286 JOSEPH HENRY, LL.D. 



justed." This was the first " sounding " electro- 

 magnetic telegraph. With this growing fame he 

 was not disposed to think too highly of himself. A 

 friend, noticing a look of sadness in the face of the 

 young professor, said to him, " Albany will one 

 day be proud of her son ; " and so it proved. 



A year before this, in May, 1830, Professor 

 Henry had married, at thirty-one, Harriet L. Alex- 

 ander of Schenectady, N. Y., a cultivated and help- 

 ful woman. 



In 1832, Princeton College needed a professor 

 of natural philosophy. Henry's friends heartily 

 commended him for the position. Silliman said, 

 " Henry has no superior among the scientific men 

 of the country," and Professor Kenwick of Colum- 

 bia College, New York, said, " He has no equal." 



After six years at the Albany Academy, Henry 

 removed to Princeton, where for fourteen years he 

 added constantly to his fame and usefulness by 

 original work. Of his discoveries in these fruitful 

 years he gives the following summary, at the re- 

 quest of a friend : 



" I arrived in Princeton in November, 1832, and, 

 as soon as I became fully settled in the chair which 

 I occupied, I recommenced my investigations, con- 

 structed a still more powerful electro-magnet than 

 I had made before, one which would sustain over 

 three thousand pounds, and with it illustrated 

 to my class the manner in which a large amount of 

 power might, by means of a relay magnet, be called 

 into operation at the distance of many miles. . . . 



