1 
INDEX. 
Page 
Action of chloric acid on metals . . ISO 
Action of sodium thiosulphate on silver salts 183 
Animal cell in the light of recent work 38 
Barr, W. M. , Action of sodium thiosulphate on silver salts 183 
Begeman , L. , A convenient voltaic cell ...... s 195 
Buchanan, R. E. , A contribution to our knowledge of the development 
of Prunus americana 77 
^ Some bacteriological examinations of Iowa waters. . . Ill 
Buried peat bed and associated deposits in Dodge township, Union 
county . . 103 
Certain basin features of the high plateau region of southwestern United 
States 254 
Chemical study of Rhus glabra 171 
Clearman, Harriett M. , Geological situation in the lava flow with refer- 
ence to the vegetation 65 
Contribution to our knowledge of the development of Prunus americana 77 
Convenient voltaic cell 195 
Cook, A. N. , New deposit of Fuller’s earth 133 
Sioux City water supply 133 
Cratty, R. I., The flora of Emmet county 201 
Finch, G. E. , Notes on the position of Nileus vigilans in strata at El- 
gin, Iowa 179 
Flora of Emmet county. 201 
Furcula in the Collembola 69 
Geological situation in the lava flow with reference to vegetation 65 
Guthrie, J. E. , Furcula in the Collembola 69 
Hendrixson, W. S. , Action of chloric acid on metals.. 150 
J( A method of determining chloric acid 147 
Periodical literature in Iowa on the subject of 
chemistry .... ......... 162 
Hill, Gershom H . , Importance of vital statistics in the study of social 
science 35 
Houser, Gilbert L. , Animal cell in the light of recent work 39 
Importance of vital statistics in the study of social science. 55 
Keyes, C. R. , Certain Basin features of the high plateau region of the 
southwestern United States 254 
Note on the Carboniferous faunas of the Mississippi val- 
ley in the Rocky Mountain region 258 
Remarkable occurrence of Aurichalcite. . ... 253 
( 281 ) 
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