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MEMORIALS

'fhomasIIenry FrederickIIuston Macbride------Wickham ______;.______3337 IIerbert Grant Campbell------40 Omar E. Lowman------42 Floyd .August Nagler------43

TITLES OF PAPERS PRESENTED

.Address of the President - 'fhe Future of Science, E. J. Cable______49 .Adddress of the Guest Speaker - Chemistry and Recent Progress in Medicine, Dr. Julius Steiglitz 1------ Demonstration: 'fhe Cathode Ray Osillograph and Its .Application to the Study of .Acoustic Phenoemna, Joseph 'fiffin and Don Lewis---- Botany and Bacteriology Some factors influencing the respiration of Rhizobium, D. Wynne 'fhorne and R. II. Walker------63 Stomata! count of a single leaf of Colocasia, John .A. Yarbrough____ 71 Fermentation of artichokes, IIoward Reynolds and C. II. W erkman____ 75 Leaf surface of a twenty-year-old Catalpa tree, Franklin M. 'furre!L_ 79 'frials with a bacteriological method for measuring available phosphorus in soils, F. B. Smith, P. E. Brown, and C. C. Mensing______85 'fhe effect of low temperature on the germination and survival of native oaks, J. M . .Aikman------89 Origin and development of the vascular bundle of Zea mays L., .Arthur L. IIersheY------95 Notes on Iowa mosses - VI, Lucy M. Cavanagh------97 Some methods of labeling nature trails, John Moore______103 Mosses of southwestern Iowa, Geneva Sayre and II. S. Conard------105 .A twenty-year's phenological record of the spring flowering plants of IIenry County, Ellsworth Dodds and II. E. Jaques (.Abstract)______107 Shortening the rest period of the tubers of the Jerusalem artichoke (IIelianthus tuberosus) L., E. S. IIaber (Abstract)---,------111 'fhe foliar embryos of 'folmiea Menziesii, John .A. Yarbrough (.Ab- stract) ------111 Some similarities of nuclear organization in the basidium and the animal spermatocyte, J. E. Sass (.Abstract)------112 Notes on the life history of .Aphanizomenon flos-aquae, E. 'f. Rose (.Abstract) ------~------112 'f&e basidium, Donald P. Rogers (.Abstract) (Introduced by G. W. Martin) ------112 On the significance of the minor venation of foliage leaves, Robert B. Wylie (.Abstract)------113 Scotch pine (Pinus sylvestris) as a member of the Iowa flora, Guy West Wilson (.Abstract)------113 Inheritance of fruit shapes and sizes in the pepper and tomato, E. W. Lindstrom (Abstract)·------114 .A variant of Quercus alba L., J. N. Martin (.Abstract)------114 'fhe distribution and life-history of 'frillium nivale Riddell, J. N. Mar ~ (.Abstract)------115 1 Emeritus Professor of Chemistry, University of Chicago. Published by UNI ScholarWorks, 1934 17 1 Proceedings of the Iowa Academy of Science, Vol. 41 [1934], No. 1, Art. 3

