164 NATIONAL ACADEMY OF SCIENCES 
for a period of more than forty-one years, during which both 
the Mexican War and the Civil War occurred. ‘“ His teachings 
bore glorious fruit upon the fields of Mexico,” and during the 
Civil War, “ with hardly an exception on either side, those who 
had studied under Professor Mahan had won the highest 
laurels.” (Abbot.) 
Mahan published many text-books on civil and military 
engineering. ‘These comprised a “ Treatise on Field Fortifica- 
tions” (1836), “ Course of Civil Engineering ” (1837), one on 
‘““Permanent Fortifications,” ‘“‘ Advanced Guard, Outpost and 
Detachment Service of Troops” (1847), “ Industrial Drawing ” 
(1855), and “ Treatise on Fortification Drawing and Stere- 
otomy ” (1865). Some of these works passed through several 
editions. His treatise on civil engineering was reprinted in 
England and also translated into several foreign languages. 
Professor Mahan also published an American edition of 
Moseley’s “‘ Mechanical Principles of Engineering,” in which 
many of his own ideas were incorporated. This was originally 
published in 1856 and reprinted in 1869. 
In 1871, on account of his advanced age and impaired health 
he was recommended by the board of visitors to the Academy 
for retirement, and although the President gave him assurances 
that no action would be taken on the recommendation, he was so 
deeply wounded in spirit that overcome by dejection he threw 
himself from the steamboat on which he was journeying to New 
York to consult his physician. 
(From Henry L. Assot, in Biographical Memoirs of the National Academy 
of Sciences, vol. 2, 1886, pp. 29-37.) 
JOHN STRONG NEWBERRY 
Born, December 22, 1822; died, December 7, 1892 
General Roger Newberry, grandfather of John S. Newberry, 
was one of the proprietors of the Connecticut Land Company, 
which owned the northern part of Ohio, known as the Western 
Reserve. His son, Henry Newberry, located his father’s land 
on the Cuyahoga River and founded there a town, to which he 
