Digital Commons Network^™

Dyes Containing Long-Chained Aliphatic Radicals, Fred W. Hoyt, H. Gilman

Proceedings of the Iowa Academy of Science

The investigation of the synthesis and properties of compounds containing long-chained aliphatic radicals has been extended to the preparation of several azo dyes, coupling products of ß-naphthol with the appropriately substituted aromatic diazonium chlorides. The dyes prepared include those from a series of three p-alkoxyanilines, ROC₆H₄NH₂, where R is n-C₁₂H₂₅-, n-C₁₄H₂₉-, and n-C₁₆H₃₃-, all deep red in color; and two brighter red compounds from p-( N-alkylsulfonamido )-anilines, H₂ NC₆H₄S0₂NHR, where R is n-C₁₂H …

Iodination Of Anisole, Ralph Holch, J.B. Culbertson

Proceedings of the Iowa Academy of Science

As a rule direct iodinations do not proceed readily, often explained as due to the unfavorable equilibrium attained with the reverse reaction of hydrogen iodide upon the iodo-compound. Iodine is more commonly introduced into an aromatic nucleus through the Sandmeyer reaction by the addition of potassium iodide to a diazotized primary aromatic amine. Thus p-iodoanisole has been prepared from p-anisidine.¹ A procedure of direct iodination for the preparation of iodoaromatic compounds would appear to offer important advantages. In 1901, Brenans² reported such a process in the preparation of p-iodoanisole through the interaction of an absolute ethyl alcohol solution …

An Apparatus For Measuring Tolerance To Light And Visual Efficiency Under Different Conditions Of Illumination, Glenn O. Martinson

Proceedings of the Iowa Academy of Science

Illumination in relation to automobile driving is considered one of the most important problems of highway safety. Because of contrast between source of light and background, lights which give sufficient illumination are considered blinding. An apparatus is described which makes possible the accurate measurement of tolerance to light under different atmospheric conditions. Calibration of the light falling on the test object and the light impinging on the retina makes possible measurement of the optimal conditions of illumination under different degrees of darkness. The light measurements are made by electrometric methods.

Experimental Evidence On Thorndike's Law Of Repetition And Corollaries Frequency And Receny, Morgan Harrison, Earle E. Emme

Proceedings of the Iowa Academy of Science

I. Purpose of experiment: To discover whether Thorndike's laws of repetition, frequency, and recency are valid. 2. Method and procedure (1) 55 college students were subjects, with sophomores in in predominance. (2) Percentile rank on intelligence of these students was secured. (3) A maze consisting of 99 bolt heads was used. Two separate circuits, a white light for the desirable path, and the red the undesirable. (4) Trial and error method. Each subject attempted to discover the desirable path with the least number of errors in five trials. 3. Findings (1) The medium number of errors was 81. (2) The …

The Removal Of Flourides From Water By Ionic Exchange, R. E. Benson, D. L. Porth, O.R. Sweeney

Proceedings of the Iowa Academy of Science

Mottled enamel is the term originated by McKay to describe the disfigurement of teeth which Smith and others discovered was caused by the presence of fluorides in drinking water. Since then considerable time, energy and money have been spent in an effort to find an economical method of removing fluorides from drinking water. At first the use of activated carbon and activated alumina were rather promising; but more recently the use of tricalcium phosphate to remove fluorides from water has been developed (2). A patent by Adams and Holmes (1), wherein it was claimed that the sulphate ion concentration could …

A Preliminary Report On The Use Of Parasitic Nematodes Of The Earthworm For Class Study And Cytological Research, Norman M. Sulkin

Proceedings of the Iowa Academy of Science

A preliminary investigation shows the nematode parasites of the earthworm to be excellent material for cytological and embryological research, in addition to being useful as material for class room study. Their neglected study has probably been due to lack of suitable culture methods. It has been found that the nematodes will live on a 2% agar plate upon which small bits of red beef are placed. For optimum prolificity, the temperature should be kept constant at 15° C. With the use of this method, the author has kept a rapid growing culture alive for the past six months. The ova …

A Chimeric Tulip, Karl A. Stiles

Proceedings of the Iowa Academy of Science

An unusual yellow Cottage tulip which was collected by Norman Stookey in the spring of 1934 was given to the author. All the petals of this tulip were yellow except one which was one-half yellow and one-half red. Inasmuch as the bulb from which this tulip developed has not produced another such chimeric flower it appears probable that it is due to a somatic mutation or a somatic non-disjunction of the chromosomes.

