yh a ae oe ecient 
Calendar of Vegetation, §. by C. 8. Rafinesque. 77 
Professor Bigelow infers, «that the difference of season 
between the northern and southern extremities of the country 
is not less than two months and a half? «Difference of 
longitude does not seem very materially to affect the Floral 
Calendar within the United States.” It appears, that in the 
same year peach-trees were in blossom at Valencia, in Spain, 
abont the 19th of March; the apple-tree near London, May 
8th; the cherry-tree and pear-tree at Geneva, in Switzerland, 
April 3d. 
We hope that this research will be prosecuted in the man- 
nerit has thus been happily begun. It evidently affords an 
excellent criterion of the actual temperature, on a scale more 
extensive than it is practicable to obtain from thermometrical 
registers. 
Floral Calendars, kept in various parts of the United States, 
would afford very interesting information, as to the changes of 
climate in particular places; a common topic of popular re- 
mark, but generally with few and inaccurate data. 
ee RR ce 
7 
Arr. XVI. 4 Journal of the Progress of Vegetation near 
Philadelphia, between the 20th of February and the 20th 
of May, 1816, with occasional Zoological Remarks. By 
C.S. Rarivesqur. | 
Ti importance of observations on the annual progress of 
Yegetation is obvious, and, as connected with agriculture, gar- 
ening, &c., eminently useful. Comparative observations 
“quire a particular degree of interest, when made by skilful 
observers, at the same time, but at different places. Dr. 
Bigelow, of Boston, issued a circular, proposing that such con- 
emporaneous observations should be made in the spring of 
1817; and I wish that his request may have been attended to, 
When the collection of those observations may afford valuable 
‘8 for an American calendar of flora. The blossoming 
