428 



General Index 



[Roman figures refer to the chapters, Arabic to the articles. ,] 



De tfotu (of Newton), ix. 177, 



191 

 De Mundi aetherei (of T^cho), 



v. 104 



De Nova Stella (ofTycho), v. 100 

 De Revolutionibus (of Copperni- 



cus), ii. 41 n ; iv. 74-92; v. 93, 



94; vi. 126 

 De Saturni Luna (of Huygens), 



vni. 154 

 Descriptive astronomy, xin. 272, 



273 294 



Deviation error, x. 225 n 



Dialogue on the Two Chief Sys- 

 tems (of Galilei), vi. 124^, 

 128-132, 133 



Differential method of parallax, 

 vi. 129; xn. 263 ; xm. 278 



Diffraction-grating, xin. 299 



Dione, vin. 160 



Dioptrice (of Kepler), vn. 138 



Direct motion, i. 14 



Disturbing force. See Perturba- 

 tions 



Diurnal method of parallax, xin. 

 281, 284 



Doctrine of the sphere. See 

 Spherics 



Doppler's principle, xm. 302, 



313, 3H 



Double hour, i. 16 

 Double-star method of parallax. 



See Differential method of 



parallax 

 Double stars. See Stars, double 



and multiple 



Draconitic month, n. 40, 43 

 Durchmusterung, xm. 280 

 Dynamics, vi. 133, 134; ix. 179, 



180; xi. 230, 232, 237 

 Dynamique, Iraite de (of D'Alem- 



bert), xi. 232 



Earth, i. i, 15, 17; n. 28, 29, 32, 



39, 41. 43 47, 49, 5 1 ; "i- 66, 

 69; iv. 80, 86; vi. 117, 121, 

 133; vn. 136 . 144, 145, 150; 

 vni. 153, 1 54; ix. 173, 174, 179- 



182, 184, 186, 195; xi. 228, 



245 ; xm. 285, 287, 292, 293, 



297, 320. See also the following 



headings 

 Earth, density, mass of, ix. 180, 



185, 189; x. 219; xi. 235; 



xm. 282, 294 

 Earth, motion of, n. 24, 32, 47 ; 



iv. 73, 76, 77 ; v. 96, 97, 105 ; 



vi. 121, 125-127,129-132; vin. 



161, 162 ; ix. 186, 194 ; xn. 257. 



See also Earth, revolution of and 



rotation of 

 Earth, revolution of, annual motion 



of, n. 23, 24, 28 n, 30, 47 ; iv. 75, 



77, 79-82, 85-88, 89, 90, 92; v. 



in; vi. 119, 126, 129, 131, 133; 



vn. 139, 142, 146 ; vm. 161 ; ix. 



172, 183 ; x. 207-210, 212, 227 ; 



xi. 235, 236, 240 ; xn. 263 ; xm. 



278, 282, 283 



Earth, rigidity of, xm 285, 292 

 Earth, rotation of, daily motion 



of, n. 23, 24, 28 n : iv. 75, 78, 



79 n, 80, 84; v. 105; vi. 124, 



126, 129, 130; ix. 174, 194; 



x. 206, 207, 213 ; xm. 281, 285, 



287, 320 

 Earth, shape of, n. 23, 29, 35, 



45, 47, 54; iv. 76; vm. 161; 



ix. 187, 1 88; x. 196, 213, 215, 



220, 221, 222, 223 ; xi. 229, 231, 

 237, 248 



Earth, size of, 11. 36, 41, 45, 47, 

 49 ; in. 57, 69 ; iv. 85 ; vn. 145 ; 

 vm. 159, 161 ; ix. 173, 174; x. 



221, 222, 223 



Earth, zones of, n. 35, 47 

 Earthshine, in. 69 

 Easter, rule for fixing, 11. 20 

 Eccentric, n. 37, 39, 40, 41 48, 

 51 ; in. 59 ; iv. 85, 89-91 ; vn. 



139, 15 



Eccentricit} 7 , n. 39 ; iv. 85 ; vn. 

 140 n ; xi. 228, 236, 240, 244- 

 246, 250; xm. 294, 318 

 Eccentricity fund, xi. 245 

 Eclipses, i. u, 15, 17; n. 29, 32, 



