i: B-ONERAUN Y..-289 
in Saururus, Mimofa, Petiveria, Papaver, Se- 
dum rubrum, and Lilium martagon. 
In feveral Plants there is found a Confor- 
fion of the Fibres, which anfwers the End 
of an Hygrometer *. Thus in Avena, there 
is an Arifta or Beard that is twifted like a 
Rope; in fome Geraniums, the Arillus of 
the Seed has a fpiral Tail; and in Muium, 
the Peduncles are twifted contrary ways 
above and below. 
C HLA. Poe: 
Of GEMMATION. 
C EMMATION is the Conftruction 
JV of the Gem or Bud, which is formed 
either of Leaves, Stipule, Petioles or Squame. 
Thofe that are formed of Leaves will be 
confidered in the next Chapter, under the 
Head of Foliation ; the reft are diftinguifh- 
able into, 
* An Inftrument for meafuring the Degree of Dry- 
nefs or Moiiture of the Air. The Fibres of the Plants 
here inftanced being affected by the Quality of the Air, 
the fpiral Part twifts or untwitts as the Weather varies 5 
and by obferving this, the Temperature of the Air may 
be difcovered, 
PE- 
