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High Molecular Weight, Normal And Branched Aliphatic Compounds, Fred Hoyt, Henry Gilman Jan 1938

High Molecular Weight, Normal And Branched Aliphatic Compounds, Fred Hoyt, Henry Gilman

Proceedings of the Iowa Academy of Science

A series of high molecular weight compounds (hydrocarbons, alcohols, amines, etc.) is being examined for correlations between molecular weight and viscosity. In some of the syntheses (particularly those of hydrocarbons, alcohols and ketones) long-chained aliphatic organometallic compounds have been used. Some of these have been prepared in adequate yields for the first time.

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Ethynylmetallic And Substituted Ethynylmetallic Reactions In Various Solvents, Miles R. Mccorkle, Henry Gilman Jan 1938

Ethynylmetallic And Substituted Ethynylmetallic Reactions In Various Solvents, Miles R. Mccorkle, Henry Gilman

Proceedings of the Iowa Academy of Science

Incidental to a study of the relative reactivities of ethynylmetallic and substituted ethynylmetallic compounds, in various media including liquid ammonia, it has been shown that these organometallic compounds react in a customary manner, not only with RX compounds but also with a large variety of compounds having a functional group. The ethynyl tertiary alcohols formed from ketones lose acetylene on heating and give the original ketone. For example, myristone and ethynylsodium give di-tridecyl-ethynylcarbinol, which when heated gives an almost quantitative yield of myristone and acetylene. In the presence of small amounts of organolead compounds, the ethynylsodium behaves like sodium carbide …

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Sandstone Of Des Moines Age In Fayette Breccia At Robins, Iowa, S. W. Stookey Jan 1938

Sandstone Of Des Moines Age In Fayette Breccia At Robins, Iowa, S. W. Stookey

Proceedings of the Iowa Academy of Science

In examining the rock exposures in a quarry near the village of Robins, Linn County, Iowa, Mr. R. B. Van Cleve reported finding plant remains in Des Moines sandstone associated with rocks of the Wapsipinnicon Stage of the Iowa Lower Devonian. Exposures of a terrane carrying a fauna of Devonian age apparently below the Gyroceras beds of the Cedar Valley have been found in Buchanan County and in well drillings containing species of the same fauna in Linn County. This terrane is known as the Independence and has been regarded as older than the Cedar Valley, although the fauna is …

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Master Drainage During Deglaciation, Charles Keyes Jan 1938

Master Drainage During Deglaciation, Charles Keyes

Proceedings of the Iowa Academy of Science

As occupying the middle of the main lobe of the Ashawa glaciation, the upper Des Moines River held strategic position in one of the strangest drainage recoveries and reversals, during ice-cap retreat, that has ever been recorded. While melting of this Keewatin ice-cap, of the Last Glacial cycle, was going on. the Des Moines River played a curious part. It carried off the major volume of melt-waters for an interval of 300 years, until the ice had melted back to Blue Earth, Minnesota, on the drainage divide between the Des Moines and the Minnesota rivers.

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Stylolites In The Burlington Limestone Near Kinderhook, Illinois, John C. Frye, Ellis H. Scobey Jan 1938

Stylolites In The Burlington Limestone Near Kinderhook, Illinois, John C. Frye, Ellis H. Scobey

Proceedings of the Iowa Academy of Science

Weil developed stylolites showing a peculiar relationship to chert occur in the Burlington limestone north of Kinderhook, Illinois. Specimens were studied by the preparation of insoluble residues of the limestone and "clay cap," and by making thin sections of the chert nodules. Stockdale's conclusion of origin by solution in an indurated rock is ascribed to for the stylolites in question because, (1) crinoid stems are fluted along the sides of prongs the same as the mass of the rock, (2) the suite of minerals occurring in the "clay cap'' represents nearly a true average of the suites of minerals from …

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Heat Of Wetting Of Soils, M. B. Russell, L. A. Richards Jan 1938

Heat Of Wetting Of Soils, M. B. Russell, L. A. Richards

Proceedings of the Iowa Academy of Science

Many important soil processes such as base exchange capacity, plant food availability and moisture holding capacity, are influenced by the amount of surface per unit mass of soil. For this reason, measurements related to this soil characteristic may be used in connection with many soil problems. This article is concerned with the description of a method of measuring the relative surface area of soils with apparatus suited for student use. It consists in measuring the heat energy liberated by a dry soil which is wetted by water at the same temperature.

