MAGNETIC TELEGRAPH. 



to spend hours in sweet and instructive converse 

 with this gifted mortal, to whom the whole book of 

 nature was an open volume, out of which he ever 

 read lessons of wisdom, and beauty, and truth. 



As Professor Henry appeared in 1839, so he con- 

 tinued till 1847, with but little change in the 

 physical man only that change, which, like the 

 changes in the early autumn, lightly touched with 

 tints of exquisite beauty the mature growth of 

 spring-time and summer ; and then, with extreme 

 reluctance, he departed from Princeton, called by 

 his country to lay down the arms with which, as 

 a soldier in the ranks, he had been waging his war- 

 fare against ignorance, and take command of the 

 intellectual forces to be summoned and organized 

 by him in the same glorious cause. 



Born in the dying moments of the eighteenth 

 century, his age was marked by the numbers 

 denoting the years of the nineteenth. Like the 

 century, with whose growth his growth kept 

 pace, he had developed with almost unexampled 

 rapidity; and at the age of thirty-two, when he 

 took his chair here, although "he was but a 

 "youth, and ruddy, and of a fair countenance," 

 and was armed only with a simple sling of his 

 own construction, and pebbles from the brook 

 of nature, he was equal to the trained warriors 

 of maturer growth and superior armor, waging 

 war against the Goliah that guarded the unex- 



