xiv 



CONTENTS. 



SECTION IV. 



Page 



Note I. Malpighi, a native of Bologna ; flourished in the middle 

 of the l7th century. Grew, an eminent physician, his contem- 

 porary, and father of English phytology. — Note II. — History 

 of the circulation of the sap. Curious adaptation of it to 

 the circulation of the blood in animals. Hedwig, Costi, 

 Willdenow, Keith. Mr Knight's ingenious hypothesis. — 

 Scepticism of Mr Keith unconquerable. — Note III. Intro- 

 susception of food not confined to plants. Men, in certain 

 cases, receive their sustenance by that means, as well as vege- 

 tables. — Note IV. Erroneous to suppose that trees are with- 

 out the power of renewing their tap-roots, — Yule, Sang. 

 Forsyth's judicious experiments to prove the fact. — Theory by 

 Mr Knight, of the effects of gravitation on both branches and 

 roots. Probably unfounded. Du Hamel, Knight. Ingenious 

 paper by Mr Keith, to disprove the theory. — Note V. Dis- 

 quisition on pruning. Sang, Pontey, Loudon. Errors of 

 Pontey's system. Rash and dangerous, unless controlled by 

 science. — Ingenious inquiry by Loudon, into the safe, as well as 

 the injurious uses of pruning. — Idea of the best principles of the 

 art. Superior excellence of terminal priming, — Note VII. 

 Good idea of regulating arboricultural processes by fashion. — 

 Severe effect of the western gales on park wood. New remedy, 

 by balancing trees, and reversing the position of their windward 

 and leeward sides. — Note VIII. Antiquity of the prejudice of 

 preserving the same position of trees on removal. Theophrastus, 

 Cato, Columella, Palladius, Virgil, Wise, Cooke. Good sense 

 of Pliny reprobated by Evelyn, and confirmed by Miller. 

 Prejudice continued down to the present period. ~ 403-418 



SECTION V. 



Note I. Vast importance of a judicious selection of subjects. 

 Success or miscarriage always regulated accordingly. If injudi- 

 ciously selected, all advancement is retarded, until the deficient 

 properties be supplied. Various illustrations of this uniform 

 principle. 419-420 



