PREFACE. 



IN my notes on thofe treatifes felc(51:ed out of 

 the Ama^nitates Academicie, which i publifh- 

 ed not Ion or an^o, i marked the day of the 

 rnonth on which certain trees leafed in the year 

 I ^p^r-^ \ and likcwife mentioned fome co-incidences 

 of the coming of birds, and the flowering of 

 plants in this and other countries. The inftanccs 

 i there gave were but few, as i could then find 

 no more parallel obfervations made in other 

 countries to compare mine with. Since that 

 tixme another volume of the Amasn. Academ. is 

 come out, in v/hich is a fmall treatife entitled, 

 the Calendar of Flora. This treatife contains an 

 account of the leafing, flowering, &c. of a great 

 number of plants, as alfo of the departure and 

 return of birds. As thefe obfervations happen 

 to be made the very fame year in which mine 

 were, and as they are the firfl of the kind per- 

 haps that ever were made, i was induced to look 

 over my papers again, which i had thrown by as 

 of no tonfequence •, thinking that in thefe cir- 

 cum.fiances fome ufe ought to be m.ade of them, 

 as they might prove entertaining at leafl:, if not 

 infl:ru6live to thofe whofe genius leads them to 

 curiofuies of this kind. I am very fenfible how 

 fmall the number of fuch perfons is, but i am 

 contented to write for thofe few, nay, indeed i 

 v/rite bccaufe they are fo few, being v/illing as 

 far as lies in my power to increafe their number. 



But it may be afked perhaps by fome, even 

 after they have confidcred all that is kiid on this 

 fubje6l in the introdu'ftion to the following Swe- 

 difii Calendar, and in the piece De Vernatione 



Arbo- 



