510 Additional Notes. 



■whicli it contains is by no means free from objections, the 

 author is entitled to much commendation for his labour, and 

 must ever be ranked among those who have made large con- 

 tributions to our knowledge of the vegetable kingdom. 



The modern discoveries in chemistry have contributed 

 much to enlarge our acquaintance with the composition, food, 

 and growth of plants. Several of the vegetable physiologists 

 mentioned in the foregoing paragraphs have rendered im- 

 portant aid to this branch of inquiry. To these may be ad- 

 ded Priestley, of Great-Britain ; Hassenfratz, Four- 

 CROY, Chaptal, Giobert, and Parmentter, of France; 

 andlNGENHouz and Von Humboldt, of Germany ; whose 

 experiments and various works have thrown new and very 

 important light on some of the laws of vegetation. 



Additional Systems of Botany, p. 139. 



Botanical methods, either partly or wholly original, have 

 been proposed by Heister, Necker, and Medicus, all of 

 Germany ; but the author has too little knowledge of them 

 to attempt an account of their structure or merits. Modifica- 

 tions and improvements of the Linnaean system have also been 

 proposed by the celebrated Schreber, of that country. But 

 with the peculiar character of these too the author is unac- 

 quainted. 



Writers on particular Classes, or Families of Plants, p. 139. 



Perliaps no class of plants has been investigated since the 

 time of LiNN^us with greater zeal and labour than the Cryp- 

 iogamia. Besides the writers on this department of botany, 

 enumerated in the above-mendoned page, the names of M. 

 Tode, M. Bulliard, Professor Batsch, M. de Beau- 

 voTS, and several others, may be added to the list. Indeed, 

 the plants of this class have been investigated with a species of 

 zeal, which led a late botanist, M. de Necker, to denominate 

 the enthusiastic rage for inquiries after them Cryptomania. 

 But to no botanist are we so much indebted for important in- 

 formation respecting the Cryptogamick plants as to the late 

 Dr. Hedwig, of.Leipsic. — Barton's Elemejits. 



One of the latest and best writers on the Lichens is Erik 

 AcHARius, M.D. a native of Sweden. — See his Lichenograr 

 phice Siieciis Prodromus, 8vo. I*T'98. 



