256 
ville monograph. The close and confidential 
relation with Dr. Emmons, who was one of the 
most careful and accurate of American geol- 
ogists, as well as one of the best of men, was 
extremely influential upon the younger man. 
Trying also had experience while connected 
with the U. S. Geological Survey in the Globe 
district of Arizona; at Park City, Utah; m 
the Needle Mountains and at Lake City, Colo- 
rado; and in the coal regions of Indiana and 
Pennsylvania. In his later years he visited 
the western states and Alaska on mine ex- 
aminations and in connection with apex liti- 
gation. 
His first teaching experience came in 1903, 
when he substituted for Professor Wilbur C. 
Knight for a year at the University of Wyo- 
ming. He was called to Lehigh University in 
1904, and to the Sheffield Scientific School of 
Yale in 1907. His work as editor began in 
1905 when the magazine Hconomic Geology 
was established and he was the choice of its 
directors for managing editor. 
Professor Irving has left a very creditable 
series of papers, which were issued during his 
connection with the U. S. Geological Survey. 
His work is marked by accuracy and patient 
care. He was not only a good observer, but 
possessed abilities of description and inference 
of a high order. In this group of his contribu- 
tions the most elaborate will be the revised 
monograph on Leadville. While the funda- 
mental observations and data were accumu- 
lated under Dr. S. F. Emmons’ oversight and 
in no small degree by him personally, Dr. 
Emmons died when he had only prepared a 
few pages of introductory manuscript and the 
main work of composition was completed by 
Professor Irving and was done with scrupu- 
lous and almost filial devotion. 
As editor of Hconomic Geology Dr. Irving 
was tireless and persevering. In large degree 
his efforts to secure papers brought to its 
pages the long list of striking and timely con- 
tributions with which they are crowded. He 
obtained thereby a wide and intimate acquaint- 
ance with topics of interest. He himself 
made especially thoughtful and suggestive 
contributions on the criteria for identifying 
SCIENCE 
[N. 8. Vou. XLVIIT. No. 1237 
replacement-deposits; on the causes which 
localize ore-shoots; and on the importance of 
having the same observer study large problems 
in many localities, rather than work out the 
details and teachings of a single district. 
Dr. Irving had a fine sense of clear and 
finished literary expression, as might justly 
have been expected of one whose direct for- 
bear was Washington Irving’s brother; and 
whose father’s work was marked by the same 
characteristics. In disposition he was con- 
siderate, kindly and affectionate, such that he 
was greatly endeared to his friends. 
When German ambitions and hostility in 
the spring of 1916 began to threaten the 
United States with the grim possibility of 
war, Professor Irving went to the officers’ 
training camp at Plattsbure. Being unmar- 
ried he felt it his duty to fit himself for service 
and at the close of the training period handed 
in his name as available if needed. In the 
spring of 1917 he was called and passed his 
examinations fora captaincy. He was com- 
missioned in the 11th U. S. Engineers, “the 
fighting Engineers ” as they have been known 
since Cambrai. He sailed for France in July, 
1917, and had been building railroads and 
giving instruction to young officers in mining 
engineering as long and continuously as he 
was able. His strength became overtaxed, and 
when an attack of Spanish grippe developed 
into pneumonia, he could not resist it. He 
passed away July 20, in Flanders, and his 
name was entered on the Roll of Honor. 
JameEs F. Kempe 
RACE-APPRECIATION IN LATIN 
AMERICA. 
ANTHROPOLOGISTS, in their elaborate, careful 
and invaluable researches into the past his- 
tory of the native race of the American con- 
tinent, have been wont to devote the major 
part of their space to the former cultural at- 
tainments of that race. They ignore the fact 
that, in Mexico, in some of the Central Amer- 
ican countries, in Colombia, and in the An- 
dean countries (Ecuador, Peru and Bolivia), 
that race is to-day anywhere from sixty-five to 
_ eighty-five per cent. of the total population. 
