[ 48o ] 
Portuguese , called upon to meafure two degrees of longitude near the Fort of Macapa, 
m*. 
p. 224. 
Potatoes, power of extrafling air from water, p. 121. 
Preftnti made to the Royal Society, p. 45$. 
Qt 
^uickfilver, the bed furfaee for trying the magnetifm of bodies, p. 8. Method of 
cleaning the furfaee of, p. 9. 
R. 
Pain, Regider of, at Lyndon, at Rutland, South Lambeth in Surrey, and Selbourn 
-and Fyfield, Hampfhire, in 1786, p. 368. 
Pam/den , on his indrument for trigonometical operations, p. 22 o. 
RefraHion , tables of, lliould be made from the fame indrument, by turning it to the 
North and to the South alternately, p. 180. Invedigation of a method of allowing 
for refraflion in aftronomical obfervations, p. 318. Invedigation of the effects of, p. 
334 - 
Rovato , Jofrpb da , Account of the Places where, and the Manner in which, Borax 
is produced, Italian, p.301. Englidi, p.471. 
Roy , William , an Account of the mode propofed to be followed in .determining the 
relative Situation of the Royal Obfervatories of Greenwich and Paris, p. 188. Sup- 
plement to the account, p. 465. 
Rumo'vjkl, M. Obfervation of the Tranfit of Mercury, May 4, 1786, p. 47. 
Rujfm, Emprefs, called upon to meafure two degrees of longitude in high Northern 
latitudes, p. 22 
I 
S. 
Satellites , account of two revolving round the Georgian planet, p. 12$. 
Saturn , determination of the heliocentric longitude of the defeending node, p. 3 7. 
Scbooten , improvements in algebra by him, p, 81. 
Sen/e , organs of, in Whales, p. 425. 
Sight, -organ of, in Whales, p.437. 
Silk, raw, power of attra&ing and feparating air from water, p. 84. 100. 108. no. 
Smeaton, John, an Obfervation of the right Afcenfion and Declination of Mercury out 
of the Meridian, near his greatell Elongation, Sept. 1786, p. 31$. 
Smelling, Senfe of, in Whalco, p. 428. 
Spermaceti , on the fituation of, in Whales, p. 390. 
Spleen of Whales, p. 412. 
Stanhope , Charles Earl, Remarks on Mr. Brydone’s Account of a remarkable Thunder- 
iform in Scotland, p. 130. 
1 Stomachf 
I 
