were placed in him. His judgment, which was guided by the strongest 

 feeling of rectitude, was highly valued. Another important trait was 

 his unbending and firm faithfulness to duty, to which he was true in 

 all affairs of life up to his death. Even on his last bed of sickness he 

 held an examination. He was the best and most affectionate of 

 fathers, fully entering into the joys of his children. He himself 

 supervised the schoolwork of his children. He was simple and 

 natural in his intercourse and possessed of a rare modesty. He was 

 never tired of sacrificing himself in cases of necessity, and though 

 immersed in abstract studies he always kept a warm heart for every- 

 thing human. He was a great, noble-minded, good man, whom all 

 who knew more intimately have loved and esteemed, not only on 

 account of his scientific celebrity but especially on account of his 

 noble, manly qualities. 



" His burning patriotism did not permit him to stay idly at home 

 during the war 1870-1. He undertook the leadership of an ambulance 

 corps, which he formed of Bonn students. At the great battles of 

 Vionville and Gravelotte he helped to carry the wounded from the 

 battle and to lessen their sufferings. For his services in this cam- 

 paign he received the Iron Cross. A contusion in his leg which he 

 received on the field of battle caused him great pain for many years 

 and often necessitated his driving to his lectures. On the doctor's 

 advice, at the age of 56 he learnt to ride, and became an excellent 

 horseman. Biding proved very beneficial to his health." 



One of his sons thus writes of him : ' 



" The principal trait in my father's character was, without doubt, 

 the splendid truthfulness of his nature. In his deeds and words he 

 never could tolerate anything ambiguous, and particularly as regards 

 himself he cherished no self-deception. For that reason he never 

 buffered from the discovery of the motives of his actions ; from thence 

 sprang his thoroughly noble nature as well as his great modesty and 

 the delight which he always felt, and was never too proud to express, 

 at the recognition of his work ; from thence his dislike to all smatter- 

 ing and superficiality in which he suspected some untruthfulness. 

 Another remarkable characteristic was the uncommon one of seeing 

 only the best side of his neighbours. He hardly noticed their faults, 

 and when he did he had not the least inclination to cheap mockery. 

 The general impression which he received of people was formed from 

 the more or less strong development of their good qualities and was 

 little dimmed by the presence of this or that defect. His hearty, 

 pleasant, always thoroughly genuine address towards everyone 

 was the result of this trait. Only when he discovered untruthfulness 

 did he take a deep aversion." 



Clausius received the following offers of posts : 



In 1858 to the Polytechnicon of Carlsruhe; in 1862 to the 



