of fever al Species rf Pollen, 67 



By a fmall addition of frcfh brandy fomc t'e\v arc excited a Iccond 

 time, but with fainter movements, Prcfently the liquid begins to 

 be obfcuied, and in a few minutes the grains are molllv difperfed 

 and decompofed, and the fpirit, exhaling, leaves a fort of extract 

 on the glafs mixed with very minute imdifTolvcd particles; ainong 

 which fometimes appear a few unbroken grains, much changed, and 

 now refembling an empty bladder lying flat. 



1, E'ica carnca. Anthers capfular, bearing the pollen on th'cir 

 inner furface, and difcharging it by a brilk explofion from an aper- 

 ture on the fide next the piflil. If the figma be touched with a pin 

 at a certain period of the inflorefccnce, it happens conimonly that all 

 the anthers proje6l their pollen at once ; and it may thus be collcdcd 

 on paper. The proper time for this is when the Jligma is elevated 

 a little from between the anthers. In fize and flructure this pol- 

 len nearly rcfembles the preceding, and is, in like manner, capable of 

 imbibing water and difpcrfing with a rapid motion in fpirit. 



3. Refcda odorata. Mignonette. 



Unripe pollen, fmooth, egg-oblong, tranfparent, without fepta ? 

 In water it expands to a fphere, and is a6led upon by fpirit as the 

 preceding. 



4. Ciclusfiagellifonnis, Creeping Cereus. 



Anthers oblong, crumbling. Pollen of a large fize, compared witli 

 any others I have feen j in fhape refembling a plump grain of wheat, 

 white and diaphanous. It expands in water to a ibape nearly fphe- 

 rical. The contact of fpirit brings on a pearly opacity. The grains 

 imbibe it flowly, and during expanfion revolve on their axes witk a 

 .pretty regular motion, exhibiting a fpedtacle no lefs novel than de- 

 lightful. In the mean time, fome minute particles are feen to be 

 eje(5ted, and, the motion ceafing, the tranfparency returns, proceedLng 

 from the furface to the centre. 



K 2 If 



