Table of Contents
Academy Business
| Officers, Committees, Minutes, Winter Meeting | |
| 2-26 |
Memorials
| Theodore Henry Allebach | |
| M. G. Mellon | 27-28 |
| William Franklin Baker | |
| Karl R. Thompson | 29 |
| Elias J. Chansler | |
| Wm. R. Chansler | 30 |
| Glenn Culbertson | |
| Wm. A. Millis | 31-32 |
| Charles Redway Dryer | |
| L. J. Rettger | 33-34 |
| Carl H. Eigenmann | |
| Fernandus Payne | 35-46 |
| Charles Wesley Hargitt | |
| Andrew J. Bigney | 47-52 |
| Claude H. Harshbarger | |
| Paul Weatherwax | 53-54 |
President's Address
| President's Address—More Scientific Education; Less Educational Measurement | |
| Frank B. Wade | 55-58 |
Papers--General
| New Harmony | |
| David Starr Jordan, Amos W. Butler | 59-62 |
| Aerial Photography for Indiana | |
| T. M. Bushnell | 63-72 |
| Perverted Benevolence as an Influence upon Racial Development | |
| Gerard Fowke | 73-80 |
| A Plea for John R. Kissinger | |
| R. A. Gantz | 81-82 |
| Making Bibliographies More Useful | |
| M. G. Mellon | 83-86 |
| Nature Guiding at Turkey Run State Park | |
| Sidney R. Esten | 87-89 |
Papers on Geology, Geography, and Archaeology
| Copper Nugget Found at Turkey Run | |
| Sidney R. Esten | 90 |
| Theory of Thunderstorms | |
| Daniel Hull | 91-92 |
| The Distribution of Precipitation in Relation to the Mississippi Basin Flood of 1927 | |
| J. E. Switzer | 93-100 |
| Geography of Indiana Agriculture | |
| S. S. Visher | 101-116 |
| Further Observations of the Erosion of Clifty and Butler Ravines, Jefferson County, Indiana | |
| J. Archer Culbertson | 117-119 |
| Notes on Some Ohio River Terraces | |
| J. Archer Culbertson | 120-124 |
| Some Interesting Physiographic Features of the Upper Wabash Drainage Basin in Indiana | |
| Robert R. Shrock | 125-140 |
| Physiography of the Kankakee Region | |
| T. M. Bushnell | 141-142 |
| The Litten Natural Bridges and Closely Associated Phenomena, Eastern Owen County, Indiana | |
| Arch R. Addington | 143-152 |
| An Analysis of Erosion | |
| Clyde A. Malott | 153-164 |
| Archeological Investigations in Greene County | |
| W. N. Logan | 165-174 |
Papers on Chemistry, Physics, and Mathematics
| A Method of Studying the Form and Intensity of an Explosive Sound Wave | |
| Darrell B. Green | 175-178 |
| Some Atmospheric Electric Potential-Gradient Measurements at High Altitude | |
| J. F. Mackell | 179-184 |
| Induction and Radiation | |
| R. R. Ramsey | 185-196 |
| Mechanism of a Condensed Spark Discharge | |
| Harvey A. Zinszer | 197-204 |
| Velocity of Sound in Free Air | |
| Arthur L. Foley | 205-208 |
| Thermal Conductivity of Condensing Vapor Films | |
| Herman A. Wenzke | 209-214 |
| The Calibration of Radio Frequency Galvanometers and MilliAmmeters | |
| J. B. Hershman | 215-218 |
| Three Electrodes Vacuum Tube Oscillator, a Special Case of Parallel Resonance | |
| Eung Tyun Cho | 219-222 |
| Energy Losses in Railroad Track Hammers | |
| Edwin Morrison | 223-224 |
| Scattering of Light by Small Particles | |
| Edwin Morrison | 225-226 |
| Some Observations of the Properties of Certain So-Called Thermal Insulators | |
| John B. Dutcher | 227-232 |
| Some Properties of Pin Hole Sound Probes | |
| James E. Brock | 233-238 |
| A Calorimetric Determination of Core Losses in High Frequency Transformers | |
| B. A. Howlett | 239 |
| A Magnetic Method for the Determination of the Elastic Limit of Iron and Steel | |
| B. A. Howlett | 240-244 |
| The Role of Valence and Electrons in the Teaching of General Chemistry | |
| W. M. Blanchard | 245-254 |
| The Analysis of Electrolytically Deposited Lead Peroxide by the Method of Lux | |
| M. G. Mellon, W. F. Reed, H. L. Wilkins | 255-258 |
| Food Fakes and Fancies | |
| R. H. Carr | 259-262 |
| An Efficient Stirrer for Gas Absorption | |
| A. F. Benning | 263-264 |
| Case-Carburization in Presence of Ferrosilicon | |
| R. C. Spencer, E. G. Mahin | 265-268 |
