424 Scientific Intelligence. 
tus seeds, of which a pound weight suffices to raise many thousand 
trees, might be a source of lucrative and extensive employment; 
but on this I wish to dwell, that in Australian vegetation we prob- 
ably possess the means of obliterating the rainless zones of the 
globe, to spread at last woods over our deserts, and thereby to mit- 
igate the distressing drought, and to annihilate, perhaps, even that 
occasionally excessive dry heat evolved by the sun’s rays from the 
aked ground throughout extensive regions of the interior, and 
wafted with the current of air to the east and south, miseries from 
An experiment, instituted on a bare ridge near our metropolis, de- 
monstrates what may be done.” 
this essay; from which it appears, that in Australia, no less than 
Tre y LA. HAM, 
J. G. Knapp, and H. Crocker, Commissioners [appointed by the 
- : in, 18 ay 
. 
the above ao), brought home to our attention in this essay» 
; be widely read and seriously considered. i 
essay has reached our hands too late for the preparation of an 
oi apt and for specially ee, many interesting 
7. uses . ici ni Batavi edidit F. A. G. Mr 
quer. Tom. LI], fase. 4, 1863-1867, fol—Since our announce 
