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1935 Old Gold, Iowa State Teachers College

UNI Yearbooks

The student yearbook of the Iowa State Teachers College, later known as the University of Northern Iowa.

Proceedings Of The Forty-Ninth Annual Meeting Of The Iowa Academy Of Science, Held At Grinnell, April 19 And 20, 1935: Minutes Of The 1935 Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

The Scattering Of Potassium Ions In Mercury Vapor, Arthur Rouse

Proceedings of the Iowa Academy of Science

An apparatus has been designed to measure the angular distribution loss of potassium ions scattered in mercury vapor. The range of accelerating voltages was from 20 to 300 volts, and the range of scattering angles was from 60° to 150°. Preliminary curves have been obtained showing the angular distribution and energy loss. A comparison has been made with the theoretical curves of Massey, Mott, and Mohr. The results show what points must be more completely investigated.

X-Ray Ionization Chamber Materials, J. Norvel Sayler

Proceedings of the Iowa Academy of Science

An attempt has been made to reduce leakage and troublesome current fluctuations in ionization chambers due to α-particle emission from materials of which chambers are made. Work of Bearden (Johns Hopkins), 1932, has been checked in good agreement, with one exception. Counts of α-particle emission have been made for steel, electroplated copper, aluminum, tin, brass, and glass, after Bearden, and in addition for platinum, molybdenum, electroplated nickel, and electroplated chromium. Best results were obtained from cold rolled steel. In all cases the materials were cleaned with abrasives, and CH₃Br was used as ionizing gas. A "cage" type ionization …

An Investigation Of The Formation And Excitation Of The Mercury Hydride Molecule Through Resonance Radiation, Leonard O. Olsen

Proceedings of the Iowa Academy of Science

A weak excitation by collisions of several of the HgH bands belonging to the electronic system ²π → ²Σ was detected. It was found that HgH was formed in the ²π_½ and ²π_3/2 (excited) states through a collision process involving Hg 6³P and the H₂ molecule, one Hg 6³P atom dissociating the H₂ molecule and a second Hg 6³ atom uniting with an H atom to form the excited HgH molecule.

The Zernike And Prins Method Of Computing X-Ray Diffraction Intensities In Liquids, Donald O. Holland, G. W. Stewart

Proceedings of the Iowa Academy of Science

A study has been made of the nature of the approximation in the Zernike and Prins formula by using it with an ideal simple cubic crystal. The computations show the following.

New Apparatus For The Measurement Of The Electro Dermal Response, D. U. Greenwald

Proceedings of the Iowa Academy of Science

An analysis of the literature on apparatus used to measure electro dermal responses shows that about ten characteristics have been considered important by the majority of investigators.

Diagnosing The Phosphorus Needs Of Soils By Biological Methods, F. B. Smith, P. E. Brown, H. C. Millar

Proceedings of the Iowa Academy of Science

It is a well-known fact that the total phosphorus content of a soil is not a measure of the amount of available phosphorous. Some soils that contain a low total phosphorus content may be supplied with sufficient available phosphorus for present crop needs. On the other hand, some soils that contain a relatively high total phosphorus content may be deficient in available phosphorus.

Effect Of Induced Manual Handicaps On Motor Performance Of A Complex Nature, Laverne Johnson, A. R. Lauer

Proceedings of the Iowa Academy of Science

The question of how much one's ability to drive an automobile would be affected by the loss of an arm has been experimentally studied, under laboratory conditions, and statistically calculated. Comparison is made between manipulative ability, errors, stop signs and other stimuli missed, etc., as well as driving speed using right, left and both hands respectively.

A Bibliography On The Use Of Photoelectric Cells In Plant Investigations, F. M. Turrell, Louis Waldbauer

Proceedings of the Iowa Academy of Science

The recent appearance of the "sperrschicht" type of photoelectric cell has made possible the improvement of several old instruments and the development of new ones. These have included colorimeters, nephelometers, titration meters, pH meters, counters, illuminometers, spectrophotometers, reflection meters and area meters. Much of the work has been published since 1931 and is distributed widely in journals in the special fields of botany, chemistry, physics, engineering, medicine, etc. The authors have compiled the following bibliography with the hope of bringing together these recent developments in a form usable to plant physiologists and others interested in colorimetric, turbidimetric and various light …

Simple Lecture Experiments In A Course On Modern Physics, John A. Eldridge

Proceedings of the Iowa Academy of Science

It is maintained that illustrative experiments are as necessary in introductory courses in modern physics as in the elementary general course. These experiments need not be elaborate. Experiments given at the University of Iowa are described.