18 IOWA ACADEMY OF SCIENCE [Vor.,. XLI

Plant cover map of the Lake Wapello watershed, Davis County, Iowa Albert F. Dodge (Abstract)------115 Fungi associated with tree cankers in Iowa, I, J. C. Gilman, G. L. McNew, and G. N. Davis (Title)------The moss-genus Grimmia in Iowa, Geneva Sayre ______Geological history of plants : a chart, L. Sargent and H. S. Conard ___ _ Chemistry, General and Physical The significance of carbon dioxide in making phosphorus available in the soil, H. C. Millar and F. B. Smith------117 The heat capacity and the free energy formation of naphthalene, J. N. Pearce and W. B. Tanner------123 A comparison of different types of glass electrode for determining the pH of soils, Harold L. Dean and R. H. Walker------127 Is there a deficiency of available potassium in so-called alkali soils of Iowa? Hartzell C. Dean (Abstract)------133 The influence of salts on the velocity of inversion of sucrose at 25°, J. N. Pearce and Margaret E. Thomas (Abstract)------139 The chemical bond in general chemistry, Ben H. Peterson (Abstract) 139 The thermal decomposition of hexane at high pressures, J. N. Pearce and James W. Newsome (Abstract)------139 The adsorption of certain ketones and esters by activated charcoal, J. N. Pearce and Arthur C. Hanson (Abstract)------140 Some observations of the boiling points of ternary liquid mixtures, John Dunham and W. C. Oelke (Abstract)------141 The use of electron tubes as super-sensitive relays, W. C. Oelke (Ab- stract) ------141 The dipole moments of certain organic compounds, J. N. Pearce and Luther F. Berhenke (Abstract)------141 The salt effect of oxidation and reduction potentials, Ben H. Peterson and Jesse L. Burgess------ Some notes on the early religion of western Indians, Albert B. Reagan Some observations on the activity of solvent and solute in aqueous solutions of strong electrolytes, J. N. Pearce ______

Chemistry, Organic and Biological The effect of fluorine on blood and respiration, D. A. Greenwood, E. A. Hewitt and V. E. Nelson------143 Studies on vitamins B and G, J. F. Feaster and V. E. Nelson______149 The removal of fluorine from drinking waters in the state of Iowa, C. A. Kempf, D. A. Greenwood and V. E. Nelson------153 Thiele's theory of partial valency in terms of electrons, Francis Earl Ray ------157 Aluminum in nutrition, H. H. Keil and V. E. Nelson------161 Use of copper to increase the yield of ethyl bromide, Philip Hendrix- son (introduced y L. P. Sherman) (Abstract)------165 The availability of tryptophane derivatives for supplementing diets de ficient in tryptophane, Clarence P. Berg and H. Everett Hanson (Ab- stract) ------165 Orientation in the dibenzofuran series, W. G. Bywater, E. W. Smith, G. E. Brown, and H. Gilman (Abstract)------166 A study of total and reduced glutathione with oxygen content and ca pacity in the blood of pregnant and non-pregnant women, Fred W. Oberst and E. B. Woods (Abstract)------166 The oxidation of glucose by Rhizobium meliloti, 0. R. Neal and R. H. Walker (Abstract)------167 Alcohol motor fuels, Leo M. Christensen, R. M. Hixon and E. I. Fulmer (Abstract)------168 Reduction of furan and the preparation of tetramethylene derivatives, Donald F. Starr and R. M. Hixon (Abstract)------169 The alkaline decomposition of wood keratin, Mildred Barr and Rachel Edgar (Abstract)------170 https://scholarworks.uni.edu/pias/vol41/iss1/3 2 et al.: Table of Contents

