A treatise on spherical trigonometry, and its application to geodesy and astronomy, with numerous examples. By John Casey.

Index. 163
Edge, 131, 132.
Envelope, 83.
Equator, 150, 152.
Equinox, 150.
Euler, 128.
Excess (spherical), 13, 16, 30-32, 43, 44, 47, 55-57, 72, 75, 77,
78-81, 85-90, 95-98, 146-148, 156.
Frobenius, theorems by, 113, 116.
Gauss, 41.
Geodesy, 143-148.
Gergonne, 70.
Geometry (spherical), 1-8.
Girard, theorem by, 16, 17.
Gudermann, theorem by, 90.
Harmonic, 68, 71, 106-111.
Hart, Sir Andrew Searle, theorems by, 83, 117, 156, 157.
Homothetic, figures, 105.
----- points, 103, 104.
Horizon, 149, 150.
Hour angle, 150-152.
Icosahedron, 129-131.
Inclination, 129-131.
Inversion, 105, 118-127.
Involution, 158, 159.
Keogh, theorem by, 95.
Klein, 131.
Lachlan on Frobenius's theorem, 114.
Latitude, 150-155.
Legendre, 144-149.
Lemoine, 75.
Lexell's circle, 92, 93, 95, 98.
Lhuilier, 44.
Lhuilierian, 44, 45, 56, 80.
Limiting points, 101.
Locus, 4, 9, 24, 26, 38 66, 82, 92, 102, 121, 160.
Longitude, 150-155.
Lozenge, 18.
Lune, 10, 15, 97
Maximum area, 95, 159
Mean centre, 81-84.
Meridian, 149-155.
Mutual power of two circles on the sphere, 112-118.
Nagel, 84.
Napier, 35, 36, 39, 41, 65, 66.
M 2