324 On Plica Polonica. 
pulverized, for the reception of a crop of grain or 
pulfe, is explained by the preceding facts and 
obfervations: For when the turf of a field is 
reduced to a fine powder, the air finds free accefs 
to every part of it; and the feeds it contains, being 
placed in a temperature that is nearly uniform, and 
fupplied with a neceffary portion of humidity from 
the moift ground, are expofed in the moft favourable 
manner, to the united effects of thofe caufes, which 
are intended by nature to promote the growth and 
profperity of the infant plant. 
On Prica Potonrca. By Mr. Freperte Horrman, 
Surgeon to the Pruffian Army. Pree his ‘i Dr. 
FERRIAR. 
READ, MARCH 22, 1793. 
Sywonyms. Lues Pocufienfis: * Trice : Trichoma, Pou, 
Koldun or Gozdz, German, Fuden- z0pff ¢ wichte sears 
wixel-zorff: weichel-zorff. 
ISEASES, the tendency of which is fatal, and 
the occurrence frequent, peculiarly claim the 
attention of the practical phyfician; while morbid affec- 
tions which appear more rarely, and prefent unufual 
phenomena, more efpecially attract the enquiries ‘a 
thofe 
* Pokufiais a territory of Polayd, 
