. Although the river maintained its previous 
breadth, it nevertheless proved actually full of granite, until quartz, regu- 
larly disposed in layers, soon after made its appearance on the surface. 
During the course of the following day, after passing the mouth of many 
a moderately large stream in the Barima, particularly the Wanama and 
Mehokawaina, an insurmountable obstacle presented itself to their 
further progress in the innumerable trees which, tumbled one over 
the other, crossed (he river in all directions. They accordingly gave up 
the corial with which Mr. Glascott remained behind, my brother continu- 
ing on foot in the company of several Indians. Their progress was ren- 
dered difficult by numerous swamps and they had to fight (heir way 
slowly through with an axe at every step. On the 1st July, after a long 
interruption, they struck again on a tributary of the Barima, which even 
the Indians did not know of, because none of them had ever gone so far 
Owing to the numerous granite boulders that filled its bed, my brother 
called it Rocky River. The Barima still showed a breadth of 30 feet here 
where it coursed out of (lie W.H.W. and its bed was frequently intersec- 
ted by granite ridges. The whole vegetation testified to an unusual 
fertility of soil. The want of victuals which made itself now felt forced 
them to return, while the continuous rains had made it impossible for 
them to take any astronomical data. The meteorological observations 
on the other hand gave the following results: — 
Record. 
Barometer. 
Thermometer Fahrenheit. 
Highest. 
In Inches. 
Attached Ther- 
mometer Fah- 
renheit. 
Dry Bulb. 
Wet Bulb. 
30.088 
80.5 
80.0 
78.5 
Lowest. 
29.942 
71.4 
71.0 
70.0 
Mean of 37 
observations 
taken hourly. 
30.007 
75.50 
75.30 
74.2 
The return journey down the Barima, hastened by the strong current, 
was accomplished in two and a half days, whereas the voyage up had 
lasted six. 