On The Effectiveness Of Lecture Demonstrations, C. J. Lapp

Proceedings of the Iowa Academy of Science

A long series of experiments have been performed in an attempt to learn the effectiveness of lecture demonstration experiments. Large groups of students have been used whose physics intelligence coefficients were known. Part of the group has been used to hear the lecture while the rest were writing an examination over laboratory work in another part of the building. The results are very disquieting for those who have deep faith in the lecture method.

Mean Free Paths Of Gas Molecules In Mercury Vapor, John A. Eldridge

Proceedings of the Iowa Academy of Science

The mean free paths have been obtained for hydrogen, helium, nitrogen, carbon dioxide, methane, ethane, propane, butane and isobutane through mercury vapor. The decrease in intensity is observed as a beam of the gas passes through the vapor, any deviation as great as a half degree removing the molecules from the beam. The free paths measured in this way are, as is expected, several times smaller than the values determined from viscosity data.

Photocells For Laboratory Use, L. E. Pinney

Proceedings of the Iowa Academy of Science

Cells having various types of composite coatings have been prepared. Particular attention has been given to better insulation and greater stability than is found in commercial cells.

A Physical Apparatus For The Determination Of The Circulation Time Of The Blood In Dogs, E. C. Mccracken

Proceedings of the Iowa Academy of Science

A radical departure from previous apparatus for the determination of blood circulation time is described in detail. The ensemble consists of an ionization chamber (Geiger Counter), a high-voltage (to 2500 volts) power supply, a three-stage amplifying system, and an output circuit for recording the discharges which occur when radiations enter the chamber. A separate electrical circuit is utilized to measure the time interval between the injection of the radioactive material (radium C) in the jugular vein of the dog and its arrival in that part of the femoral artery lying in the adductor canal. The technique of separating radium C …

Some Laboratory Experiments That Can Be Better Performed In The Library, C. J. Lapp

Proceedings of the Iowa Academy of Science

Using matched groups of students, experiments have been performed on the relative learning over specific skills in physics of groups working in a library vs. a similar group working in the laboratory. Several distinct cases stand out in which the library method appears to be the more effective.

College Catalog 1934-1935, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents

College Calendar for the Year 1935-36 ... 5
State Board of Education ... 6
Officers of Administration ... 7
Officers of Instruction .... ... 8
Other Officers and Assistants ... 16
Faculty Committees ... 19
General Information
Historical Sketch ... 22
Buildings and Grounds ... 22
Enrollment and Registration ... 25
Fees ... 25
The College Dormitories ... 27
Accredited Rooming Houses ... 27
Employment of Students ... 28
Student Organizations ... 28
Control of Extra-Curricular Activities ... 29
Placement Bureau ... 29
General Regulations
Entrance Requirements ... 31
Admission with Advanced Standing ... 32
Advisers and …

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

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: Wesley Greene; Clyde E. Ehinger; Joseph Edward Guthrie, A. T. Erwin, Frank C. Pellett

Proceedings of the Iowa Academy of Science

No abstract provided.

Effect Of Fluorides On Some Organic Constituents Of Blood And Physical Measurements Of Bone, D. A. Greenwood, C. A. Kempf, V. E. Nelson

Proceedings of the Iowa Academy of Science

The effects of excessive amounts of fluorine on the animal organism have attracted the attention of a large number of investigators recently. This interest in fluorine is associated with the fact that mottled enamel has been correlated with the presence of excessive amounts of fluorides in drinking water and, furthermore, by the fact that certain phosphatic mineral supplements are known to contain fluorine. The authors have been interested in the fluorine problem, since the discovery by Ostrem, Nelson, Greenwood, and Wilhelm (1) of mottled enamel in Iowa, due to the presence of excessive fluorides in the drinking waters in certain …

The Influence Of The French Revolution On Mathematics, Helen F. Smith

Proceedings of the Iowa Academy of Science

A study of the early volumes of the Journal de L'École Polytechnique for the light they throw upon the relationship between the history of the times and the rapid development of French mathematics.

