4 BULLETIN" 1422, U. S. DEPAETMEXT OF AGEICULTUKE 
PERSONNEL OF THE EXPEDITION 
The expedition from the United States Department of Agriculture 
was composed of Carl D. La Rue, specialist in rubber investigations, 
in charge of the party; James R. TVeir, pathologist in rubber investi- 
gations; and E. L. Prizer, field assistant, and Morris K. Jessup, field 
assistant, who did the photographic work for the party. 
In Para the party joined forces with another from the United 
States Department of Commerce, and to collaborate with these 
American investigators the Brazilian Government appointed a com- 
mission consisting of Hannib al Porto, chief; Avellino Oliver a, geolo- 
gist and later chief of the commission; Gerardo A. Kuhlman, bota- 
nist; Raymundo Monteiro da Costa, rubber specialist; and Fernando 
Solidade, physician. 
Fig. 1.— The Andird, the boat which was chartered and equipped by the Brazilian Govern- 
ment for the use of the three expeditionary parties. The Andird is a fine example of the type 
of boat common on the Amazon and its tributaries 
ITINERARY 
The Brazilian Government had chartered and equipped a com- 
modious and comfortable river boat, the Andird (fig. 1), for the use 
of the American and Brazilian investigators, and on this they pro- 
ceeded to Manaos and later to Porto Velho, the limit of navigation 
on the Madeira River. From this point the Madeira-Mamore 
Railway carried the travelers to Guajara Mirim, on the Mamore 
River, whence they proceeded by bateiaoes (broad-bottomed strongly 
built river boats) and canoes up the Mamore to the Pacanova River, 
thence up this to the Ouro Pre to River, and finally for a distance 
up the Ouro Preto into the jungles of Mat to Grosso. From Matto 
Grosso the party returned to Villa Murtinho at the mouth of the 
Rio Beni, which stream they ascended to Riberalta and from that 
