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The Effect Of Carbon Dioxide On The Yield, Phosphorus And Calcium Contents Of Wheat, F. B. Smith, P. E. Brown, H. C. Millar

Proceedings of the Iowa Academy of Science

The concentration of carbon dioxide in the atmosphere is normally about 0.03 per cent but the soil atmosphere usually contains considerably more than this amount especially in the vicinity of roots of rapidly growing plants. The carbon dioxide produced by the plant roots and by microbiological action diffuses from the soil and increases the concentration of carbon dioxide in the atmosphere immediately surrounding the above-ground portions of the plant. It is this carbon dioxide from the soil which the plant utilizes in its growth and hence the significance of an adequate supply is at once apparent. The influence of carbon …

The Phenomenon Of Increased Bone Conduction, Noble H. Kelley

Proceedings of the Iowa Academy of Science

Previous experimentation has indicated that under the following two conditions one's sensitivity for bone conducted sound is increased: (1) closure of the external auditory meatus; and (2) filling the meatus with water. There has been much discussion as to whether this "increased" sensitivity is apparent or real.

Iowa Earthquake Recordings During The Last Year, Mrs. M. M. Seeburger

Proceedings of the Iowa Academy of Science

Brief notes concerning 27 earthquakes recorded at the Des Moines Seismological Station during 1936. Also a brief description of the new photographic recorders recently installed which will greatly increase the sensitivity of the Des Moines instruments.

N-Octadecylamine And Di-N-Octadecylamine And Their Derivatives, William Harber, Henry Gilman

Proceedings of the Iowa Academy of Science

n-Octadecylamine and di-n-octadecylamine have been prepared by various methods, and particularly by both the wet and the catalytic reduction of stearonitrile. The report includes a study of new derivatives (some useful for purposes of characterization), and rearrangement reactions.

Wetting Of Hot Metal Filaments By Molten Metals, M. Alden Countryman

Proceedings of the Iowa Academy of Science

In making thin films of metal by evaporation it is often convenient to evaporate the metal from an incandescent metal filament. In order that evaporation may take place properly the molten metal being evaporated must wet the incandescent filament. The work previously reported on the wetting of metal filaments by molten metals has been extended to include tantalum as a filament material. This report brings the work up to date. It includes the following metals as filament materials: nickel, platinum, molybdenum, tantalum, and tungsten. The following metals were evaporated from the molten state: aluminum, silver, gold, copper, nickel, chromium, and …

A Study Of Some Of The Modern Natural Color Photographic Processes, P. H. Carr

Proceedings of the Iowa Academy of Science

The following additive processes have been investigated: Agfacolor, Dufaycolor, and Finlay. Conclusions are based largely upon experience obtained in the practical use of the processes. The two subtractive processes investigated were Eastman Wash-Off Relief and Defender Chromatone. Here a systematic attempt has been made to analyze the factors which control the results and to eliminate difficulties by some method of control.

A Study On The Effectiveness Of A Motion Picture On Immediate And Long-Time Retention, C. J. Lapp

Proceedings of the Iowa Academy of Science

During the school year 1935-36 the subject of sound was taught to one group of students by motion picture and to another group by lectures and demonstration. The effectiveness of the two methods has been measured by two objective and one essay examination for immediate learning and by one objective and one essay for long-time retention. The methods are compared.

Intensity Of The Violin Tone As A Function Of Bow Speed, Pressure, And Point Of Application Of The Bow, Arnold M. Small

Proceedings of the Iowa Academy of Science

This is a report of one category of findings arising from a general program of research concerned with tone production on the violin. The development of a mechanical bow has made possible the control of bowing factors so that each factor may be varied independently. In general it has been found that, for a given point of contact, bow speed is the predominant factor in determining the intensity of tone. Variation in the point of contact, relative to the distance from the bridge, results in an increase in intensity as the bridge is approached.

The Pocket Mouse (Perognathus Flavescens): A New Species In Iowa, Emmett B. Polderboer

Proceedings of the Iowa Academy of Science

The pocket mouse, as near as we can determine, has not been reported as occurring within the state. The purpose of this report, therefore, is to give a description of the species Perognathus ftavescens obtained in Black Hawk County, Iowa, during the summer of 1936.

