142 Linnean Society. [May 24, 



tion of his researches ; and his ' Prodromus Philosophise Botanicae,' 

 published six-and-twenty years before, now expanded itself into 

 'Elementa Philosophise Botaniese,' Berolini, 1824, 8vo, of which a 

 second edition was published in two vols. 8vo, Latin and German, 

 in 1837. These were followed by a series of illustrative plates under 

 the titles of ' Icones Anatomico-Botanicse ad illustranda Elementa 

 Philosophiae Botanicae Editionis 2nd8e,' fasc. 1-3, Berolini, 1837-8, 

 fol. ; ' Icones Selectse Anatomico-Botanicae,' fasc. 1-4, Berolini, 

 1839-42, fol.; and ' Anatomia Plantarum Iconibus illustrata,' fasc. 

 1-2, Berolini, 1843-5, 4to. Of the Garden itself he commenced 

 an extensive catalogue, ' Hortus Regius Berolinensis descriptus,' of 

 which only two volumes, published in 1827 and 1833, containing the 

 Ferns, Grasses and Carices, were published ; and he also gave bis 

 assistance to Otto in the publication of his ' Abbildungen auserlesener 

 Gewachse des Kdniglichen Botanischen Gartens zu Berlin.' Besides 

 these works, he contributed largely to the memoirs of the Berlin 

 Academy, to the ' Magazin der Gesellschaft Naturforschender 

 Freunde,' (in which he gave some remarkable papers on the struc- 

 ture and arrangement of the lower Fungi,) to the ' Jahrbucher der 

 Gewachskunde ' of Sprengel and Schrader ; and to the ' Linnaea/ to 

 which for some years he supplied an Annual Report on the progress 

 of Physiological Botany. Among his other contributions to Science 

 and Philosophy, and as demonstrative of the great range of his 

 acquirements, the following cannot be omitted even in this brief 

 sketch of his long and active career : viz. ' Die Urwelt und das Alter- 

 thum erlautert durch die Naturkunde,' Berlin, vol. i. 1821, vol. ii. 

 1822, of which a second edition appeared in 1834 ; ' Handbuch der 

 Phj'sikalischen Erdbeschreibung,' Berlin, 8vo, vol. i. 1826, vol. ii. 

 1830; ' Propylaeen der Naturkunde,' Berlin, part 1, 1836, part 2, 

 1839 ; and lastly, as a remarkable instance of the vigour of his 

 intellect at the advanced age of eighty- four, ' Die Philosophic der 

 gesunden Vernunft,' Berlin, 1850, 8vo. During his annual vaca- 

 tions at the University, he made for many years a series of journeys 

 in various parts of Europe, the scientific results of some of which 

 are to be found among his numerous scattered publications. Thus in 

 1823 he visited Sweden ; in 1830 and again in 1840 England ; in 1831 

 the Tyrol; in 1833 and 1838 Greece; in 1836 Istria ; Italy on 

 several occasions, being present at the meeting of Italian Naturalists 

 at Pisa in 1842, at Naples in 1843, at Milan in 1844, and at 

 Venice in 1847 ; in 1847 he also visited Corsica, and in 1848 Bel- 

 gium. After the close of the meeting of German Naturalists at 

 Regensburg, in 1849, he travelled through a great part of Southern 