Melt-Water Volume Of Iowa's Last Ice-Sheet, Charles Keyes

Proceedings of the Iowa Academy of Science

The old-fashioned notion of a gargantuan ice-cap, so huge as to occupy half of the earth's hemisphere and miles in thickness, was as we now well know, not a creation of the geologist but of the zoologist, a fancy drawn upon to support the theological idea of special creation of life on the globe. It was zoologist Agassiz's last stand against the rapidly growing Darwinian revolution through evolution. Lately, this all but forgotten concept has been revived to explain submarine terraces, 50 to 300 feet below sea-level, the continental shelf at 600 feet and even deep-sea plains trenched by canyons …

Vitamins In Plants, Norman Ashwell Clark

Proceedings of the Iowa Academy of Science

The particular part of this rather broad subject to which I want to call your attention this afternoon, concerns the synthesis of vitamins in plants, and some factors which influence their production. I shall illustrate from a number of experiments, including those which we have carried out at Iowa State College on the formation of vitamins A, B₁ and C. Although some vitamins, for example A and D, may be manufactured in the animal body, the ultimate source of most of the vitamins is the plant kingdom. Animals get their vitamins either directly from plants, or indirectly by varying …

Photoperiodic And Light Intensity Effects On External Structures Of Certain Members Of The Solanaceae, Mildred Nelson

Proceedings of the Iowa Academy of Science

Plants grown (Capsicum frutescens, Salvia splendens, Lycopersicon pimpinellifolium, Lycopersicon esculentum) show some striking differences when compared with control plants grown under normal conditions. Some of these differences are: 1. Amount of vegetative foliage produced. 2. Size of vegetative shoots. 3. Rate of growth of vegetative shoots. 4. Thickness of stem. 5. Length of stem between nodes. 6. Date of flowering. 7. Number of flowers. 8. Number of flowers which absciss before maturing. 9. General growth habits of the structures under the different conditions.

Temperature Changes Accompanying The Adiabatic Extension And Compression Of Metals, Grant O. Gale

Proceedings of the Iowa Academy of Science

The metals in the form of vertical wires are extended and compressed by the addition and removal of a load within the elastic limit. The temperature change is a transient effect, the magnitude of which was originally worked out by Lord Kelvin to be ϑ = tep/Jk_Q where ϑ=temperature change, p =stress, t=temperature (Kelvin,) e = linear coefficient of expansion, J =mechanical equivalent of heat, k =specific heat (C_p), ϱ=density. A modified Carey Foster resistance bridge is used, comparing the resistance of the wire with a standard. Since the effect is of short duration, the wire is …

In Memoriam: Robert Irwin Cratty; John James Bushnell; Edward Jacob Petry; Winifred Gilbert; Ross W. Harris; Edward K. Putnam; Mary Louise Sawyer, Ada Hayden, T. C. Stephens, Mrs. Edward J. Petry, Roy L. Abbott, William H. Pfeffer, U. A. Hauber, H. S. Conrad

Proceedings of the Iowa Academy of Science

No abstract provided.

The Effect Of Gelatin On The Solubility Of Hydrogen At 25° C, W. G. Eversole, Allen L. Hanson

Proceedings of the Iowa Academy of Science

The solubility of hydrogen in water and in dilute gelatin solutions has been measured by noting the change in volume of the hydrogen when placed in contact with the gas-free solvent. The latter was freed of all dissolved gases by prolonged boiling under reduced pressure. This solvent (water or gelatin sol), was then sealed hermetically in a glass bulb and transferred to the main apparatus. Hydrogen was prepared electrolytically and purified by passing over platinized asbestos at about 250°C. It was saturated with water vapor and introduced over mercury into a gas burette. By displacement with weighed portions of mercury, …

