1885.] Scientific News. 925 
— Prof. Robert von Schlagintweit, the eminent ethnographer 
and geographer, died June 13th, in Giessen, at the age of 52 
The name of the deceased is chiefly connected with the journey 
of scientific investigation made by him in 1854-7, in Central India 
and the Himalayas, in conjunction with his brothers Hermann 
and Adolphus. The expedition was fitted out at the expense of 
the King of Prussia and the British East India Company, and 
added many important and interesting facts to our knowledge in 
the domains of geography, meteorology, geology, and ethnology. 
An account of the journey was published in English under the 
title of “ Results of a Scientific Mission to India and High Asia.” 
Prof. Robert von Schlagintweit also traveled in North America, 
and wrote several shorter works on his experiences there. 
— Mr. Mellard Reade’s presidential address to the Liverpool 
Geological Society has been reprinted in the form of a pamphlet 
entitled “ Denudation of the two Americas.” The essay may be 
regarded as a sequel to the address in which he discussed the 
effects of chemical denudation as a geological agent. He insists 
strongly on the importance of applying quantitative methods to 
K the study of geological phenomena. In.the present paper he 
calculates the amount of solid matter removed in river-water 
from the surface of some of the principal river-basins of America. 
Mr. Reade thinks that the matter which exists in chemical solu- 
tion in river-water has more importance as a factor in the recon- 
struction of the earth than is generally recognized by geologists. 
—English Mechanic. 
— Prof. C. V. Riley, entomologist of the United States De- 
partment of Agriculture, has published Bulletin No. 8, with 46 
pages on the periodical or seventeen-year Cicada, comprising an 
account of Cicada septendecim and its tredecim, or thirteen-year 
. race, with a chronology of all broods known. A circular has also 
been issued by the Division, containing lists of localities where 
these two races last appeared, and a request for information re- 
garding the appearance of the insect during the past season. 
Brood xx11 of Septendecim appeared in 1868, locally, in the fol- 
lowing States: New York, Massachusetts, Vermont, Pennsylva- 
nia, Ohio, Indiana, Michigan, Delaware, Maryland, District of 
Columbia, Virginia, Kentucky, and Georgia. 
Ridgway ; while Mr. W. H. Dall describes some Hydrocor- 
