LIST OF PLATES 



Facing 



The Sun and Sunspots (Maunder) : page 



Plates 1-7 174 



Electric Wave and Heat Wave Spectra (Nichols and Tear) : 



Plates 1, 2 180 



Nitrogen Fixation (Lof) : 



Plates 1^ 222 



Diamond-Bearing Peridotite (Miser and Ross) : 



Plates 1-3 272 



National Zoological Park (Hollister) : 



Plates 1, 2 290 



Plates 3-12 294 



Plates 13-20 308 



Plates 21-28 324 



Plate 29 336 



Burrowing Rodents in Soil Formation (Grinnell) : 



Plates 1-3 350 



Natural History of China (Sowerby) : 



Plates 1-A 368 



Flight of Sea Gulls (Miller) : 



Plates 1-4 398 



Gardens of Ancient Mexico (Nuttall) : 



Plates 1-4 460 



Hovenweep National Monument (Fewkes) : 



Plates 1-10 480 



Origin of American Indian (Hrdlicka) : 



Plates 1-A 482 



Plates 5-8 486 



Plates 9-12 490 



Plates 13-17 494 



Ruined Cities of Palestine (Sutton) : 



Plates 1^1 512 



Plates 5-8 518 



Volcanic Steam : 



Plates 1, 2 520 



Tidal Power (Turnbull) : 



Plate 1 523 



Sir James Dewar (Crichton-Browne) : 



Plate 1 547 



J. C. Kapteyn (Van Maanen) : 

 . Plate 1 555 



VII 