A Study Of The Gonadotropic Potency Of Bird Pituitary (Domestic Turkey), A. J. Stanley, G. M. Riley, E. Witschi

Proceedings of the Iowa Academy of Science

Pituitary glands were collected from domestic turkeys and assayed on immature rats and on non-breeding adult sparrows. Various dosages were given. In the rat 25 milligrams of the dry powdered gland produces a minimal reaction. Smaller amounts gave little or no effect while larger amounts gave greater reactions. Daily injections of 5 to 10 milligrams of the powdered gland cause a striking development of the sex glands of sparrows within two weeks.

College Catalog 1936-1937, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents

College Calendar for the Year 1937-38 ... 5
State Board of Education ... 6
Officers of Administration ... 7
Officers of Instruction ... 8
Department of Directed Observation and Supervision Student Teaching ... 15
Extension Division ... 18
Other Officers and Assistants ... 19
Faculty Committees ... 23
General Information
Historical Sketch ... 26
Buildings and Grounds ... 26
Enrollment and Registration ... 30
Fees ... 31
The College Dormitories ... 32
The Commons ... 34
Accredited Rooming Houses ... 34
Employment of Students ... 34
Student Loan Fund ... 35
Student Organizations ... 35
Control of …

An Item Analysis Of The Adjustment Questionnaire, Emma Mccloy Layman

Proceedings of the Iowa Academy of Science

Following a preliminary analysis of 782 personality test items, a questionnaire of 97 items of the yes-no type was administered to a group of 276 freshman men. A statistical analysis of the results was made, and the list was reduced to 67 items. Tetrachoric correlation coefficients were computed between these 67 items and these were submitted to a factor analysis, using Thurstone's technique. It was found that at least 12 factors are necessary to account for the intercorrelations between the items. Of the 67 items, 38 were found to be sufficiently pure that they had factor loadings greater than.50 for …

The Comparison Between Electrodermal Response And Hedonic Tone, Clifford E. Jurgensen

Proceedings of the Iowa Academy of Science

The impressive method of single exposure has long been used to study feeling tone. The expressive method of electrodermal response is similarly used. If both of these methods are valid for the above purpose when used alone, there should be agreement between the two when used together. Essentially the purpose of this study is to determine the degree of relationship between these two methods of study.

Some Methods Of Teaching Taxonomy, H. E. Jaques

Proceedings of the Iowa Academy of Science

When viewed from the aspect of its relationship to other biological fields of either a pure or applied science nature or when taken only as associated with an avocational program, an understanding of the problems of classification of plants and animals is highly essential. Specialists in other fields of biology need not be expert taxonomists but the ability to readily handle some simple classification problems is very desirable and may spare one some awkward embarrassments. Collecting and classifying some group of nature's highly interesting creations appeals so strongly to many that some instruction in handling classification keys may well be …

Officers, Committees, And Past Presidents, Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.

The Vegetative Growth Phases Of Apple Shoots And Their Relation To Root Formation, V. T. Stoutemyer

Proceedings of the Iowa Academy of Science

Distinctly different growth phases in apple occurred during the course of development from seed to tree. The juvenile condition was recognized by the thinner leaves with much less pubescence. Anthocyanin production was more abundant in juvenile shoots. In some species of apple, the shape of the leaf changed from an entire to a lobed form with the approach of maturity.

The Effect Of Training Upon The Handedness Preference Of The Rat In An Eating Activity, Robert L. Milisen

Proceedings of the Iowa Academy of Science

The problem of sidedness has become important in the last few years due to the relationship which may exist between it and certain disabilities such as stuttering, reading and spelling. Although much work has been done with sidedness of human subjects, many factors could not be studied or controlled; therefore, rats were used in this study.

The Stability And Adaption Of The Human Brain Rhythm, B. K. Bagchi

Proceedings of the Iowa Academy of Science

The purpose of this study was to investigate to what degree experimental situations involving repeated or continuous performance of tasks affected the potential rhythm of the brain.

A History Of Religious Activities At Iowa State Teachers College, Marshall Rust Beard

History of Education Book Gallery

Religious activities have always held a permanently place in the lives of students at Iowa State Teachers College.

The fact that from 1885 to 1954, 154 of her graduates are known to have entered full-time religious work as ministers, missionaries, etc., points with some significance to the Christian influence existing on this campus.

Title Page - Front Matter

Proceedings of the Iowa Academy of Science

No abstract provided.

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

In Memoriam: Ernest Otto Dieterich; Julia Trueman Colpitts; Lucy M. Cavanagh; Harry Mccormick Kelly; James Newton Pearce; Albert B. Reagan; Bohumil Shimek, K. J. Miller, Edward S. Allen, Clark D. Paris, Robert B. Wylie, L. Chas. Raiford

Proceedings of the Iowa Academy of Science

No abstract provided.

