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 " ( 1 847) , " 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. Abbot, 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 



