XXL 
phical and Geological Commission of the State of S. Paulo, who has so 
long and successfully studied the geology of S. Paulo, as well as many 
other states of Brazil, the writer is especially indebted for very helpful aid 
and interest in the work of the Commission. 
Also to Dr. Joao P. Cardoso, the present Director of the S. Paulo G. 
and Geol. Commission, and his official force, the Commission is indebted 
for many favors. 
The Directors of all the railways of South Brazil were exceedingly 
kind to the Commission in aiding its work with special service when- 
ever requested. 
The Commission is under obligations for especial favors to the fol- 
lowing gentlemen of Rio Grande do Sul: Mr. Otto Spalding, General Su- 
perintendent of the Companhia Estrada de Ferro e Minas de S. Jeronymo, 
Xarqueadas, Dr. Eugenio Dahne, the distinguished engineer and geologist, 
Dr. G. Vauthier and Dr. F. Nonnenberg, Dr. Jorge Benedicto Ottoni. 
To the following gentlemen of Parand: Colonel Joaquim Macedo, 
Mr. Romario Martins, Dr. Joao Carlos Gutierres, Dr. Roberto Helling, 
Dr. J. Westermann. 
To the following gentlemen of Rio de Janeiro, the writer, as well as 
the Commission, is under many obligations for numerous favors re- 
ceived : 
Dr. Castro Barbosa, of the Municipal Council ; 
Drs. Miguel Arrojado Lisboa, and Teixeira Soares, the eminent 
engineers of Petropolis, Dr. C. Miranda Jordao ; 
Hon. David R. Thompson, Ex U.S. Minister to Brazil now Am- 
bassador to Mexico ; 
Hon. Eugene Seeger, Consul General of the U.S. A. ; 
Dr. Falke, Consul General of Germany ; 
Mr. Lilbourn Cave Irvine, Ex Vice-Consul, U.S. A.; Mr. George A. 
Chamberlain, Ex Vice-Consul, U.S. A. 
To the following gentlemen the Commission is under many obliga- 
tions for many favors received : 
Snr. E. Ferreira de Camargo of S. Paulo, and Dr. Nicoléo Peder- 
neiras, Dr. Fausto de Souza, Snrs. Alfredo Pessi, Angelo Bianchin e 
Pedro Marcellino de Carvalho of Santa Catharina. 
To the United States Geological Survey, and its able Director, 
Dr. Chas. D. Walcott, the Commission is especially indebted for the 
courtesy of its great Coal Testing Plant at St. Louis, Missouri, on 
account of the tests therein made of Brazilian coal under the supervi- 
sion of Dr. J. A. Holmes. 
