210 THROUGH GLADE AND MEAD. 
of my lively gratitude, and also to contribute in that 
country to the extension and progress of agriculture, 
and more especially of sylviculture in the United States, 
I give and bequeath to the American Philosophical So- 
ciety of Philadelphia, of which I have the honor to be 
a member, the sum of twelve thousand dollars. I give 
and bequeath to the Society of Agriculture and Arts, 
in the State of Massachusetts, of which I have the 
honor to be a member, the sum of eight thousand dol- 
lars.” The bequest to the Massachusetts Society for 
the Promotion of Agriculture is applied to aid the bo- 
tanical garden at Harvard and the Arnold Arboretum, 
and to the publication of pamphlets on forest culture. 
Leaving’ out the cryptogams of lower rank than 
the ferns, we find that Michaux’s Flora contains 1,530 
species, about half the number now described in Gray’s 
“Manual of the Botany of the Northern United States.” 
Eleven years after the publication of Michaux’s work, 
the second Flora of North America, by Frederick Pursh, 
appeared. This was not confined, like the former, to 
the author’s own collections, but aimed at completeness, 
and described 3,076 species. 
The third Flora, started by Torrey and Gray more 
than fifty years ago, is still unfinished. The activity of 
botanical exploration has been so great during this in- 
terval, so many new genera and species have been dis- 
covered, that we can easily form some just idea of the 
