LIST OF ILLUSTEATIONS. 



Secretary's Eeport: Page. 



Bridge iu Zoological Park 56 



Zebu House io Zoological Park . 58 

 Proughorn Antelope iu Zoolog- 

 ical Park 60 



lufi'a red spectrum of a rock-salt 



prism (a) 66 



lufra-red spectrum of a rock-salt 

 prism (6) 67 



Evolution of Satellites: 



Text figure Ill 



The X-Eays: 



Text figure 146 



Cathode Eays (Thomsou) : 



Plate 1 158 



Plate II 160 



Plate III 162 



Mechanical Flight (Langley) : 



Plate 1 180 



Light and its Artificial Produc- 

 tion (Lummer) : 



Text figure 276 



Text figure 284 



Text figure 288 



Exploration op Air by Kites 

 (Eotcli): 



Plate I 318 



Plate II 320 



Plate III 322 



Explorations of Upper Atmos- 

 phere (Graffigny) : 



Plate 1 306 



Plate II 308 



Plate III 310 



Crater Lake (Diller): 



Plate 1 370 



Plates II-XVI 380 



VIII 



Page. 



Letters from Andree Party: 



Plates I-VII 412 



Protective Coloration (Thayer) : 



Platel 478 



Plate II 480 



Plates III-V 482 



Omaha Totem (Fletcher): 



Plate 1 578 



Plate II 580 



Plate III 582 



Stone Implements (Philliijs) : 



Platea-X 600 



Arch-t^ological Work in Arizona 

 (Fewkes) : 



Plate I 602 



Plate II 603 



Plate III 605 



Plate IV 606 



Plate V 607 



Plates VI, VII 608 



Plates VIII, IX 609 



Plates X, XI 610 



Plate XII 611 



Plate XIII 612 



Plate XIV 613 



Plate XV 614 



Plate XVI 615 



Plate XVII 619 



Plate XVIII 620 



Plate XIX 621 



Plate XX 624 



Plates XXI-XXIII (colored).... 624 



LiHRARY OF Congress (Green) : 



Platel 626 



Plate II 628 



Plate III 630 



Plates IV-XIII 632 



