508 Additional Notes, 



rm?i, seu Plantce Flora Monspeliensis juxta Foliorum Or^ 

 dincin. In this work the author has attempted an arrange- 

 ment of plants from the situation or position of the leaves. It 

 is beheved that no succeeding botanist has adopted this me- 

 thod ; nor, indeed, is its character such as will probably gain 

 extensive favour. — Barton's Botany, 



Thunberg'5 Alteration of the Sexual System, p. 138. 



Professor Thunberg, of Upsal, proposed, a few years 

 ago, to aker the method of Linn.^us, by suppressing the 

 classes Gyyiandria, Monoecia^ Dioecia, and Polygamia, and 

 assigning to other classes the vegetables arranged by Ltnn.eus 

 and his followers under these denominations. Tlie Professor 

 has pursued this method in his Flora Japonica, and in his Pro- 

 dromiis Flora Capensis. It is not generally considered as an 

 improvement on the method of Linn^us, but rather as ren- 

 dering it, on the whole, still more artificial and perplexed. 

 In this alteration, however, he has been followed by Gmelin, 

 Withering, Swartz, and several other eminent botanists. 



Vegetable Physiology, p. 138, 



The light thrown on Vegetable Physiology, during the 

 period under review, forms one of its most brilliant honours. 

 Little had been done in this branch of botanical science before 

 the commencement of the eighteenth century. Grew and 

 Malpighi, indeed, of the preceding age, had instituted some 

 enli^:tened inquiries into the structure of plants; but they 

 made little progress, compared with what has since been done. 

 Early in the century under review, the Rev. Dr. Hales, of 

 Great-Britain, pursued this investigation with great acuteness 

 and diligence, and in his Vegetable Statics presented the world 

 with a mass of information which will be long read and ad- 

 mired. About the same time, Duhamel, of France, was 

 busily and successfully engaged in similar inquiries, and in 

 his Physique des Arbres, and other publications, shed much 

 new light on this part of botanical science. Duhamel 

 was followed by Charles Bonnett, of Geneva, who 

 proved one of the most distinguished vegetable physiologists 

 of the age. His Traite des Feuilles is particularly cunous 

 and valuable. 



