Some further Obfervations pn the Prefervation of Seeds 
and Plants in a vegetating State, which have occurred 
to me fince I publidied the foregoing, 
S eeds of the Rheum falmatum^ oi true Rhubarb, which 
were folded up in paper, and fent in letters by the packet 
-to leveral of our colonies ^ of North America, did not fucceed 
well: whereas thofe that were fent by the fame conveyance, 
after having been firft inclofed in flat tin boxes, or varnifhed 
iron fnuff-boxes, and then put up into letters, grew very freely, 
as did thofe put up in chip-boxes, and kept by the captains of 
private fhips in their chefts or bureaus during the voyage. 
The reafon of this defedt of the feeds fent by the packet inclofed 
in paper only, appears plainly to arife from their being preffed 
too clofe together by the many letters in the mail, and kept in 
a damp Rate for perhaps two months, or more, by which means 
they became putrid and half rotten by the time they arrived ; 
whereas thofe that were kept in clofe tin and other boxes, were 
free from the damp and putrid air, and remained in an inadtive 
Rate, perfedUy found, as was evident from their growing freely 
after they were fown. 
Had the feed-veffels, with the feeds of that valuable plant 
the Chlamydia., from New Zealand, which was brought over 
by Mr. Banks and Dr. Solander, and yields a kind of very fine 
Hemp, been put into fmall dry clofe boxes, or tin canifters, 
B 2 they 
