50 HABITUDES OE THE FUNGI. 



find mushrooms in every climate. A very large propor- 

 tion of them is met with only towards the end of summer 

 and in autumn. Heavy rains, and unseasonably early 

 heat, may force them in May or June; but they are then 

 never so perfect. Thunder-storms with rain, develop them 

 prodigiously." 



Of one hundred and five species of fungi treated of by 

 M. Roques, only one grows at all seasons; four in spring; 

 one in spring and autumn ; five at the very end of sum- 

 mer; eight exclusively in summer; twenty-eight in sum- 

 mer and autumn; and sixty-two exclusively in autumn. 

 Of the one hundred and five, therefore, ninety-two are 

 active in autumn, and thirty-six in summer. 



Were this essay not necessarily very long, it would not 

 be uninteresting to inquire, in how marked a degree the 

 proportion of diseases to seasons, corresponds with that of 

 the above table: but most of you know already that the 

 relation is remarkable enough, since the growth of the 

 fungi and of malarious fevers is generally in the order di- 

 rectly of autumn summer spring winter. 



