8 THE EDITOR'S PREFACE. 



writers, so as to appear with the uniformity of one author, required 

 at first a considerable degree of attention ; but the composition grew 

 easy in proportion as the subject became famihar. To the following 

 Authors I stand particularly indebted : Sir Charles Linnaeus, the 

 Rev. Dr. Stephen Hales, the Rev. Mr. Hart, Mr. Bradley, the Rev. Mr. 

 Hanbury, Mr. P. Millar, Mons. Duhamel, INIons. Buffon, the Abbe 

 Shabol, and Professor Kalm ; and I make this public acknowledgment 

 to avoid the charge of plagiarism. The Philosophical Transactions of 

 London^ have, in many instances, been of singular service to me ; and I 

 have had frequent occasion to introduce extracts from my own Georgical 

 Essays. I also acknowledge to have received much assistance from 

 James Farquharson, Esq. whose excellent Memoir upon the Cultivation 

 of the Scotch Pine is inserted in the twenty-second chapter of the first 

 book, 



Mr. Speechly, gardener to his Grace the Duke of Portland, by his 

 Grace's orders, transmitted to me the account published in the first 

 volume, describing the method of planting upon his Grace's estates in 

 Nottinghamshire ; and I have great satisfaction in being authorised to 

 say, that this most excellent Planter has his Grace's permission to direct 

 gentlemen in the manner of forming plantationsr — -for which he is well 

 qualified in all the varieties of soil and situation. From the same judi- 

 cious person I am favoured with the Note inserted at the end of the third, 

 chapter of the third book, describing a method of raising the pine apple. 

 without the use of tanner's bark.. 



I wish to be known to have received favours from Joseph Banks, Esq. 

 whose desire after natural knowledge is not confined within the limits of 

 the habitable world. * 



* Vide A Voyage towards the North Pole, undertaken by the Hon, Capt. Phipps, in th^ 

 year 1773. Introduction, p. 12. 