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Correspondence Of Change Of Structure Of Water With The Change Of Apparent Volumes Of Ions In Solution, G. W. Stewart, James A. Jacobs Jan 1938

Correspondence Of Change Of Structure Of Water With The Change Of Apparent Volumes Of Ions In Solution, G. W. Stewart, James A. Jacobs

Proceedings of the Iowa Academy of Science

Careful measurements were made of the diffraction curves of dilute aqueous solutions of LiCl, NaCl, KCl, NH4Cl, MgCl2, Co (C2H3O2) CoCl2, KClO3, and AICl3. In view of the inadequacy of the free ion theory to explain the nature of the change of apparent volume of ions in solutions, any evidence of any kind of correlation with that change is important. The x-ray diffraction of water was used to determine the magnitude of the alteration of water structure by the presence of ions. It is …

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The Swarm Structure Of The Liquid Crystal, Para-Azoxyanisol, R. C. Davis, G. W. Stewart Jan 1938

The Swarm Structure Of The Liquid Crystal, Para-Azoxyanisol, R. C. Davis, G. W. Stewart

Proceedings of the Iowa Academy of Science

The liquid crystal of para-azoxyanisol has interesting properties. The phase consists of swarms of molecules. In each the molecules are oriented parallel and all of them in a swarm unite in action in response to a magnetic field. The liquid crystal phase at the transition point has a greater density by 0.43 per cent than the isotropic liquid. Experiments have indicated that each swarm consists of about 106 molecules, but with varying size over an indefinite range. There has been a difference of opinion as to whether or not there are considerable spaces between the swarms (Ornstein and Kast, …

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Psycho-Physical Analysis Of The Betts Visual Acuity Test, H. C. Schepler Jan 1938

Psycho-Physical Analysis Of The Betts Visual Acuity Test, H. C. Schepler

Proceedings of the Iowa Academy of Science

Although visual acuity is of chief concern to the optometrist from the professional standpoint, the physicist should be no less concerned from the standpoint of its applications to work in optics and illumination. Visual acuity is indeed difficult to measure and many types of acuity tests have been devised. The Clason acuity meter and the Snellen chart are the accepted standards used by optometrists. Another test for measuring acuity, which is administered on the stereoscope, is one of many visual tests that has been developed by Betts, Director of Teacher Education, State Normal School, Oswego, N. Y., who worked jointly …

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Fundamental Dimensions And Electrical Units, John A. Eldridge Jan 1938

Fundamental Dimensions And Electrical Units, John A. Eldridge

Proceedings of the Iowa Academy of Science

Proposition: What dimensions and how many are fundamental is a matter of choice, custom and convenience, not of logical necessity. Limitation: This does not deal with how many and what fundamental entities are required to build a universe; it is simply a question of mensuration; how many and what independent dimensions shall (must) we use to express physical quantities unambiguously, and to make physical equations balance.

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Several Simple Lecture Experiments, John A. Eldridge Jan 1938

Several Simple Lecture Experiments, John A. Eldridge

Proceedings of the Iowa Academy of Science

A number of simple lecture experiments were demonstrated. These dealt mainly with inexpensive apparatus and had to do in the main with transformer circuits when the secondary was first open and then closed.

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Fine Grain Photographic Development, George C. Higgins Jan 1938

Fine Grain Photographic Development, George C. Higgins

Proceedings of the Iowa Academy of Science

The effect of different fine grain photographic developers upon the effective emulsion speed and grainines of photographic materials was studied quantitively. Fine grain developers were found to be more effective in reducing the graininess of fast coarse grain emulsions than of slow fine grain emulsions. The effective emulsion speed of slow fine grain emulsions when developed in a MQ Borax developer was found to be at least equal to that of a fast coarse grain emulsion when developed in an ultra fine grain developer which gave negatives of as low graininess on the fast emulsion as the .i\IQ Borax gave …

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Parsons College Physics Museum, E. Hobart Collins Jan 1938

Parsons College Physics Museum, E. Hobart Collins

Proceedings of the Iowa Academy of Science

The experimental equipment of the museum which is portable was demonstrated and the other experiments were discussed briefly. It is found that the museum is very effective in popularizing Physics also that it is effective as an additional teaching aid.

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An Experiment In Survey Science, R. W. Getchell Jan 1938

An Experiment In Survey Science, R. W. Getchell

Proceedings of the Iowa Academy of Science

The objectives of higher education are being critically examined these days. In an earlier time culture was the attainment most sought - a culture which was rooted in the classical languages, Greek and Latin. Utilitarian subjects rated but little following. And the sciences such as they were, thrived around the philosophical round table and not in the laboratory. Gradually the ideals of a liberal education have shifted to a new emphasis and with this shift the laboratory sciences are coming into their own. It is now generally recognized that every student who seeks a broad, well balanced college education must …

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Some Factors Affecting Achievement In Physics In A Survey Course In The Physical Sciences, W. H. Kadesch Jan 1938

Some Factors Affecting Achievement In Physics In A Survey Course In The Physical Sciences, W. H. Kadesch

Proceedings of the Iowa Academy of Science

A study was made of the gains in physics achieved by different groups. Those who presented high school credit in physics for college entrance made a greater average gain than those who did not, but a smaller percentage of gain. Those whose intelligence rating was in the upper fifty percentile made a greater gain than those in the lower fifty percentile, but a smaller percentage of gain.

