1 



INDKX. 



of oxygrn, iv, 1:2; of Kuiirk. I, i, 

 i07 ; calori/ed, I K); 



. t.i'jl.-, i!>. 

 Phi/ait- hislor/ of \\stemntir, i, 214 



ri :!, i, i :fy to, ii, 435; 



cold on Ihr summit of, i\ 

 Picture writing, historic account of, 



vi, 342 

 Pictures, discovery pf ancient, ii, 231, 



244 



fit/eon, description of the, v, f>2 ") 

 Pil.itr, mount, in Switzerland, ii, 417 

 Pimento tree, deseript ion of, v, 1 .- 

 Pitch lake, a remarkable, iii, 1 '>() 



pine, description of the, v, 173 



Planetary nebula;, on the, i, 97 

 P lands, conjectures on the, i, 36 ; ele- 

 ments of the, 146; inequalities of 

 the, 140; telescopic, l6l ; general 

 observations on the, 192; on the re- 

 lations of the, 207 



Plantain tree, description of the, v, 52 



Plants, oxygen ^:t> emitted from, iv, 



22; spontaneous movement of, v, 2 ; 



classification of, 5 ; natural history 



of, 19 ; nutritive, 42 ; medicinal, 34; 



useful, 282 ; metallic, vi, 326 



Plata, La, of the mines of, ii, 292 ; 



course of the river, iii, 48 

 Plating, the art of, vi, 307 

 Pliny the elder, death of, i, 339 



account of the remora, v, 508 



Plumbago, properties of, ii, 324 

 Plutonic theory of the earth, i, 232 

 Plymouth, waters agitated at, ii, 54 

 Plynlimmon, in Wales, described, ii,444 

 Po, description of the river, iii, 32, 77 

 Poisons, account of vegetable, v, 221 

 Poland, salt mines in, ii, 274, 367 

 Polar effusions, the tides attributed to, 



iii, 335 



Polarity of magnets, on the, iv, 364 

 J ole, voyages towards the north, iv, 



100, 1 1 1 



Pulyylitt bible, the first, vi, 404; his- 

 tory of the Knglisb, 407 

 Polypes, description of, v, 352 

 J'omjieii, (icstriH lion of, i, 335; disco- 



\i r\ . Hie ruins of, ii, .218 

 .Tout .\i nf, at Paris, described, iii, 30 

 1 (j)tte Liifio, ruins of, iii, 70 



itolf, Derbyshire, described, ii, 83 

 Porphyry, singular species of, i, 4b8 



t'ortiii, Mihl< Train-on:, town at, i 

 /'</ litiii.-t!, Jain I, ii, (> 



t'ortti) itatiooo i r.> at,ii, 17 



!' itnyui, minerals of, . . 



niii*, hi.s measurement of the 

 :h, i, 1 1 



I'ni iHftttt, oumpoMtion of, vi, 289 

 Potusi, account of lli. nun. s (.:', u, '(> I 



, course of the river, iii, l;> 

 .t, composition of fulminating, 



\i, 18-1 

 PoH-rrscourt, in Ireland, cascade at 



iii, 



Preadnmites, system of tip 

 Prefers, on the baths of, iii, Mi I 

 Presters, or waterspouts, account of, 



iv, 2.56 

 Price, an excellent painter on glass, 



vi, 414 



Priestley, Dr., discoveries of, iv, 6 

 Prime numbers, on finding, i, 2o.i 

 Primitive formations of rocks, i, 322 

 Printing, history of, vi, 39S ; cVi.M.l 



from China, 399; progress of in 



England, 405 



Protnontories, remarkable, i, 273 

 Psalter of Mentz, account of, vi, 401 

 Prussian blue, origin of, iii, 194 

 Ptolemy Pkiladelphus, institutions of, 



i,9 

 . the astronomer, account of, i, 



14,302 



Pudding stone described, ii, 30G 

 Pnmice, various kinds of, i, /-!" 



stones, remarkable, i, 4(~.; 



shoal of, iv, 165 



Putala, in Thibet, account of, ii ? 



Pyramidal appearance of the heavci:*, 

 'iv, 522 



Pyrenees, description of the, ii, 419 



Pyrites, observations on, i, 



Pi/rmont waters, (juality of the, iii, 167 



Pi/rotcchnii, principles of, vi, 21 i 



P',/!ft : -;oras, doctrines of, i, 7 



Qninli-ttnts, on the application of tele- 

 scopes to, i, 33 



Quadrupeds, on unknown, ii, IT 

 New Holland, ^Oo; general tit 

 tiou of, v, 647 



Qiuigga, natural history of thr r \ , 



Q.\nu ries, subterraneous, at Paris, ii, 1 1 > 



Quicksilver used 1.1 extracting .lilicr, 

 ii, 298 ; description of the min 

 329 i affecting scene iu the, 