A Provisionary List Of The Cruciferae Of Henry, Jefferson And Van Buren Counties, Iowa, Charles Gilly

Proceedings of the Iowa Academy of Science

Since the afternoon of April 28, 1933, which I spent in collecting plants along the banks of Copperas Creek in Van Buren County, Malcolm McDonald and myself -working under the direction of Professor Charles Carter - have been doing the foundation work preparatory to the publication of a Flora of Southeastern Iowa. In the course of this work we have built up a herbarium, of more than three thousand specimens, which is now preserved in the Biology Department of Parsons College. In addition to this field collecting and identification, we have consulted already published lists and examined specimens from other …

The Effect Of Replacing Bases With Hydrogen On Microbiological Action In Soils, J. R. Johnston, F. B. Smith, P. E. Brown

Proceedings of the Iowa Academy of Science

The activities of microorganisms in the soil are affected by a large number of factors and one of the principal ones is the hydrogen ion concentration of the soil. The decomposition of organic matter may take place at a low pH as well as at a high pH; however, the type of organisms responsible for decomposition varies at different pH values and the rate and character of the decomposition may also change considerably.

Funaria Flavicans Michx. In Iowa, Clark D. Paris

Proceedings of the Iowa Academy of Science

On May 18, 1935, the writer collected some mosses in the vicinity of the U. S. Fish Hatchery, southeast of Manchester, Iowa. When the late Miss Lucy M. Cavanagh identified these, she found that there was a collection of Funaria ftavicans Michx., which heretofore has not been reported from this state. Miss Cavanagh had planned to report this moss at last year's meeting but her illness prevented it. This particular species was found growing on the ground in a cleared sheep pasture east of the Fish Hatchery. Part of this collection is in the Herbarium of the State University of …

Fruit Hypertrophy Following Haustorial Invasions By Cuscuta, H. L. Dean

Proceedings of the Iowa Academy of Science

Gall formation on numerous host plants following attack by Cuscuta has been reported previously by the writer. The present note calls attention to the hypertrophy of the developing pods of garden peas, and the behavior of certain other fruits, following haustorial invasion by Cuscuta.

Notes On Seed Production In The Smooth Perennial Sow Thistle, Ada Hayden

Proceedings of the Iowa Academy of Science

Sonchus arvensis var. glabrescens Wimm. and Graeb. is at present sparsely distributed in Iowa. The patches are often miles apart. In a number of isolated colonies observed in Clay, Palo Alto, Osceola, Dickinson, Story and Hamilton counties seeds are seldom or never found from July to September. Some tests made relative to the fruiting habits of the Smooth Sow Thistle produced the following results. Self or close pollinated flowers from the same head or from heads in the same colony produced no fruits ("seeds"). Flowers cross-pollinated by brushing with flowers from a distant colony produced almost as many seeds as …

Variations In The Compositon Of Steffens Waste Ii, Edward Bartow, George H. Coleman, H. E. Redman

Proceedings of the Iowa Academy of Science

Steffens waste is the filtrate from the precipitation of sugar from beet molasses by the addition of lime. The molasses, as it comes from the beet sugar extraction process, contains about 50 per cent sugar, so it is too valuable to be fermented to produce alcohol in this country, although in Europe, much of the beet molasses goes directly to production of alcohol by fermentation.

Growth, Reproduction, And Blood Changes Produced In Rats By Means Of Zinc Carbonate, W. R. Sutton, Victor E. Nelson

Proceedings of the Iowa Academy of Science

The literature bearing on the toxicity of zinc to the animal body is very confused. D'Amore, Falcone, and Marmaldi (1) fed zinc oxide to dogs; they called attention to the loss of appetite and the weak condition of their animals with the further observation that the blood color and the number of red cells were greatly diminished. During the last days of the poisoning, the white cells markedly increased. Urine of the dogs was diminished in volume and contained casts and albumin. Lehmann (2) fed zinc carbonate to dogs for eleven months with no evidence of poisoning. Batchelor, Fehnel, Thompson, …

Formation Of Heterocyclic Compounds From Haloamines, George H. Coleman, Gilbert E. Goheen

Proceedings of the Iowa Academy of Science

N-chloro-N-methyl-n-butylamine has been prepared and found to be a relatively stable substance. Ring closure was effected by heating this compound with concentrated sulfuric acid, N-methylpyrrolidine being formed in 45 per cent yields.