Oliver Pay son Hubbard. — Hovey. 361 
active throughout his long Hfe, and which determined his 
occupation for many years. In February, 1836, he was ap- 
pointed professor of chemistry, mineralogy and geology in 
Dartmouth College, a position which he held for thirty years. 
After resigning this professorship in 1866, he continued his 
lectures on chemistry and pharmacy in the medical depart- 
ment of the institution until 1883, when he was made pro- 
fessor emeritus. He was an overseer of the Thayer School of 
Engineering of Dartmouth College from 1867 to 1895. He 
received the degrees of M. A. from Yale and Dartmouth, of 
M. D. from South Carolina Medical College and of LL. D. 
from Hamilton College in 186 1. He served one term, 1863- 
1864, in the legislature of New Hampshire. 
Prof. Hubbard was one of the founders of the Association 
of American Geologists and Naturalists, Philadelphia, 1841, 
and of the American Association for the Advancement of 
Science, Philadelphia, 1848. He maintained his membership 
in the latter organization and was one of the six "founders" 
still alive at its last meeting. Pie was recording secretary of 
the New York Academy of Sciences from 1876 to 1885, vice- 
president from 1885 to 1892 and president, 1892-1893, — evi- 
dence of his long-continued and active interest in the propa- 
gation of science in general. 
The subject of this sketch belonged to a period of scientific 
work when specialization had not attained the importance 
which it has held for- the past twenty or thirty years and we 
therefore find Prof. Hubbard's published articles dealing with 
a rather wide range of topics. His geological work was prac- 
tically confined to the earlier half of his life and was not ex- 
tensive, measured by present standards, as will be seen by an 
inspection of the appended bibliography. He was the first 
(1838) to call attention to the dikes of basic rock ("trap") at 
the falls of the Pemigewassett river in Campton, N. H., which 
were made famous many years afterward by the petrographic 
investigations of Dr. C. W. Hawses. Prof. Hubbard described 
many other dykes in the White Mountain region and con- 
tended for the igneous origin of the granite as well. He also 
made interesting observations on the occurrence of a number 
of minerals in New Hampshire and northern New York and 