1934] PAPERS PRESENTED 19

Hydrolysis velocity of ketimines-steric hindrance effect, J. B. Culbert- son, William Reynolds and Clarence Main (Abstract)______170 Behavior of bromine derivatives of guaiacol toward nitrating agents, L. Charles Raiford and R. E. Silker (Abstract)------171 The acid and alkaline hydrolysis of silk fibroin, Eunice Walde and Rachel Edgar (Abstract)------171 Hydrolysis of phenyl fury! ketimine - the relative negativity effect, J. B. Culbertson and Leonard Hines (Abstract)------172 Pyridine and quinoline derivatives of dibenzofuran and their physio logical properties, Willard H. Kirkpatrick and Henry Gilman (Ab- stract) ------172 Some chemical properties of vitamin E, H. S. Olcott (Abstract)______173 Further studies on the nutritive value of alcohol-extracted animal tis- sues and the supplements required for growth and lactation, walter H. Seegers and H. A. Mattill (Abstract)------173 The production of kynurenic acid from tryptophane and indole deriva tives, Lyle C. Bauguess and Clarence P. Berg (Abstract)------174 Geology Weathering of sandstone in the Iowa state capitol building, C. S. Gwynne ------177 The Hampton tusk, E. J. Cable------191 A pre-Wisconsin valley in southwestern Hancock county, L. W. Wood 199 Some observations on the thermal springs of Southeastern Black Hills of South Dakota, P. Murray Work------203 Cycles of erosion in the central Black Hills, P. Murray Work______209 Utilization of the Navajo country, Albert B. Reagan______215 The "Ledges" and Pennsylvanian problems in Iowa, John E. Smith (Abstract------·------239 Geographic control of industries in Iowa, John E. Smith (Abstract)__ 239 Reconstruction of Iowa's Cretaceous stratigraphy, Charles Keyes (Ab- stract) ------239 Extent of Patrician glaciation, Charles Keyes (Abstract)------240 What is the Loveland Loess? Charles Keyes (Abstract)------240 Terraced deposit of an extinct thermal spring in South Park, Colorado, Don B. Gould (Abstract)------241 A contribution to the subsurface geology of Iowa, A. C. Tester------Metamorphosed calcareous concretions, R. G. Hamilto_n ______Structural significance of metamorphosed calcareous concretions, J. J. Runner ------Reclassification of the Cambrian of Iowa, A. C. Trowbridge ______Some recently discovered fossil Echinoderms, B. H. Beane ______Geological aspects of the occurrence of fluorine in Iowa well waters, C. S. Gwynne------Changes in the geologic time-table, Lee 0. Yoder ______The place of geology in the elementary and junior high school curricu lum, P. Murray Work------Mathematics The effect of increasing the size of samples in certain distributions, Fred A. Brandner------243 The use of expected numbers in analysis of variance with dispropor- tionate sub-class numbers, G. W. Snedecor ------ Certain sets of two-squares, W. J. Rusk------ The evolution of the function concept, M. E. Graber------History of the notation of mathematics, Catherine Walliker ______Iterated functions for the characteristic vibrations of a clamped beam, D. L. HolL------Computation of annuities with nominal interest rates, J. F. Reilly ___ _ The international mathematical congress at Ziirich, J. S. Turner______ApplicationsMarian E. ofDaniells elliptic ______functions to certain :______problems in plane cubics, _ Published by UNI ScholarWorks, 1934 3 Proceedings of the Iowa Academy of Science, Vol. 41 [1934], No. 1, Art. 3

20 IOWA ACADEMY OF SCIENCE [Vor.. XLI

Mechanical grade averagers, Karl E. Gaylord------ Convergence of series defined by recurrence relatio_ns, C. C. Hurd_7 __ The circular solutions of the two body problem m electro-dynamics, J. S. Turner------Conic sections in the elliptic plane, Dwight Goodner------The dilution method for bacterial census, E. S. Allen ______An elementary method for the computation of logarithms, E. W. Chit- tenden ------Physics An experiment in gravitation, W. H. Kadesch and R. D. Huntoon (Abstract) ------247 Psychophysical analysis of color blindness, A. A. Benedict (Abstract) 248 An effect of cathode rays on photographic paper, P. H. Carr (Abstract) 248 The M-series absorption spectrum of metallic bismuth, W. D. Phelps, (Abstract) ------249 A study of the cybotactic group structure in isopentane near the critical point, Carl A. Benz (Abstract)------249 Structure of solutions of strong electrolytes in n-alcohols and water, G. W. Stewart (Abstract)------...: 250 Comparison of x-ray diffraction in H.O and Hf-0, G. W. Stewart (.Abstract) ------251 Hyperfine structure and the depolarization of resonance radiation by a magnetic field, A. Ellett (Abstract)------251 A mechanical method for the analysis of complex spectra, J. V. Atana- soff and A. E. Brandt (Abstract)------252 Effect of additions of cadmium on growth of zinc crystals, E. P. T. Tyndall (Abstract)------252 Electrical resistivities of zinc single and mosaic crystals, W. J. Poppy (Abstract) ------252 Thermal conductivity and Wiedemann-Franz ratio for zinc crystals, C. A. Cinnamon (Abstract)------253 The dependence of cybotactic groups on specific volume, Ross D. Spang- ler (Abstract)------253 Serviceable homemade apparatus, E. H. Collins (Abstract)______254 Change in resistance of bismuth single crystals at the melting point, J. H. Schroeder (Abstract)------254 A study of laboratory teaching, J. W. Woodrow (Abstract)______255 Experiments on the effectiveness of lectures in college physics, C. ]. Lapp (Abstract)------255 Some experiments on the teaching value of talking motion pictures in college physics, C. J. Lapp and W. J. Poppy (Abstract)______256 A study of some transfer values of laboratory versus library projects, W. J. Poppy and C. ]. Lapp (Abstract)------256 Electron collisions in mercury vapor, the 9.8 volt loss, C· J. Cross and A. J. Eldridge (Abstract)------257 Mean free paths of molecules and wave mechanics, J. A. Eldridge (Ab- stract) ------~------257 The purpose and content of the course in general arts physics, M. E. Graber ------Notes on the use of the Weston photronic cell as a photometer, Howard Nicolaysen ------Psychology An analytical study of the common elements in silent and oral reading, Donald E. Swanson------259 An analysis of the functional timbre variations of the violin, Arnold M. Small------263 Some supplementary devices for improving laboratory results, M. R. Jones ------265 Stimulus-response factors in infantile plantar phenomena, Thomas W. Richards ------~------269 https://scholarworks.uni.edu/pias/vol41/iss1/3 4 et al.: Table of Contents