A Study Of Preserved Blood Specimens Taken For Alcohol Determination, T. U. Marron, James J. Hilbe

Proceedings of the Iowa Academy of Science

From the beginning of our experience with blood alcohol determinations for evidence in legal cases we have been called upon for information concerning the change of alcohol content in blood specimens after they have been drawn. Samples usually come to this laboratory in chemically clean glass vials stoppered with new corks and containing sufficient dry potassium oxalate to prevent clotting. These containers are obtained ready for use from this laboratory by county officials. However, many blood samples received have been contained otherwise, and often the temperature treatment of the specimens has not been uniform. To have available information about the …

The Effect Of Various Growth-Promoting Substances On The Reproduction Of Lemna, Norman Ashwell Clark, Elmer E. Frahm

Proceedings of the Iowa Academy of Science

About 20 years ago, Bottomley (3), at the University of London, failed to secure normal growth of Lemna and other plants in inorganic salt solutions without the addition of organic matter. He concluded that special compounds, similar to vitamins for animals, were required by plants. These unknown substances were termed auximones. Mockeridge (20, 21) using solutions identical with those employed by Bottomley, found that a decided stimulation of the rate of reproduction of Lemna was produced by various nucleic acid derivatives isolated from soil and manure. Azotobacter and yeast were also found to contain accessories for plant growth, and the …

Behavior Of Some P-Hydroxybenzaldehyde Derivatives Toward Oxidizing Agents, R. P. Perry, L. Charles Raiford

Proceedings of the Iowa Academy of Science

Benzaldehyde¹ and its alkyl, alkoxy and halogen substitution products are readily oxidized to the corresponding acids. Contact with air often brings about the change.² Biicking,³ and Fittig and Remsen⁴ found that p-hydroxybenzaldehyde and protocatechuic aldehyde, respectively, are not readily oxidized by potassium permanganate solution. Tiemann⁵ could not oxidize vanillin, the 3-methyl ether of protocatechuic aldehyde, into vanillin acid by the usual methods, and Brady and Dunn⁶ failed to oxidize 5- bromovanillin with acetic acid solution of chromic acid and also by alkaline solution of potassium permanganate. The behavior of many vanillin substitution products^{7 …}

A Study Of Compensation, Miriam G. Zugmeier, A. R. Lauer

Proceedings of the Iowa Academy of Science

Although pages have been written in psychological text books on compensation, a survey of the literature shows an extremely meagre amount of experimental data. The present study is an attempt to formulate some of the problems of compensation into experimental form. Forty subjects were given a series of laboratory tests in which accuracy and speed were compared under normal conditions and under conditions of distraction. Thirty-one of the same subjects were given a written test of the questionnaire type which was divided into three arbitrary categories; traffic compensation (T), social compensation (S), and industry or ambition (I). The following correlations …

Food Habits Of The Western Painted Turtle, Chrysemys Marginata Bellii Gray, Emery G. Fritsch

Proceedings of the Iowa Academy of Science

This investigation summarizes an attempt to obtain conclusive evidence as to food habits of one of our very common turtles, Chrysemys marginata bellii (Gray). In the literature of the food habits of turtles little data is recorded in regard to Chrysemys marginata bellii, although there is much scattered information concerning other species of this genus. The food habits of many of our turtles on the other hand have been briefly reveiwed by Ditmars (1), Babcock (2), Morgan (3), Ruthven (4), and Surface (5). Surface has studied the food habits of several species of turtles and his data seem to be …

Histological Observations On The Epiphysis Cerebri And On The Chorioid Plexus Of The Third Ventricle Of The Dog, W. G. Venzke, J. W. Gilmore

Proceedings of the Iowa Academy of Science

The epiphysis cerebri has long been a subject of considerable interest and until only very recent time has its histological components been elucidated in several species. The physiological role of the epiphysis in the body has not yet been worked out. From time to time the histological as well as the physiological conceptions regarding this organ have changed. Galena (8) first regarded this organ as a gland. Later Descartes (6) regarded the epiphysis as the seat of the soul. These suggestions have been followed by others which consider the epiphysis as an organ with a purely mechanical role concerned with …

