INDEX OF AUTHORS. 393 



Waterhouse (J.). Photography of the Solar Sp., 117 ; Eosin, 171. 

 "Watts (W. M.). Books, 10; Apparatus, 22; Analysis, 47, 49 ; Comets, 



73 ; Aurora, 141 ; Carbon, 154 ; Hydrocarbon, 175 ; Double Sp., 



217 ; Flame, 239 ; Iron, 269. 

 Weber (R.). Plants, 181. 



Weinberg (M.). Interference, 262 ; Wave-Lengths, 357. 

 Weinhold (A.). Apparatus, 21 ; Color, 199 ; Inversion, 264 ; Metals, 



294 ; Sodium, 339. 

 Weiss (A.). Solar in general, 99; Fungi, 172; Density, 208; Fluores- 

 cent, 245 ; Nitrogen, 304. 

 Welsbach (C. A.). Gadolinite, 247. 

 Wernicke (W.). Apparatus, 29 ; Absorption, 60 ; Bromine, 148 ; 



Chlorine, 191 ; Iodine, 267 ; Metals, 294 ; Polarized Light, 318 ; 



Silver, 336. 

 Wesendonck (K.). Carbon Compounds, 160 ; Napthalin-Red, 178 ; 



Carbonic Acid, 180 ; Fluorescent, 245; Fluorine, 246; Hydrogen, 



260 ; Silicium, 333. 



Wheatstone (C). Electric, 224. 



Wiedemann (E.). Analysis, 49 ; Pressure on the Sun, 117 ; Sun-Spots, 

 128; Carbonic Acid, 180; Constants, 200; Electric, 224,225; 

 Flame, 239; Glass, 249; Hydrogen, 260; Manganese, 286 ; Po- 

 larized Light, 318 ; Potassium, 320 ; Refraction, 326 ; Wave- 

 Lengths, 357. 



Wien (Wille). Absorption, 60. 



Wiesner (J.). Xantophyll, 186; Chlorophyll, 194. 



Wijkander. Aurora, 141. 



Wild (H.). Apparatus, 33. 



Wiley (H. W.). Uranium, 347. 



Williams (W. M). Calcium, 152; Iron, 269; Titanium, 346. 



Willigen (S. M. van der). Electric, 225; Hydrogen, 260; Metals, 294. 



Wilson (J. M.) and Seabroke. Solar in general, 99. 



Winkler. Indium, 261. 



Winlock (Prof.). Apparatus, 16, 36, 37; Solar in general, 99; Aurora, 

 141. 



Winnecke. Nebulse, 84. 



Winter (G. K.). Corona, 105. 



Wiskemann (M.). Hemoglobine, 174. 



Wleugel (S.). Indium, 261. 



