rONTKNTS. 



VTT 



Prehistoric New Mexican Potlcrv, by !Iciny Hales ;">:{."> 



l\elics of an Iiuliau lluiitiny (iroiiud, l)y At reus Wanner r>5r» 



Al>original Bnrial Monnds in Ohio, hy R. J. Thoni])son f.Tl 



Indian Remains on tlie Upper ^■ello\vstont', liy William S. lirackelt 577 



I'j-imitive Number Systems, by Levi ]'. Conant r>X'.\ 



Autliropology of the Brain, by D. K. yiiutc ~t'.)r> 



Tlic Birth of Invention, by Otis T. Mason UQ'A 



American Inventions and Discoveries in Medicine, etc., by John S. ]!illin.i;s .. (;i;{ 



Endowment for Scientitic Research, by Addison Brown (i2l 



The Inventors of the Telej^jraph and Telephone, by Thomas ( Jray fi)!!! 



Ex]dorations in Mongolia and Tibet, by W. W. I'oekhill (init 



Progress of Astronomy for 1S91 and bS92, by W. C. Wiiilock tISl 



Indkx 775 



LIST OF ILLI'STRATIONS. 

 Secretary's Report : 



Fig. 1, idau of the National Zoological Park 



Fig. 2, bear dens ami yards 



Fig. 3, princii)al animal honse of Zoidogical I'ark... 



Eig. 4, plan of jjrincijial animal honse 



Fig. 5, honse for bison and elk 



(Geological history of the Yellowstone National Park : 



Fig. 1, map of the Yellowstone National Park 



40 

 41 

 42 



II 

 i:>(; 



Discharge of Ele(tricit> withont 



Electrodes: I'aiic. 



Pig. 1 230 



Figs. 2,3,4,5 234 



Fig. 6 23i) 



Figs. 7, 8 243 



Figs. 9, 10, II 244 



Fig. 12 246 



Fig. 13 249 



Fig. 14 250 



Fiji-. 15. 



ilolecnlar Process in Magnetic In- 

 d net ion : 



Fig. 1 



I'ig- ^ 



Figs. 3, 1 , 5, () 



Figs. 7, S, 9 



Figs. 10, 11 



Fig. 12 



Fig. 13 



Fig. 14 



Fig. 15 



Crystallization : 



Fig. 1 



Figs. 2,3... 



Fig. 4 



Fig. 5 



-.1 



257 



25^ 

 259 

 260 

 261 

 262- 

 264 

 2(55 

 26() 



271 

 272 

 273 



274 



Crystallization — Con tinned. 



' Fig. 6 



Fig. 7 



Dednction from the (Jaseons 'I'lie- 

 ory of Solntion : 



I'i^. 1 



Fig. 2 



Fig. 3 



Hnggestions KVgar<ling Solnlions 

 and licpiids: 



Fig. 1 



Fig. 2 



Present Problems in Fvolntion and 

 Heredily : 



Fig. 1 



Figs. 2,3 



Pigs.4,5 



Fig. 6 



Fig.7 



Figs. S, 9 



Fig. 10 



Fig.ll 



Fig. 12 



The Empire of the Air: 



Fig. 1 



i"ig. 2 



Fiir.3 



276 

 277 



293 

 29 1 

 2! 15 



300 



3()S 



33(5 

 312 

 343 

 314 

 355 

 356 

 3(!0 

 363 

 3(i4 



107 

 429 

 431 



