690 THE POPULAR SCIENCE MONTHLY. 



berg lie worked in the university laboratory under the guidance 

 of Bunsen, and attended lectures by Kirchhoff, Kopp, and Von 

 Leonhard; during his sojourn in Heidelberg he took no part in 

 the objectionable practices of the " Studenten-Corps," yet became 

 so popular in the laboratory that at the beginning of the third 

 semester he was elected by the students their " Polizei." 



After a summer semester in Gottingen under Friedrich 

 Wohler, where he began research for a thesis, he went to Berlin, 

 where he was admitted to the private laboratory of Prof. A. W. 

 von Hofmann, the university laboratory not being as yet con- 

 structed. His position under Hofmann was a most agreeable one, 

 and may be called that of pupil-assistant, as he worked at re- 

 searches for Hofmann without any pecuniary compensation either 

 to or from the university. For eix months he was the sole pupil 

 with Hofmann, but later he shared his table with the late Dr. Paul 

 Mendelssohn-Bartholdy. In 1866 he took the degree of Doctor of 

 Philosophy at Georgia Augusta University, Gottingen. Dr. Bol- 

 ton's residence in Berlin was saddened by the death of his father, 

 after a lingering illness, February, 1866. 



During his five years' sojourn in Europe Dr. Bolton spent the 

 long summer vacations in travel, chiefly in Switzerland and the 

 Austrian Tyrol ; he visited every canton in Switzerland on foot, 

 and became an expert Alpine climber, ascending among other peaks 

 the Titlis, the Col du Ge'ant, the Cima di Jazzi, and Monte Rosa. 



In the years 1866 and 1867 he made more extended journeys, 

 traveling leisurely in Italy, Spain, France, Holland, Russia, and 

 Scotland. In August, 1867, he returned to the United States, and, 

 continuing his travels, went from Canada to Mexico. Settling in 

 New York the following year, he opened a laboratory for private 

 research, and eventually took a few pupils. In 1871 he spent five 

 months in travel, visiting California and Washington Territory. 

 In 1872 he was invited to the position of assistant in analytical 

 chemistry at the School of Mines, Columbia College, under Prof. 

 Charles F. Chandler. This position he accepted, and he had 

 charge of the laboratory of quantitative analysis for five years, 

 also giving lectures on the subject during the last year. Mean- 

 while, in 1875, he was elected to the chair of Chemistry in the 

 Woman's Medical College of the New York Infirmary, of which 

 Dr. Elizabeth Blackwell is dean ; here he discharged his duties 

 for three years, until he removed from New York city. 



In 1877 he accepted the chair of Chemistry in Trinity College, 

 Hartford, Conn., a position which he held for ten years. At Trin- 

 ity he planned the interior of the chemical department and moved 

 the apparatus and museum to the new buildings. He had marked 

 influence in the organization of scientific courses, in which he had 

 the co-operation of the late Prof. Louis M. Cheesman, who held 



