HEINIUCII WILIIELM DOVE. 385- 



the circle of professors to which lie was freely admitted. Bessel's 

 active and brilliant mind fascinated him. At Bessel's house, he met 

 the cousin of his future wife, Adolph Erman (afterwards Bessel's son- 

 in-law ). and a friendship was formed which ripened into intimacy 

 when both were afterwards in Berlin. Jacobi, soon to become illus- 

 trious as a mathematician, had resided in Kbnigsberg since 1824, and 

 was nearly of the same age as Dove. F. E. Neumann, destined to 

 the place of Professor of Optical Mineralogy, was a Privat-docent in 

 182G. Moser, the future Professor of Physics, and the associate editor 

 with Dove of the first four volumes of the Repertorium der Physik, 

 was also a member of this sympathetic group of scientific worthies. 

 Notwithstanding all these congenial surroundings, Dove's heart turned 

 fondly to Berlin, and in 1828 he visited that city to attend the gath- 

 ering of scientific men under the auspices of Humboldt. Dove's 

 talents were recognized by Humboldt, and a friendship began there 

 and then, which ended only with the life of Humboldt. Dove co- 

 operated with Humboldt in the term-day observations of the magnetic 

 elements for the earth, and he was the first of many others, united in 

 the same work, to publish his observations. The year 1828 was the 

 turning point in Dove's destiny. Then was formed the engagement 

 to the lady whom he married in 1830 at Berlin. Although he had 

 been accustomed from his youth to a simple style of living, a change 

 of residence was soon rendered necessary by the requirements of his 

 family, and. in spite of the remonstrances of the minister Altenstein, 

 he removed to Berlin. 



Dove began his new labors by teaching physics and mathematics in 

 the Gymnasium, in a girls' high school, and in the Institute of Technol- 

 ogy. In 1841, he succeeded Paul Erman in the Military School and 

 in the School of Artillery. He was soon made Extraordinary Professor 

 of Physics in the University ; and, finally, in 1845, Ordinary Professor. 

 But his salary was never large ; and he continued his instruction in 

 the Institute of Technology until he was sixty years old, and in the 

 Military School until the year 1877. after paralysis had warned him of 

 his increasing infirmities. The latter position was valuable to him, as 

 it secured for him a residence in the third story of the War Building, 

 where he lived for many years, and where he died. 



For half a century, Dove was a hard-working and painstaking 

 teacher. During many of these years he taught general physics in the 

 Gymnasium for eight or twelve hours a week, and to all the classes. 

 Mathematics required of him an equal amount of time. His instruc- 

 tion in the Schools of War and Technology, and in the University, 

 vol. xv. (n. s. vii.) 26 