The Circulation Time Of The Blood In Dogs Before And During The Digestion Of Food, E. C. Mccracken

Proceedings of the Iowa Academy of Science

The circulation time of the blood in dogs was investigated by an ensemble of physical apparatus consisting of an ionization chamber, a high-voltage power supply, a three-stage amplifying system, and an output circuit for recording and timing discharges which occur in the ionization chamber when radiations such as gamma and beta rays enter.

The Effects Of Some Physical And Chemical Factors In The Circulation Time Of The Blood In Dogs, E. C. Mccracken

Proceedings of the Iowa Academy of Science

After the determination of an average circulation time of the blood between the jugular vein and the femoral artery in a dog, the effect of such factors as exercise, fasting, high-temperature and low-temperature environments, ether and sodium amytal anesthesias; the intravenous injection of such drugs as histamine, nicotine, adrenalin, cobefrin, thyroxin, pituitrin, pitressin, and pitocin was studied.

An Inexpensive Direct Current Amplifier, R. D. Huntoon

Proceedings of the Iowa Academy of Science

In an attempt to increase the stable sensitivity of the direct current amplifier designed by Voorhis, it developed that the commercial tube, type 2A6, is particularly suited to such work. A single 2A6 in a circuit similar to that of Sallu gave a sensitivity of 3xl0^-3 amps/mm. with a galvanometer of sensitivity, 10^-8 amps/mm. An arrangement with a portable microammeter and an a.c. power supply resulted in a useful portable high impedance galvanometer with a sensitivity of 10^-11 amps/mm. The circuit is discussed and methods of balancing explained. It is shown that adjustments are not critical and …

A Further Study Of Color Discrimination Of Color-Blind Subjects, A. A. Benedict

Proceedings of the Iowa Academy of Science

Thirty-two markedly color-blind subjects were given the Ishihara, Holmgren, and Nagel tests of color vision. In addition, each was given a test series of forty-two pairs of spectral colors at equal and known relatively unequal intensities by means of a spectrometer and spectrophotometer.

The Liquid Crystalline And Isotropic States With Special Reference To Para Azoxyanisol, G. W. Stewart, H. R. Letner

Proceedings of the Iowa Academy of Science

Two proposals are: 1. The liquid crystal of para azoxyanisol consists of molecules lying parallel. It is strongly optically anisotropic. The transparent liquid is optically isotropic and the molecules, if there is structure, are arranged so that the molecular anisotropy cancels. 2. The nature of the liquid crystal is as just stated. The transparent liquid consists of cybotactic groups with indefinite boundaries with regularity marked within say 30 Å.u. diameter and with irregularity between the regularities. The liquid crystal probably consists of approximate like orientation of these minor groups in a group large enough to show optical anisotropy. The experiments …

The Limitations Of Present Computative Methods Of Studying Liquid Structure, George A. Boyd

Proceedings of the Iowa Academy of Science

The inadequacy of the approximate method of x-ray diffraction intensity computation in the case of liquids is illustrated by computations relative to n-paraffins. Warren apparently proved, by using Zernike and Prins theory, that the structure of the liquids is hexagonal parallel packing. These computations have been repeated and extended to larger scattering angles. Similar calculations were made for the parallel packing. Conclusive proof for either array was not found. Preference, however, due to peak position, should be given to the former. The work emphasizes the need for a better theoretical approach to the problem of liquid structure in explaining the …

An Unusual Appearance Of The Cyanogen Bands, Leonard O. Olsen

Proceedings of the Iowa Academy of Science

A unique formation and excitation of the CN molecule occurred in the resonance tube. (Observed in connection with the investigation of the mercury hydride molecule.) The bands which were noted belong to the ²Σ → ²Σ electronic system. The excitation has been determined to be due to collisions of the CN molecule with excited mercury atoms in the 6³P state.

Operating Characteristics Of Vapor-Type Vacuum Pumps, L. E. Pinney

Proceedings of the Iowa Academy of Science

Pumps using mercury, n-butyl phthalate, and Apiezon oil have been tested for effectiveness against various fore pressures. Special designs have been worked out for use with Apiezon oil.