1884. 67 Trans. N. Y¥. Ac. Sci. 
1807 ; educated at Neufchatel, Stuttgart, Carlsruhe, and Berlin; 
graduated in 1835, and studied theology ; spent the years 1835 and 
1839 in Paris ; was Professor of History and Physical Geography 
at Neufchatel from 1839 to 1848. In common with his associates 
Acassiz and Desor, he entered earnestly upon the study of the 
Alpine glaciers, when the fact of their former great extent was 
made known by CHARPENTIER. He took, as his special duty, the 
study of the distribution of Alpine boulders and the former reach 
of the glaciers. This study was continued during seven years, and 
the results were embodied in a large detailed map, which, unfortun- 
ately, has never been published. The publication of the obser- 
vations of Acassiz, Guyot, and DrEsor was begun in the “ Sys- 
téme Glaciére.” Only one volume was printed. In 1848, Guyor 
came to the United States, and, in 1849, published a volume with 
the title ‘‘ Earth and Man,” which was an abstract of a course of 
lectures delivered by him in Boston, in the French language, and 
translated by Professor FELTON. 
He was then employed by the State of Massachusetts and the 
Smithsonian Institution, to organize a system of meteorological 
observations and publish a manual of directions for observers, in 
1850. In 1851, he published a volume of meteorological and 
physical tables. In 1855, he was appointed Professor of Geology 
and Physical Geography at Princeton, where he remained until his 
death. During his vacations he studied the structure of the Alle- 
ghanies from Maine to Georgia, publishing a summary of his 
observations in the American Journal of Science for 1861. Be- 
tween 1866 and 1875, he published a series of school geographies 
and maps, for which a medal was awarded at the Vienna Exposi- 
tion in 1873. The personal character of Professor GuyoT was 
singularly pure and sweet. He was not only respected, but loved, 
by all his students and associates, and a large circle of scientific 
friends. He probably had not an enemy in the world. He was 
remarkably methodical and industrious in his habits, had a clear 
and logical mind, and every year made some important contribu- 
tion to the stock of useful knowledge possessed by man. No just 
estimate of the value of his scientific work can be given in few 
words. He is, perhaps, more widely known by his connection 
with the study of the Alpine glaciers, which resulted in the dis- 
covery of an Ice period in the world’s history. 
