The Iowa State University Digital Repository provides open access to the full-text of many theses and dissertations completed at Iowa State University. From this page, you can either browse our theses and dissertations by academic department or by the year of completion.

Some Iowa State theses and dissertations are not eligible for open access. These may be accessible, with some restrictions, via ProQuest/UMI. On the ProQuest site, the full text of Iowa State's digital theses and dissertations can be viewed by members of the Iowa State community (current students, faculty, and staff) or individuals searching from Iowa State campus IP addresses. Others can view only the first 25 pages of a thesis or dissertation from Iowa State

Finally, some Iowa State theses and dissertations exist only in paper format. For more information, see How to find dissertations and theses through the Iowa State University Library, or contact your subject librarian.

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Interdisciplinary Majors and Programs
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Theses/Dissertations from 1928

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Genitalia of pentatomidae , Oscar Waldemar Rosewall

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Reactions of liquid hydrogen sulfide on metals and oxides , Sitaram D. Satwalekar

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Specific effects of feeding different amounts of potassium iodide and salt on the character of the wool production of breeding ewes and their lambs, Maynard Goldman Snell

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Inheritance of certain seed-coat colors in soybeans (Soja max), Ralph T. Stewart

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Studies in home canning, Gertrude Sunderlin

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Physiological action and chemical constitution: new local anesthetics, Clarence C. Vernon

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Clarification of milk for American cheddar cheese, G. Wilster

Theses/Dissertations from 1927

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Studies on the toxicity of hydrogen cyanide , James B. Allison

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Supplements to a milk diet for dairy calves , Clawson Y. Cannon

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The properties of starch with relation to time of formation of starch gels , Oliver Wendell Chapman

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Studies with glucose derivatives: Part I, The digestion of pectin and methylated glucoses by various organisms; Part II, The structure of chloralose derivatives , Harold W. Coles

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The relation of some physical and chemical properties of oil emulsions to their insecticidal efficiency, Lester Lamar English

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Some chemical and biological effects of sulfur fertilization, James Milton Fife

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The preparation, acid hydrolysis and magnetic transformation of iron carbide , Waite Philip Fishel

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Part I. Some aliphatic local anaesthetics, Part II. The physical constants of organomagnesium halides, Leon C. Heckert

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Wool studies with Rambouillet sheep, Fred S. Hultz

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A study of some of the lactobacilli, Lincoln Spencer Hyde

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I The heat of formation of cementite as electrolyzed from a pure iron carbon alloy of eutectoid structure and composition II The signicicance of pH determinations in relation to hydrogen ion concentrations in mixed electrolyres [sic] III A proposed diagram for the ternary system iron-carbon-silicon, William Harney Jennings

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Ants and their relation to aphids, Charles Richardson Jones

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Toxicity of hydrogen cyanide gas on animal life, Edward G. Kelly

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The genetics of plumage color in poultry, C. W. Knox

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A study of the preparation of sirups , Everett E. Peterson

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Thiohydrolysis in solutions in liquid hydrogen sulfide , Anderson Wheeler Ralston

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Organometallic compounds of group II , Ferdinand Schulze

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The effect of nickel upon the stability of iron carbide and upon the microscopic structure of white cast iron compositions, Milo J. Stutzman

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Reduction by hydrogen, R. B. Waite

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Physiological studies on the nitrogen fixing bacteria of the genus Rhizobium, Rudger H. Walker

Theses/Dissertations from 1926

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The heat of formation of cementite as electrolyzed from a pure iron-carbon alloy of eutectoid structure and composition , George Hendrie Brodie and William Harney Jennings

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Study of the metabolism of Bacterium coscoroba on gluconic acid , Buford H. Butcher

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The equilibrium attained for the system hydrogen, bromine vapor and hydrogen bromide under the influence of the corona discharge , J. J. Canfield

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The fixation of atmospheric nitrogen by yeast , Leo M. Christensen

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Some effects of limestone and hydrated lime on bio-chemical activities in acid soils , Henry Dorsey

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The influence of time and temperature on the swelling of gluten , Werner W. Duecker

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The graphitizing behavior of iron carbide in pure iron-carbon alloys for the temperature interval 7000 C to 11000 C, Harry Parker Evans

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Studies on North American Oecanthinae (Orthoptera): I. Physiological variation in the snowy tree cricket, Oecanthus niveus De Geer, II. Tree crickets of Oregon, III. Geographical variation in the nigricornis group of Oecanthus, Bentley Ball Fulton

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I. The reaction of nitro compounds (including war gases and explosives) with organomagnesium halides; II. Study on anti-knock materials, the preparation of tetra-styryl lead , Roy McCracken

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Highway traffic and its regulation , Sue-Hin Pan

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The preparation and reactions of the lower chlorides and oxychlorides of silicon , Joseph Bradley Quig

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The solubility of rock phosphate as influenced by sulphur and gypsum , Winfield Scott

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Studies on the effects of method of application of fertilizers to some common field crops , Frederick Burean Smith

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The colon-typhoid group of bacteria and related forms: Relationships and classification, John C. Weldin

Theses/Dissertations from 1925

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Studies on soil fungi , Ernest Victor Abbott

