'276 Mr. J. Hogg and Sig. Tenore on the comparative Influence 



tanical Geography of the Kingdom of Naples *," by JSignor 

 Tenore ; and the remainder consists of some comparative re- 

 marks on the vegetation of England, principally compiled 

 from the " Naturalist's Calendar," published in White's works 

 on natural history. My own observations are inclosed within 

 brackets. I remain, Gentlemen, yours, &c. 



London, Jan. 22, 1834. J. HoGG. 



The great Linnaeus, in different passages of his celebrated 

 works, has not ceased from recommending botanists to keep 

 an account of their observations on the influence which the 

 difference of climates and seasons exercises upon the periods 

 of vegetation. By adding, according to his custom, the ex- 

 ample to the precept, in his PhilosopJiia Botcmica, under the 

 title of" The Calendar of Flora," he has there given a series 

 of researches instituted by himself on the vegetation of the 

 vicinity of the city of Upsal, from whose celebrated University 

 he dictated the rules that are essential in paying due attention 

 to the study of nature. 



Convinced of the utility of these inquiries, and taking for 

 a model the work of Linnaeus, and that of a similar kind com- 

 piled by M. Chavassieux d'Audibert on the vegetation of the 

 neighbourhood of Paris, I have in different years applied 

 myself in observing the times of vegetation in the environs of 

 Naples, and 1 have not failed to keep an account of my own 

 observations, and to compare them with those of the above- 

 mentioned authors. 



I should have wished to extend this sketch to all the pro- 

 vinces of the kingdom of Naples ; but as it is not possible 

 that such researches can be carried on except by those who 

 reside there permanently, so I could not change this plan 

 until after some correspondents had been sent to live in the 

 provinces who were charged to collect materials for the Flora 

 Napolitana, and to send the plants to the Royal Garden at 

 Naples. Observations on the periods of vegetation recom- 

 mended to them in the instructions which were compiled for 

 such purpose, and of which not a few important remarks made 

 in all parts of the kingdom are about to be published in the 

 Giomale Encidopedico di Napoli, already begin to benefit 

 the public by this useful undertaking ; and indeed, unless by the 

 postponement of that botanical correspondence, the compila- 

 tion of this short work had better for the present been delayed. 



In the mean time, flattering myself that the original part 



• Cenno sulfa Gengrajia Fisica e Iiotanica del Regno di Napoli, di Michele 

 Tenore; enn due Qafte Geo /, <gieAe. Napoli I827i A very interesting work, 

 deserving to be wholly translated into English. 



