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Section I. Defcription of the apparatus made ufe of in the meafurement of the bafe 
of verification in Romney Marfh, with the hundred-feet fletl chain, and the refulr of 
that operation, p. 121. General table of the meafurement of the bafe of verifica- 
tion in Romney Marfh, p. 134. Section II. General deferip ion of the great inllru- 
ment with which the angles, in the recent trigonometrical operation, were obferved ; 
Ihewi r.g alio its various adjullments for practice, p. 133. Seiftioa III. Defcription of 
other articles of machinery made ufe of in the trigonometrical operation ; alfo, the 
diftindtion of the Nations into two fets, p. 160. Sedion IV. Calculation of the 
feries of triangles extending fiom YVindfor to Dunkirk, whereby the geodctieal diftance 
between the meridians of the Royal Obfervatorie: of Greenwich and Paris is deter- 
mined, p. 168. Sedion V. On the difference between horizontal angles on a fphere 
and fpheroid, p. 192. Sedion VI. Manner ot determining the latitudes of the Ac- 
tions. Application of the pole-ftar oblervations to computations on different fphercs, 
and alfo M. Bouguer’s fpheroid, for the determination of the differences of longitude. 
Ultimate tefult of the trigonometrical operation, whereby the difference ot the Royal 
Obfervatories of Greenwich and Paris is determined, p.200. Sedion VII. Account 
of the obfervations made during the ccurfe of the trigonometrical operation for the 
determination of terreltrial refradion, p. 233. Sedrion VIII. Secondary triangles, 
fubdivided into two fets, for the improvement of the maps ot the country, and the 
plan of the City of London and its environs, p. 247. 
Orange trees, deftroyed by fugar ants in the Weft Indies, p. 347. 
P. 
Padlcfwortb , its latitude, longitude, &c. p. 232. 
Paris , its longitude eaft from Greenwich determined, p. 221. Its latitude, p- 22^. 
Parting metals, account of a new compound acid menftruum, ufetui in fome technical 
operations in, p. 367. 
Petit Havre, a bay five or fix miles from the town of St. George, in the ifland of Gre- 
nada, p. 346. 
Pigott , Edward, on luminous arches, p. 47. On the longitudes and latitudes of fome 
remarkable places near the Severn, p. 385. 
Plumbago , Sydney Cove mineral fuppofed to be a pure fpecies of, p. 319. 
Porlock , or Hufton Point, its longitude weft of Greenwich determined, p. 390. Its 
latitude determined, ib. 
Precipitate , red, mixed with iron filings, produces very pure fixed air, p. 71* Eraf* 
dull, mixed with red precipitate yields fixed air, ib. 
Priejiley , Dr. on refpiration, p. 106. 
Problem , folution of an important one, p. 193. 
Propofitions relating to fpherical motion, pp. 497, 500, 501, 504, 512, £19, $3°* 
Pure air. See Air . 
Putrefattion , conclufions refpedlng it in the lean of animal fubftances, p* 422. 
4 Qi 
