£14 INDEX.* 
mon afymptote infinitely extended beyond the ordi- 
nate, are equal, p. 287. . 
Problems , phyfical. To determine the degree of fplen- 
dor or opacity of a folar fpot, p. 27. 
To determine the direction of the eledlric matter in the 
difcharge of the Leyden phial, p. 397. 
The fundamental interval of a thermometer’s fcale being 
given for a given height of the barometer, to find the 
fundamental interval for any other given height of the 
barometer, p. 222. 
Problems , mixt. The folar fpots being fuppofed to be 
excavations in the luminous matter of the Sun, to find 
their depth by obfervation, p. 10. 
To determine the t-rue difference of meridians from ob- 
fervations of immerfions and emerfions of Jupiter’s 
fatellites, p. 187. 
To find the length of the fubtangent of the atmofpherical 
logarithmic, p. 233. 
To find the length of the fubtangent of the atmofpherical 
curve in ioooths of a Paris toife, the mean tempera- 
ture of the air being given in degrees of Bird’s Fah- 
renheit, p. 256. 
To determine the temperature in which the length of the 
fubtangent of the atmofpherical curve is expreffed in 
ioooths of an Englifh fathom by the fubtangent of 
the Briggian fyftem, p.257. 
To find the equation for every degree of Bird’s Fahren- 
heit, in the mean temperature of the air, above or 
below 39,74, p. 258. 
To compare the deniities of the air, at any given eleva- 
tion above the furface of the earth, in different tempe- 
ratures, p. 261. 
The height of the quickfilver in the Torricellian tube, 
and the temperature of the air being given, at a 
given elevation above the level of the fea, to compare 
the denfity of the air with that of the quickfilver at the 
time and place of obfervation, p. 263. 
To 
