222 ESSAYS ann OBSERVATIONS 
duft does not enter even the cavity of the fruit; 
as may be feen by opening the heads of the pa- 
paver orientale hirfutifimum flore magno, T..Cor. 
p- 17. when the flower is fully blown. _ For, 
tho’ the upper part of the heads, are then co- 
vered with the purple duft of the apices; yet 
the feeds, partitions to which they adhere, 
and all within the fruit, continue perfectly 
white. I might add, that the duft of the a- 
pices is fometimes in fo large grains, as to be 
vifible to the naked eye, asin fome of the mal- 
vaceae; while no conduits are difcoverable, by 
magnifying glafles, in the /lylus, whofe dia- 
meter does not much exceed that of the 
grains of the duft, which refembling prickly 
balls, muft be very unfit to enter a ftrait paf- 
fage. And, 
3tio, THAT the volatile {pirit, or vapour 
of the duft, may be conveyed to the feed, 
‘n this manner; it may enter the air veffels 
of the iylus, pafs through them into the 
placenta, thence into the fwnes umbilicales, 
and fo into the ova or feeds, along with the 
nutritive juices. But I cannot omit a remark- 
able paflage in this difcourfe, as it anfwers 
an affertion of Mr Geoffrey, and on other 
accounts which take in the tranflator’s words. 
« Tubae 
s 
+ 
d 