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A Study Of The Learning Effectiveness Of A Sound Motion Picture, Electrodynamics, In College Physics, C. J. Lapp Jan 1938

A Study Of The Learning Effectiveness Of A Sound Motion Picture, Electrodynamics, In College Physics, C. J. Lapp

Proceedings of the Iowa Academy of Science

Many findings have been made concerning motion-picture effectiveness as a teaching technic for school pupils, but little similar work has been done on a college level. The new sound film "Electrodynamics" produced by Erpi Picture Consultants was studied in detail to find: (1) The learning produced by two showings of the film: (2) The effect of an additional stimulus to learning in the form of a study sheet to be used during the class hour when the picture was shown; (3) The variation in the first two effects with class quartiles; (4) The ability to transfer new learning to specific …

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A Suggestion For The Teaching Of Electrical Potential, C. J. Lapp Jan 1938

A Suggestion For The Teaching Of Electrical Potential, C. J. Lapp

Proceedings of the Iowa Academy of Science

Electrical potential is one of the basic concepts in elementary theory. Without a clear understanding of it, electrical theory is difficult. The writer has been experimenting for six years on the presentation of this topic with little success. It was finally decided that the inherent difficulty of the concept was much greater than had been previously thought. This year a new method was tried. It took into account the great inherent difficulty of the concept and produced the best results of any method tried to date. The potential was presented in terms of both the water and the heat analogues.

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An Analysis Of The Implications And Reference Of The Word "Intelligence", C. E. Tuthill Jan 1938

An Analysis Of The Implications And Reference Of The Word "Intelligence", C. E. Tuthill

Proceedings of the Iowa Academy of Science

The meaning of the word "intelligence'' is seen to vary from one context to another. The term "multiordinal" has been applied by Korzybski to refer to words the meaning of which is indicated by the context and depends upon the order of abstraction involved. That the meaning of the word "intelligence" is many-valued or multiordinal may be seen from some of the following quotations taken from the writings of leading men in the field.

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An Objective Experiment With A Clairvoyant (Mind-Readers), E. Emme Jan 1938

An Objective Experiment With A Clairvoyant (Mind-Readers), E. Emme

Proceedings of the Iowa Academy of Science

The assumption is that the clairvoyant (fortune-teller) can guess accurately personality facts concerning an individual. Readings are given in devious ways. The most common forms are crystal gazing. use of cards, use of tea leaves. and sometimes a combination with palmistry. Individuals are usually so curious, or in such an excitable or careless state of mind that reported findings from such persons are very inaccurate. In order to get at an analysis of the whole procedure as objectively as possible a plan was devised.

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Techniques In Studying The Effect Of Self-Support Upon The Grades Of College Students, Dwane R. Collins Jan 1938

Techniques In Studying The Effect Of Self-Support Upon The Grades Of College Students, Dwane R. Collins

Proceedings of the Iowa Academy of Science

Self-support has become a major interest on today's campus, and there are many conflicting opinions regarding its advantages and disadvantages. Regardless of whether it has more advantages than disadvantages or vice versa, self-support is a living problem and must be faced. Hence we must be concerned with its relationships to the many aspects of the life of the student. The disagreements are chiefly concerned with the health, extra-curricular-activity participation, social life, happiness, schedule load, and scholastic standing of the students engaged in self-support. We shall confine our discussion to the relationship of self-support and the academic grades of college students.

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A Preliminary Investigation Of The Validity Of The Emme Home Adjustment Scale, Lyle K. Henry Jan 1938

A Preliminary Investigation Of The Validity Of The Emme Home Adjustment Scale, Lyle K. Henry

Proceedings of the Iowa Academy of Science

There is a great deal of interest at present in personality and adjustment inventories. They are looked upon by educators as a very promising technique both in counseling and in vocational guidance. Probably the present interest in personality tests has been stimulated by the comparatively recent appearance and use of two particular tests, namely the Bernreuter Personality Inventory and the Bell Adjustment Inventory. Each of these tests measures four attributes of the individual and provides weighted scoring of the items. There are several difficulties, however, in regard to the use and interpretation of personality tests. For one thing there is …

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Concerning The Establishment Of A Criterion And Certain Incidental Points Relations To Validity Coefficients, A. R. Lauer Jan 1938

Concerning The Establishment Of A Criterion And Certain Incidental Points Relations To Validity Coefficients, A. R. Lauer

Proceedings of the Iowa Academy of Science

There is a persistent demand for validity coefficients of some sort in the field of applied psychology. The simplest criterion is often chosen. The Binet-Simon test has been validated almost entirely against an academic criterion. This may or may not be justified as there are many who believe that intelligence is more than mere scholastic aptitude. With more recent explorations, by factor analysis and other techniques, this belief has considerable experimental support. We have thus sought for a criterion and too often have been content with that which gives the highest validity coefficients.

