index. 555 



Tage. 



Organization, Observations on, - - 260 

 Principle of, - - 262 



P 



Papaw-Tree, Account of the Effects of the Juice of the, in 

 intenerating Butcher's meat, by Dr Holder, 245. 

 Well known in Barbadoes, 245. — The fruit, when 

 cooked, not deleterious, 246. — Appears to reduce 

 inflammatory symptoms, 24T. — Conclusions from 

 the Chemical Analysis, 248. — The uncooked 

 fruit has the same effect, when eaten by animals, 

 as the juice, when applied to butcher's meat, 249 



Petrifactions, Account of some Sandstone, found near Edin- 

 burgh, by the Rev. George Grierson, 1 56. — Great 

 Length and Diameter of some petrified vegeta- 

 ble Stems, 157- — Similar phaenomena observed in 

 Africa. — Inquiry into the process of Petrifaction, 

 159« — Sandstone, in some instances, a chemical 

 deposite, 162, — Importance of the study of Pe- 

 trifactions, 163. 



Pheasant-Hen, assumes the Male Plumage very early in 



confinement, - - 191 



Picus, Observations on the Genus, with descriptions of two 

 New Species, by William Swainson, Esq. 288. — 

 Picus chrysosternus, 289- — Picus Braziliensis, 

 291- 



Plants, Remains of, in Slate-clay, 89 

 descriptions of New or Rare Native, found in Scot- 

 land, by Mr David Don, 294. — Veronica seti- 

 gera, 297- — Poa stricta, 298. — Poa leptastachya, 

 299< — Chaerophyllum aromaticum, 300. — Orobus 



tenuifolius, 301. — Lychnis alpina, 302 Poten- 



tilla opaca, 304. 



