680 INDEX 



Vol. Page 

 Thyroid Preparations, lodiue in, E. C. Kendall's Method 



of Estimating, S. B. Kuzirian XXV, 495 



Tides and Tidal Action, J. L. Tilton XIII, 207 



Till, Extra-morainic, Origin of, J. E. Todd I, /, 12 



Interloessial, near Sioux City, Iowa, J. E. Todd and 



H. F. Bain II, 20 



Sheet, Sub-Aftonian, See Sub-Aftonian. 

 Tilton, John L., Erosion by Middle River for November, 

 1891 



Strata Between Ford and Winterset I, III. 



Origin of the Pi-esent Drainage System of Warren 

 County 



The Area of Slate near Nashua, New Hampshire 



Notes on the Geology of the Boston Basin 



Results of Recent Geological Work in Madison 



County IV, 



The Switchboard and Arrangement of Storage Battery 

 at Simpson College 



A Problem in Municipal Waterworks for a Small City 



An Attempt to Illustrate Tides and Tidal Action 



Science Required for a General Education, Presiden- 

 tial Address, 1908 



Memorial of W. N. Craven 



Pleistocene Record of the Simpson College Well XVII, 



The First Reported Petrified American Lepidostrobus 

 is from Warren County, Iowa 



The Proper Use of the Geological Name "Bethany".. 



A Pleistocene Section from Des Moines South to 



Allerton XX, 213 



An Area of Wisconsin Drift Further South in Polk 



County, Iowa, Than Hitherto Recognized XXI, 219 



Memorial of D. M. Houghtelin XXII, 13 



The Extension of the Wisconsin Drift Southwest from 



Des Moines XXII, 229 



The Age of the Terrace South of Des Moines XXII, 233 



Records of Oscillations in Lake Level and Records of 

 Lake Temperature, and of Meteorology, Secured at 

 the Macbride Lakeside Laboratory, Lake Okoboji, 



Iowa July, 1915 XXIII, 91; July. 1916 XXIV, 33 



Timber, See Sleet Storm. 



Time, Measuring Small Intervals of, Apparatus for, F. C. 



Brown XIX, 185 



Tisdale, W. E., A Design for Electrical Regulation of 



High Temperature Ovens XXII. 301 



Notes on the Production and Some Electrical Prop- 

 erties of Tellurium Crystals XXII, 303 



An Electrical Device for Securing and Maintaining 



Constant High Teniperatures XXIII, 209 