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Visual Acuity Measurements With The Betts Test Cards, H. C. Schepler Jan 1938

Visual Acuity Measurements With The Betts Test Cards, H. C. Schepler

Proceedings of the Iowa Academy of Science

Three commonly accepted notations for visual acuity are: (1) the Snellen System, which follows an arithmetic progression, (2) the Clason Decimal System, which bears a constant relationship to the Snellen System, and (3) the Snell and Sterling System, which follows a geometrical progression and is commonly referred to as the system of the American Medical Association. Visual acuity is indeed difficult to measure and many types of acuity tests have been devised. One such test, which is administered on the stereoscope, has been devised by Betts, Director of Teacher Education, State Normal School, Oswego, N. Y., who worked jointly with …

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Interests And Personaloty Traits Of Undergraduate Students In Relation To Their Success Or Failure In The Study Of Psychology, Leigh C. Douglass, Janet Day Jan 1938

Interests And Personaloty Traits Of Undergraduate Students In Relation To Their Success Or Failure In The Study Of Psychology, Leigh C. Douglass, Janet Day

Proceedings of the Iowa Academy of Science

Several different personality inventories and the Strong Vocational Interest Blank were studied, item by item, for evidences of any common patterns of interests or personality traits of students in the highest and lowest thirds of a beginning course in psychology. The aim was to find what personality qualities might be associated with ability to succeed in the elementary study of psychology. Some significant differences were discovered, showing distinct personality qualities of the two groups. In general it was found that the high group is certain of its opinions, is radical, is introvert, is emotionally stable, has intellectual interests, is characterized …

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A Preliminary List Of The Dolichopidae Of Iowa, Bernard G. Berger, H. E. Jaques Jan 1938

A Preliminary List Of The Dolichopidae Of Iowa, Bernard G. Berger, H. E. Jaques

Proceedings of the Iowa Academy of Science

The Dolichopidae are small flies not exceeding eight millimeters in length, and are almost always bright metallic green or blue in color. The adults are found especially ahundant on plants around sand and mud, as well as on rocks and plants in the water. They are predaceous flies living on small, soft bodied insects. The genera Laxina, Condylostylus and Sciapus may be found on leaves of shaded flowers in search of food. These flies may be readily distinguished from the members of other families by the absence of a cross vein between the discal and the second basal cell, these …

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A Preliminary List Of The Tetanoceridae Of Iowa, H. E. Jaques Jan 1938

A Preliminary List Of The Tetanoceridae Of Iowa, H. E. Jaques

Proceedings of the Iowa Academy of Science

The family of Diptera known as Tetanoceridae or Marsh Flies includes medium-sized flies, most species of which may be readily recognized by the shape of the head. It is fully as broad as the thorax, quite short, and has a "retreating chin" which gives a characteristic profile. The adults frequent ponds, streams, marshes, and other moist places. The larvae are aquatic. The family is a small one and but remotely economic. The Iowa Insect Survey has been giving especial attention to this family for several seasons. A total of 21 species are known to occur in Iowa. This number will …

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Progress Report On A Survey Of The Spiders Of Iowa, Karl A. Stiles, Beulah Detwiler Jan 1938

Progress Report On A Survey Of The Spiders Of Iowa, Karl A. Stiles, Beulah Detwiler

Proceedings of the Iowa Academy of Science

The senior author began a study of Iowa spiders in the fall of 1936 when a black widow (Latrodectus mactaus texanus) was collected in Linn County. This was reported in Science (Stiles, 1937) and constituted the first official record of the black widow for Iowa. This record was of special interest because Minnesota and Iowa had been listed as the only states from which this spider had not been reported officially. It was discovered at that time that the spider was one of Iowa's most neglected animals. Only three papers on our spider fauna have been reported to the Iowa …

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A Study Of Copulation And The Formation Of Spermatophores In Melanoplus Differentialis, George Kyl Jan 1938

A Study Of Copulation And The Formation Of Spermatophores In Melanoplus Differentialis, George Kyl

Proceedings of the Iowa Academy of Science

Grasshoppers are one of the most common and most harmful insects known to people in agricultural districts. Because of this they have been carefully studied, and much is known about their habits and devastating ways. However, very little is known regarding the mating habits of these insects. This study of the copulatory habits of Melanoplus differentialis has been made to obtain more accurate information regarding mating in this species.

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Metals, Lillian Adams Nov 1937

Metals, Lillian Adams

Purple Pen

No abstract provided.

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News Readers, Helen B. Harding Nov 1937

News Readers, Helen B. Harding

Purple Pen

No abstract provided.

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