1934] PAPERS PRESENTED 21

An experimental study of social maturity in young children Harold M. Williams ______:______271 Measurement of aesthetic interests. Alvhh R. Lauer------275 A criterion of driving ability, Earl Allgaier------281 Course content and objectives, R. H. Sylvester______285 The relative importance of intensity and time stress in singing, Harold G. Seashore------287 A case of art ability following sight recovery in seven-year-old child blind from birth, Norman C. Meier______291 A new departure in mental measurements, D. D. Feder------295 Tone quality of orchestral instruments, D. A. Rothschild (Abstract)__ 299 A photographic study of the use of intensity by superior speakers, Max D. Steer and Joseph Tiffin (Abstract)------300 The effectiveness of learning programs designed to change attitudes toward self-reliance, Ralph J. Ojemann ______Critique of pitch factors in experiments on audition, Scott N. Reger __ Making use of a general objective in educational research, W. A. Saucier ------Childrens preferences among play materials as determined by paired comparisons of pictures, Thomas H. Vance and Louise T. McCaJL __ _ The effect of diet on intelligence and learning, M. F. Fritz ______Development of sitting and standing in infants (motion pictures), Orvis C. lrwin------A method of teaching psychology, V. E. Stansbury ______Zoology The general morphology of the Elasmobranch hypophysis, H. W. Nor- ris and Jack Maxfield------301 A progress report of a survey of the insects of Iowa, H. E. Jaques__ 305 Notes on the hatchability and infectivity of refrigerated eggs of Fas- ciola hepatica Linn., Wendell H. KrulL------309 Effects of ultracentrifuging on certain cell structures, R. L. King and H. W. Beams (Abstract)------313 Respiratory mechanism of blocked and normal embryonic cells ( Ortho- ptera), J. H. Bodine and E. J. Boell (Abstract)------313 Seasonal variation in birds, Emil Witschi (Abstract)------314 Some factors in radiosensitivity, T. C. Evans (Abstract)______315 The development of the Pronephros in the California newt (Triturus torosus), Gardner M. Riley (Introduced by E. Witschi) (Abstract) 315 Studies of the electromotive force in biological systems: IV. The effect of carbon monoxide on the E. M. F. of frog skin, A. B. Taylor and E. J. Boell (Introduced by J. H. Bodine) (Abstract)______316 A study of the inheritance and the physiological behavior of dwarfism associated with an eye defect in rats, A. Sciuchetti and W. V. Lam- bert (Abstract)------317 A new character of the guinea pig- "silvering," W. V. Lambert (Ab- stract) ------318 Further studies on selection for resistance to Salmonella aertrycke in mice, H. 0. Hetzer (Abstract)------319

Published by UNI ScholarWorks, 1934 5