XIX 



The death of his only son, on the 27th of March, 1832, called forth the 

 expression of grief which concludes the Introduction to the 'Theorie de la 

 Lune.' 



HEINRICH ROSE was born on the 6th of August, 1795, at Berlin, where 

 his father, son of the discoverer of the fusible alloy known by his name, was 

 Pharmacist and Assessor of the Superior Medical College. His father 

 died in 1807, leaving behind him a widow and four young boys. H. Rose 

 studied Pharmacy first in Dantzic, where he experienced the horrors of a 

 siege, and nearly lost his life by typhus fever. He served in the campaign 

 of 1815, together with his three brothers, of whom one is Professor 

 Gustav Rose, the distinguished Mineralogist of Berlin. On the conclusion 

 of the war he continued his studies in Berlin, working in Klaproth's labo- 

 ratory during the summer of 1816. In September 1816 he entered the 

 Pharmacy of Dr. Bidder of Mitau. About the end of 1819 he went to 

 Stockholm, where he worked for a year and a half in the laboratory of Ber- 

 zelius, who recommended him to devote himself to the teaching of che- 

 mistry as a profession. On quitting Stockholm he resided for some time 

 at Kiel, where he wrote his Dissertation " de Titanio ejusque connubio 

 cum oxygenio et sulphure," and took the Degree of Doctor of Philosophy. 

 In the summer of 1822 he obtained the sanction to become a private 

 teacher in the University of Berlin, and began a course of lectures on prac- 

 tical analytical chemistry in the autumn of the same year. He was ap- 

 pointed Extraordinary Professor in 1823, and Ordinary Professor of Che- 

 mistry in 1835. He was elected a Member of the Berlin Academy in 

 1832, Foreign Member of the Royal Society in 1842, Corresponding Mem- 

 ber of the Institute in 1843, and was invested with the Prussian order of 

 pour le merite. 



His memoirs on inorganic chemistry and chemical analysis, a department 

 in which he stood unrivalled, to the number of nearly, if not quite, two 

 hundred, are contained principally in Gilbert's and Poggendorff's ' Annalen.' 

 The results of his researches in analytical chemistry are embodied in his 

 ' Handbuch der analytischen, Chemie,' which came out in one volume in 

 1829. A second edition, in two volumes, was published in 1831, a fourth 

 in 1838, a fifth in 1850, the sixth (so thoroughly revised that it should be 

 regarded as a new work) was published in French, at Paris, in 1861. In 

 forming an estimate of the labour expended in preparing this voluminous 

 treatise, it must be remembered that each precept is the result of an expe- 

 riment (frequently of a series of experiments) made by the author. During 

 the last years of his life he was engaged in writing an elementary treatise 

 on analytical chemistry, about thirty sheets of which were printed during 

 his lifetime. For this work also a large number of experiments were made 

 in his laboratory. His activity and industry increased with advancing age. 

 A year before his death he was heard to exclaim, " I have at most only a 

 few years to live, and so much remains to be done!" During the latter 