| Colloidal Arsenic Trioxide in the Arsenic Determination | |
| E. G. Mahin, A. F. Doyle | 269-271 |
| The Diffusion of Hydrogen in Iron | |
| E. G. Mahin | 272-276 |
| Notes on the Lines of Force in a Plane Electrostatic Field Containing Two Charges | |
| C. K. Robbins | 277-278 |
| The Aurora Borealis | |
| Elmer A. Smith | 279-282 |
| The Validity and Interpretation of Mathematical Formulas | |
| Will E. Edington | 283-286 |
| Two New Navigation Instruments | |
| W. A. Cogshall | 287-292 |
Papers on Bacteriology, Physiology and Hygiene
| Agglutinin Production: Total Amount Injected Varied, Dosage and Frequency of Injections Constant | |
| Charles A. Behrens | 293-296 |
| Preservation of Isohemagglutinating Serum with Phenolized Glycerol | |
| Marcus Ward Lyon Jr. | 297-298 |
| Antaeus—Contact with the Soil | |
| Robert Hessler | 299-308 |
| The Longevity and Swimming Ability of Spermatozoa | |
| Benj. H. Grave, Ralph C. Downing | 309-310 |
| A Study of Schoolroom Ventilation, Involving a Comparison of Two Types of Heating and Ventilating Plants | |
| R. A. Gantz, Harriet Thornhill Phypers | 311-316 |
Papers on Botany
| Notes on the Technique of Plant Mounting | |
| J. A. Nieuwland, Arthur Slavin | 317-318 |
| Recent Indiana Weeds, 1927 | |
| Albert A. Hansen | 319-320 |
| Plants New or Rare in Indiana— XIV | |
| Chas. C. Deam | 321-324 |
| Monstrosities in Trillium | |
| F. M. Andrews | 325 |
| Modified Narcissus Flowers | |
| F. M. Andrews | 326 |
| Deposition of Material by Water Plants | |
| F. M. Andrews | 327-328 |
| A Study of Lichens | |
| F. M. Andrews | 329 |
| Some Flowering Plants of Monroe County, Indiana | |
| F. M. Andrews | 330-334 |
| Observations on the Teratology of the Genus Cuscuta | |
| T. G. Yuncker | 335-338 |
| Holdfast Cells in Spirogyra | |
| Fredda Doris Reed | 339-340 |
| Plant Diseases in a Home Garden | |
| E. B. Mains | 341-354 |
| Observations Concerning Clover Diseases | |
| E. B. Mains | 355-364 |
| Indiana Fungi— X | |
| J. M. Van Hook | 365-372 |
| Structure of Some Carboniferous Plants from Illinois | |
| J. Hobart Hoskins | 373-376 |
| The Ferns of Turkey Run | |
| Otto Behrens Jr. | 377-380 |
| New Yellows Resistant Varieties of Cabbage in Indiana | |
| C. T. Gregory | 381 |
| Controlling Tomato Leaf Mold in Greenhouses in Indiana | |
| C. T. Gregory | 382-384 |
| Excess Soluble Salts as the Cause of Vegetable Diseases in Greenhouses | |
| S. D. Conner, C. T. Gregory | 385-390 |
| Ecological Relationships of Fungi and Cultures | |
| C. L. Porter | 391-394 |
| Hydrogen Ion Studies of Water, Peat, and Soil, in Relation to Ecological Problems at Bacon's Swamp, Marion County, Indiana | |
| Stanley A. Cain | 395-402 |
| The Bog Clearweed, Adicea fontana Lunell, in Indiana | |
| Marcus Ward Lyon Jr. | 403-404 |
| The Relation of Lime to the Absorption of Iron by Plants | |
| William P. Allyn | 405-410 |
| Indiana Plant Diseases, 1926 | |
| Max W. Gardner | 411-426 |
| Mycorrhiza Bearing Species in the Vicinity of Lafayette, Indiana | |
| K. D. Doak | 427-440 |
Papers on Zoology and Entomology
| Records of Blueberry Insects in Indiana | |
| K. D. Doak | 441-444 |
| Insects of Indiana for 1927 | |
| J. J. Davis | 445-460 |
| Notes on Birds of Lake Maxinkuckee Region | |
| Samuel E. Perkins III | 461-466 |
| Summer Resident Birds of Turkey Run State Park | |
| Frederick H. Test | 467-472 |
| The Occurrence of the Starling at West Lafayette, Indiana | |
| Louis Agassiz Test, Frederick H. Test | 473-474 |
| The Starling in Madison County, Indiana | |
| Louise S. Swain | 475-478 |
| The European Starling in Indiana | |
| Amos W. Butler | 479-480 |
| Some Interesting Indiana Bird Records | |
| Amos W. Butler | 481-488 |
| Nesting of the Sycamore Warbler | |
| Amos W. Butler | 489-490 |
| A List of Reptiles and Amphibians Taken in Marion County, Indiana, in 1924-1927 | |
| Stewart Springer | 491-492 |
Back Matter
| List of Members | |
| 493-516 |