of the Climate of Naples upon the Periods of Vegetation. 107 



be able to reckon that the same plants flower in Naples two 

 months and a half (or ten weeks) earlier than at Upsal, and 

 a month (or four weeks) earlier than at Paris. 



The considerations before explained respecting the in- 

 fluence of the difference of the seasons in accelerating or in 

 retarding the periods of vegetation, ought in every way to be 

 applied to the time of flowering. In like manner, as in the 

 period of leafing, we may, however, observe that the efflo- 

 rescence of plants varies from 1 5 to 20 days, according to the 

 changes in the temperature of the different years. 



[Now, before we estimate the times of blowing at Naples 

 with those of the same plants in England, it will be necessary 

 first to reduce each of the dates before given to a more cer- 

 tain medium day between an early and a late year, by taking 

 18 days as the mean varying time, which, for the purpose of 

 showing the variations in the different Neapolitan seasons, and 

 of being compared with those in the English seasons given in 

 the catalogue at page 105, I have computed in the following 

 manner : 



Flowering. 



Amygdalus persica . . 

 Borago officinalis . . . 

 Calendula officinalis 

 Daphne Laureola . . 



Draba verna 



Fragaria vesca 



Galanthus nivalis . . . 

 Glechoma hederacea 

 Lamium purpureum 

 Prunus armeniaca.. . 



Prunus Cerasus 



Puhnonaria officinalis 

 Pyrus communis .... 



Pyrus Malus 



Ranunculus Ficaria 



Sambucus nigra 



Thlaspi B ursa-pastoris 

 Tussilago Farfara . . 

 Valantia cruciata . . . 

 Veronica 

 Vinca minor . . 



Viola canina 



Viola odorata 



Feb. 

 Mar. 

 Jan. 

 Jan. 

 Feb. 

 Feb. 

 Jan. 

 Mar. 

 Jan. 

 Feb. 

 Feb. 

 Feb. 

 Mar. 

 Mar. 

 Jan. 

 Mar. 

 Jan. 

 Jan. 

 Mar. 

 hederaefolia Jan. 

 Jan* 

 Mar. 

 Feb. 



As before 

 at Naples. 



1—15 



, 1—15 



16-31 



1—15 



1—15 



16-28 



1—15 



1—15 



16—31 



1—15 



1—15 



1—15 



1—15 



1—15 



16—31 



16—31 



1-15 



16-31 



1—15 



16-31 



16—31 



16—31 



1—15 



18 days earlier. 



Jan. 14—28 



Feb. 11— 25 



Dec. 29— Jan. 13 



Dec 14—28 



Jan- 14—28 



Jan. 30— Feb. 11 



Dec. 14—28 



Feb. 11—25 



Dec.29— Jan. 13 



Jan. 14—28 



Jan. 14—28 



Jan. 14—28 



Feb. 11—25 



Feb. 11—25 



Dec 29— Jan. 1 3 



Feb.26— Mar. 13 



Dec. 14—28 

 Dec.29— Jan. 13 



Feb. 11—25 



Dec.29— Jan. 13 



Dec. 29— Jan.13 



Feb.26— Mar.13 



Jan. 14-28 



B. 



18 days latter. 



Feb. 19— Mar. 5 

 Mar. 1 9— April2 



Feb. 3—18 

 Jan. 19— Feb. 2 

 Feb. 19— Mar. 5 



March 6—18 

 Jan. 19_Feb. 2 

 Mar. 19— April 2 



Feb. 3—18 

 Feb.l9_Mar. „ 

 Feb.l9_Mar. 5 

 Feb. 19— Mar. 5 

 Mar. 19_ April 2 

 Mar. 19_ April 2 

 Feb. 3—18 

 April 3—18 

 Jan. 19— Feb. 2 



Feb. 3—18 

 Mar. 19— April 2 

 Feb. 3—18 

 Feb. 3—I8 

 April 3—I8 

 Feb. 19— Mar. 5 



Jan. 21— Feb.26 

 Feb. 18— Mar.26 

 Jan. 5— Feb. 10 



Mean of 

 A and B. 



Dec. 21 — Jan. 2 6 Jan. 



5 J 



Jan. 21— Feb.26 

 Feb. 5— Mar. 12 

 Dec.21— Jan.26 

 Feb. 18— Mar.26 

 Jan. 5— Feb. 10 

 an. 21— Feb.26 

 Jan. 21— Feb.26 

 Jan. 21— Feb.26 

 Feb. 18— Mar.26 

 Feb. 18— Mar.26 

 Jan. 5 — Feb. 10 Jan. 

 Mar. 5— Apr. 10 Mar 

 Dec. 21— Jan. 26 Jan. 

 Jan. 5 — Feb. 10 Jan 



True 

 Mean. 



Feb. 

 Mar 

 Jan. 



Feb. 

 Feb. 

 Jan. 

 Mar, 

 Jan. 

 Feb. 

 Feb. 

 Feb. 

 Mar 

 Mar 



Feb. 18— Mar.26 

 Jan. 5— Feb. 10 



Mar. 

 Jan. 



Jan. 5 —Feb. 10 Jan, 



Mar. 5 — Apr. 10 

 Jan.21— Feb.26 



Mar. 

 Feb 



En- 

 gland. 



Mar. 28 

 Junel4 

 June20 

 Apr. 7 

 Mar. 17 

 Apr. 1/ 

 Jan. 31 

 Apr. 1 

 Jan. 30 

 Feb. 23 

 Apr. 22 

 Apr. 2 

 Apr. 20 

 May 5 

 Mar. 7 

 June 3 

 Feb. 27 

 Mar. 11 

 June 6 

 Mar. 15 

 Mar.24 

 Mar.27 

 Mar. 10 



Therefore, from a calculation of the mean dates given in 

 the last two comparative Tables, there results this general 

 difference in the times of flowering in those countries, that is 

 to say, the efflorescence of the same species of plants occurs 



P 2 



