M. Fischer's A tenwir of the Life of Klaproth. 321 
trial, became superintendant of the office of Rose, in which a 
greater number of distinguished chemists were formed than in 
any other, since, beside the elder Rose and Klaproth, this office 
afforded a larger or smaller portion of their education to Hermb- 
stadt, Gehlen, Valentin, the younger Rose, and several other 
excellent pharmacopolists. Klaproth not only superintended this 
office for nine years, with the most exemplary fidelity and con- 
scientiousness, but, what particularly displayed his honourable 
character as a man, he himself undertook the education of the 
two sons of Rose, as if he had been a second father to them. 
The younger of the two died when he had scarcely reached the 
age of manhood. The elder, whom, after his own example, he 
permitted to pass from the study of theology to that of medi- 
cine, became in after life his most intimate friend, and the asso- 
ciate of all his scientific researches. Several years before the 
death of Rose, which happened in 1808, much too soon for 
science, they wrought together, and Klaproth was seldom satis- 
fied with the results of his experiments, till they were repeated 
by Rose. Klaproth often asserted to the author of this memoir, 
that, in regard to many of his discoveries, as, for instance, with 
respect to the important method of analysing by means of ba- 
rytes, he scarcely knew whether the merit of the discovery was 
more to be ascribed to himself or to Rose. Like Valentin Rose, 
all the other members of the worthy family of Rose honoured 
Klaproth with the attention of children till his death. 
In the year 1780, when Klaproth was thirty-seven years of 
age, he went through his trials for the office of Apothecary, with 
distinguished applause. His Thesis, “ On Phosphorus and dis- 
tilled Waters,” was printed in the Berlin Miscellanies for 1782. 
Soon after this, Klaproth bought what had formerly been the 
Flemming Laboratory in the Spandau Street, and he married 
Sophia Christiana Lehman, with whom he lived till 1803 (when 
she was taken from him by death), in a happy state of marriage, 
the fruits of which, three daughters and one son, now survive 
their parents. He continued in possession of this laboratory, in 
which he had arranged, for his scientific labours, a small work- 
room of his own, till the year 1800, when he purchased the 
room of the academical chemists, in which he was enabled, at 
the expence of the academy, to furnish a better and more spa- 