The Resonance In The B-P-A Reaction, W. B. Mclean, V. J. Young, W. L. Whitson, G. J. Plain, A. Ellett

Proceedings of the Iowa Academy of Science

The yield of alpha particles of range greater than 2 cms. from boron bombarded by protons has been studied as a function of bombarding energy in the range from 100 to 200 ekv, using a thin target, either methyl borate or boron trifluoride at pressures of 1 mm. of Hg. The yield vs. energy curve shows an approximately exponential rise on which is superposed a sharp (half breadth ~ 6 ekv) intense line at 150 ± ekv. There is some indication of a weaker and much broader line at 190 ekv. Number range curves are not yet available, but the …

Frequency And Seriousness Of Disciplinary Problems In Certain Iowa High Schools, Lyle K. Henry, William Dreier

Proceedings of the Iowa Academy of Science

This investigation grew out of a feeling of need on the part of students enrolled in courses in educational psychology. Many students had confidence in their ability to teach subject matter, but they were uncertain as to the behavior problems that might arise and how they could be met. The study sought to obtain from teachers in Iowa high schools information on the following questions. 1. What behavior problems occur most frequently? 2. Which behavior problems do teachers consider to be the most serious? 3. What remedial or corrective measures are employed to meet these problems?

A Comparison In Size Of Pollen Baskets Of Three Races Of Honeybees, J. M. Hitchings

Proceedings of the Iowa Academy of Science

It is generally recognized that the honeybee is of great value to agriculture and related industries where pollination is a factor. Claims are often expressed that the honeybee is from ten to ninety times more valuable to the plant industries as a pollination agent, each season, than the annual monetary value of the honey crop. Beekeepers recognize that some colonies and some races of bees are more industrious than others in collecting honey, but the field of pollination has not been sufficiently investigated to establish which race of bees, if any, is the best pollination agent. The initial interest in …

A Heat Vaporization Experiment For Elementary Laboratory, L. T. Earls

Proceedings of the Iowa Academy of Science

An electric heating coil is used in an ordinary pint vacuum bottle to evaporate water under steady state conditions. The system is used on a platform balance; the heat of vaporization is determined from total energy input and total change of weight. Sources of error are discussed and accuracy obtainable in actual use is indicated.

Preliminary Evaluation Of A Test For Biological Background, Richard Schweet, A. R. Lauer

Proceedings of the Iowa Academy of Science

A test, composed of 140 items, including names of men and terms associated with biology, was given to 65 undergraduate students with various majors and 25 graduate students in zoology. The undergraduates' records were analyzed to ascertain the effect of giving the test, with and without time limits, to comparable groups. On the basis of data obtained, a revision of the test was made using 100 select items. This revision was given to 18 graduate and 33 undergraduate students. Correlation of odd versus even items for the separate groups yielded reliability coefficients of + .90 after correction for length. A …

Index

Proceedings of the Iowa Academy of Science

No abstract provided.

College Catalog 1939-1940, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents:

College Calendar for the Year 1940-41 ... 6
State Boa.rd of Education ... 8
Officers of Administration ... 9
Officers of Instruction ... 10
Department of Directed Observation and Supervised Student Teaching ... 17
Extension Service ... 20
Other Officers and Assistants ... 21
Faculty Committees ... 26
General Information
Historical Sketch ... 29
Buildings and Grounds ... 29
Enrollment and Registration ... 35
Fees ... 36
The Residence of Women Students ... 38
The Residence of Men Students ... 39
The Commons ... 40
Resume of a Student's Expenses Per Year ... 41
Employment ... 41 …

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

Proceedings of the Iowa Academy of Science

No abstract provided.

Proceedings Of The Fifty-Fourth Annual Meeting Of The Iowa Academy Of Science, Held At Mount Vernon, April 19 And 20, 1940: Minutes Of The 1940 Meeting

Proceedings of the Iowa Academy of Science

No abstract provided.

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

Reports: Executive Committee; Secretary; Treasurer; Staff Reports; Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.