186 M. Berghaus <m the Epochs of Vegetation. 



In the New World, In the Old World. 



Perth- Amboy (Jersey), Naples, Tubingen, 



Lat. 40° 20' 40° 51' 84° 31' 



The Peach tree blossoms the 21st April, the 8th February, the 6th April. 

 The Pear-tree, . . . 27th April, 8th March, 4th May. 



The Apple-tree, . . . 2d May, 8th March, 8th May. 



Between Perth-Amboy, on the east coast of North America, 

 and Naples, there is therefore a difference in the flowering 

 period of the peach-tree of ten weeks, although the two places 

 are nearly under the same parallel ; and there is a difference 

 of six weeks in the case of the pear-tree, and eight in the 

 apple. Perth-Amboy, however, lies on the isothermal pa- 

 rallel of 12^°, while Naples is nearly on that of 17°. At the 

 former place, the winter has a temperature of only 32°.54 F., 

 and at the latter of 50° F. The mean temperature of April 

 at New York (Lat. 40° 40) is 49°.l F., and at Tubingen 48°.2 F. 

 Amygdalus persica therefore requires for the development of 

 its blossoms at least 48° .2 F., and Naples has that tempera- 

 ture in the month of February. 



The third epoch of vegetation, the ripening of the fruit, or 

 fructification, is subjected to the same variations as the pre- 

 ceding epochs, both as regards the influence of the thermal 

 nature of the season for one and the same place, and the dif- 

 ference of climate in different latitudes. 



The wheat harvest begins in the neighbourhood of Naples 

 in June, in Central Germany in July, in the south of Eng- 

 land and in the middle districts of Sweden on the 4th Au- 

 gust. 



The barley-harvest takes place at Naples in June, in Cen- 

 tral Germany about the end of July or beginning of August, 

 in England on the 14th August, and in the middle districts of 

 Sweden on the 4th August. 



Ripe cherries are to be had in Naples in the first days of 

 May, in Paris towards the end of June, in Central Germany 

 about the end of June, and in the south.of England not till 

 the 22d July. 



Owing to the comparatively higher temperature which pre- 

 vails in summer in Sweden, and to the more rapid vegetation 

 there than in England, the wheat harvest does not take place 

 sooner in the south of England than at Upsala, but occurs 



