178 INDEX. 



PAQB. 



Lecidea alboccrrulescens 42 



Lignite, Composition 130 



Origin of 129 



Living plants as geological factors . . 41 



Loess, origin of 46, 47, 48 



I\Iarchantia ' 43 



Membership of the academy 13 



Membrane bones in skull of young amphiuma 69 



Mealliferous minerals, minute quantities of, in rocks 99 



Morgan, W. J. , Sioux City water supply )22 



Me3ers, E. C. , Preparation of ammonia free water for water analysis. . . 112 



Norris, H. W. , Membrane bones in the skull of a young amphiuma.... 69 



North Dakota lignite, origin of 129 



Nosloc 43 



Nuts used as food, composition of 108 



Officers of Academy 7 



Origin of North Dakota lignite 129 



Pammel, L. H .— Beardshear, Wm. H 22 



Ecological notes on vegetation of the Uintah Mountains. 57 



Phenyl ether, preparation of ... , 1 13 



Proceedings of seventeenth annual session 17 



Pure food law, report of committee on 17 



Report of secretary 17 



Treasurer 18 



Rnwdena oreina 42 



Savage, T. E., Toledo lobe of lowan drift 123 



Scrophulariaccce of Iowa j36 



Secretary, report of 17 



Shimek , B . , Living plants as geological factors ..... 41 



Simpson, H . E. , Accretion of flood plains by means of sand bars 54 



Sioux City water supply 122 



Solar surface 74 



Summers, H . E. , presidenti d address 26 



Sun-spot observations 74 



Toledo lobe of lowan drift 123 



Turkey Buzzard 93 



Uintah Mountains, vegetation of 57 



Vegetation of Uintah Mountains 57 



Water analysis, preparation of ammonia free water for 112 



Water supply of Sioux City 122 



Weems, J. B. , Chemical composition of nuts used as food 108 



Preparation of ammonia free water for water analysis. . 112 



Wilder, F . A. , Origin of the lignites of North Dakota 129 



