INDEX. 
page 
their apparent magnitudes ; with a determination of the time of 
their rotatory motions on their axes. To which is added, a 
measure of the diameter of the second satellite, and an estimate 
of the comparative size of all the four, - - 332 
Home, Everard, Esq. The Croonian Lecture. In which some 
of the morbid actions of the straight muscles and cornea of the 
eye are explained, and their treatment considered, - 1 
Horizontal refractions , observations on those which affect the ap- 
pearance of terrestrial objects, &c. 29 
Huddart, Joseph, Esq. Observations on horizontal refrac- 
tions which affect the appearance of terrestrial objects, and the 
dip, or depression of the horizon of the sea, - 29 
I 
Icela?id crystal, experiments with, - - - 378 
Impregnation , animal , experimental inquiry concerning, 159, 197 
J 
Jupiter , satellites of, observations on, - - 332 
remarkable conjunction of two, - 334 
intenseness of their light and colour, 334 
their brightness and diameter distinguished, 335 
diameter of the second by entering on the 
disc of the planet, - 335 
their brightness compared to the belts and 
disc of the planet, - 339 
time of their rotatory motion, - 348 
K 
Kent, account of a trigonometrical survey carried on therein, 507 
L 
Lacerta, on the stars in, - - - - 316 
Lacker, its effect in forming rings of colours, - - 364 
Lambre , M. de. Demonstration of his formula for reducing a dis- 
tance on the sphere to any great circle near it, or the contrary, 450 
Latitude , on finding it by two heights of the sun, and the time 
elapsed between the observations, - 44 
calculations relative to the above method, - 113 
Lavoisier, M. Remarks on his opinion respecting the force of 
gunpowder, - - - - 233 
Lecture , Croonian , 1 
Leo , on the stars in, 3 °5 
