I 
ON THE CONVEYANCE OF PLANTS AND SEEDS ON 
SHIP-BOARD. 
Numerous have been the methods employed 
in the conveyance of plants to and from distant 
countries. It is quite unnecessary, however, 
to enter into any lengthened details of these 
attempts, as they resolve themselves into two 
kinds; the one, by which the plants are meant to 
be kept in a passive condition, and the other, 
by which means are employed to keep them 
growing during the voyage. 