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I. Organic oxygen antiseptics, II. The constitution of aliphatic diazo compounds, III. Anti-knock compounds , Chester Elgin Adams

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I. The electronic interpretation of reactions applied to halogen organic compounds, II. A study of antiknock compounds , Nathaniel John Beaber

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The decomposition of potassium chlorate: II, The spontaneous decomposition temperatures using various proportions of manganese dioxide, and of ferric oxide, and a mixture of manganese dioxide and ferric oxide as catalysts , James Austin Burrows

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A genetic study of certain chlorophyll deficiencies in maize , William Angus Carver

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On the acceleration of lipase activity caused by the action of substances containing vitamin A, Birger L. Johnson

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The design of a general-purpose tractor, H. B. Josephson

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A new bacterial leaf spot (pseudomonas sp) on holcus sorghum l and Zea mays L., James Blair Kendrick

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I. A method for the determination of area of earth materials; II. Some factors affecting base exchange in soil and subsoil , Douglas Verne Moses

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A study of crown gall caused by Bacterium tumefaciens on rosaceous hosts , J. H. Muncie

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A comparative study of measured and computed stresses in the Thirteenth street bridge over Skunk River near Ames, Iowa, Harry G. Neyenesch

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I. The correlation of some aromatic types with physiological action, Local anesthetics containing the furan, thiophene and pyrrole nuclei; II. Studies in reduction: A. The existence of hydrogenmagnesium halides, B. The reduction of azo compounds , Russell Marion Pickens

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Normal corn prices, Geoffrey Seddon Shepherd

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The form of legume nitrogen assimilated by non-legumes when grown in association, James Henry Stallings

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Response of phytophthora species to physical stimuli and certain organic compounds, B. N. Uppal

Theses/Dissertations from 1924

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Biochemical effects of gypsum on Iowa soils , Walter Beno Bollen

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Studies on the comparative cytology of the annual and biennial varieties of Melilotus alba , Edward F. Castetter

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The effects of various methods of applying fertilizers on crops and certain soil conditions , Dana G. Coe

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Studies on the relation of Puccinia graminis Per and Puccinia coronata Corda to Avena species , S. M. Dietz

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Transmissibility and pathological effects of the mosaic disease, Otto Herman Elmer

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The nitrogen-metabolism of nitrogen-fixing bacteria, William Vernal Halversen

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The stability of iron carbide and calculations of its heat of formation from equilibrium studies , Harold L. Maxwell

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The effect of pressure on the decomposition of potassium chlorate in the presence of manganese dioxide , Henry Max McLaughlin

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The acquisition of food by the honeybee , Oscar Wallace Park

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A study of reactions in liquid hydrogen sulphide , George Norman Quam

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Temperature and the growth of yeast , Frank F. Sherwood

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The translocation of the food materials of the wheat seedling, L. Edwin Yocum

Theses/Dissertations from 1923

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An appraisal of institutions furnishing credit for Iowa Agriculture, Joseph Lambert Benson

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Dry rot of corn , L. W. Durrell

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Nitrification and the nitrifying organisms Part I, Nitrifying organisms Part II, Certain conditions affecting the oxidation of ammonia and nitrite nitrogen Part III, Nitrates and nitrification in field soils, Rayadurg Nagan Gowda

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A study of the action of certain bacteria, yeasts and molds on the keeping quality of butter in cold storage, Michael Grimes

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The dietary properties of yeast, Victor G. Heller

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A study of the properties of wheat starch with reference to the baking qualities of flour , Glenn Garnet Naudain

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An analysis of the power requirements of ensilage cutters, Vern W. Stambaugh

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The liberation of potassium from feldspars, and of potassium and carbon dioxide from soils by fertilizer and acid treatments, Silvere Cyril Vandecaveye

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Principles and practices involved in the breeding, feeding, and management of pure-bred draft horses in the United States, Valente Estrada Villegas

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The development of a test to determine the durability of lubricating oils for the internal combustion engine, Hiram Lew Wallace

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Immunologic significance of vitamins, Chester Hamlin Werkman

Theses/Dissertations from 1922

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The effect of gypsum on Iowa soils, Lewis Wilson Erdman

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Studies in the growth and nutrition of dairy calves , Andrew C. McCandlish

Theses/Dissertations from 1920

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The effect of gypsum on bacterial activities in soils , Thakur Mahadeo Singh

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Soil acidity and bacterial activityEffect of organic matter upon soil reaction II, Roscoe Elmo Stephenson

Theses/Dissertations from 1917

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Soil inoculation with azotobacter, Paul Emerson

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The degree of sexual activity of male rabbits as affecting the seminal discharge and the nature of the offspring, Frank Alfred Hays

Theses/Dissertations from 1916

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Studies on the phenoldisulphonic acid method for determining nitrates in soils , Charles Wesley Davis

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Environmental influences on nectar secretion, Leslie Alva Kenoyer

Theses/Dissertations from 1915

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Method of finding for distribution and further development a good type of corn for Clinton County, Iowa, conditions, M. L. (Martin Luther) Mosher

Theses/Dissertations from 1910

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Relation between live stock farming and the fertility of the land, Henry A. Wallace