Digital Commons Network^™

In Memoriam: Robert B. Cooper; Henry Ellsworth Ewing; Clifford T. Grove; Ada Hayden; John W. Howell; Ellison Orr; Louis Bevier Spinney; Charles Paine Winsor

Proceedings of the Iowa Academy of Science

No abstract provided.

Papers Presented At The 1951 Meeting

Proceedings of the Iowa Academy of Science

No abstract provided.

Astraeus And Geastrum, Marion D. Ervin

Proceedings of the Iowa Academy of Science

The genus Astraeus, based on Geastrum hygrometricum Pers., was included in the genus Geaster until Morgan9 pointed out several differences which seemed to justify placing the fungus in a distinct genus. Morgan pointed out first, that the basidium-bearing hyphae fill the cavities of the gleba as in Scleroderma; second, that the threads of the capillitium are long, much-branched, and interwoven, as in Tulostoma; third, that the elemental hyphae of the peridium are scarcely different from the threads of the capillitium and are continuous with them, in this respect, again, agreeing with Tulostoma; fourth, that there is …

The Relationship Of Tepp And Photoperiod To Flowering And Fruiting In Tomato, Wayne C. Hall

Proceedings of the Iowa Academy of Science

The organic phosphorus compounds hexaethyl tetraphosphate (HETP) and tetraethyl pyrophosphate (TEPP) are the active components of certain commercial insecticide formulations and have been shown to be toxic, at relatively low concentrations, to a rather wide array of organisms (Hall, 1950; Hall and Jacobson, 1948a: Hall, 1951; Harris, 1947; McIlrath, 1950; Smith et. al., 1948a and l 948b). From their work on the chemical and insecticidal properties of these compounds, Hall and Jacobson (1948a, 1948b) concluded that the so-called HETP is not a specific compound but actually a mixture of esters owing its biological potency to the TEPP that it contains. …

A Study Of Chaetomium In Cellulose Decay, Wendall M. Farrow

Proceedings of the Iowa Academy of Science

Only in recent years has there been any extensive investigation of fungi capable of attacking and utilizing cellulose materials. During this period many genera have been shown to be active cellulose destroyers. Chaetomium, which has been studied rather extensively, is a genus with fifty or more species, about one-half of which are known to be relatively high in cellulolytic activity.

One of the most extensive studies in this genus has been that of Greathouse and Ames (3). They tested sixteen species, three of which were new, using various sources of nitrogen. They found that the sixteen species fall into …

Unialgal Cultures Of Haematococcus Lacustris (Girod) Rostaf., R. L. Hulbary

Proceedings of the Iowa Academy of Science

Algae are being used more frequently in the attack on an ever widening variety of biological problems. We find them in mam laboratories as experimental organisms in the study of the fundamentals of photosynthesis, mineral nutrition, and genetics. Their present uses and potential uses commercially such as, sources of food, in food processing, and in industrial processes are growing steadily in number. Because of the increasing interest in them experimentally and practically, a better understanding of their culture is imperative. Several forms such as, Chlorella, Scenedesmus, and some of the Cyanophyta have been cultivated for laboratory purposes with success. …

Use Of The Morphology Of Buried Soil Profiles In The Pleistocene Of Iowa, W. H. Scholtes, R. V. Ruhe, F.F. Riecken

Proceedings of the Iowa Academy of Science

Buried profiles of weathering have been recognized and utilized by many geologists in the determination and classification of Pleistocene deposits (1) * (2) (10) (20). In Iowa, Kay (5) used the term gumbotil for super drift clays. The gumbotil was found on tabular divides and other remnants of the Kansan drift plain, and was considered to be the result of weathering of glacial drift (8). Kay and Apfel (7) recognized gumbotil as a weathered product, but as something distinct from soil. For example, the Aftonian interglacial stage was stated by them as being represented in Iowa by "wide-spread Nebraskan gumbotil, …

Structure In The Des Moines Series At Redfield, Iowa, Charles S. Gwynne

Proceedings of the Iowa Academy of Science

This paper describes structure of the Des Moines series in the shale pit of the Adel Clay Products Company at Redfield, Dallas County as at present (1951) exposed. An anticline of major dimensions is known to be present in the vicinity of Redfield. The first description was by Leonard (1898, p. 90-91). Dille (1926, p. 194-195) described the structure as it was known at the time, after exploratory wells had been drilled for oil and gas. Norton (1912, p. 811-922) made no mention of it when writing on the underground water of the central district. Other exploratory wells have been …

The Absorption Spectra Of Derivatives Of Phthalic Anhydride, Calvin Hanna, W. T. Smith Jr.

Proceedings of the Iowa Academy of Science

The organic qualitative reagent 3-nitrophthalic anhydride has been found useful in the characterization of alcohols and mercaptans. It is of particular interest to note that in the products formed by the reaction of this reagent with alcohols the ester group is uniformly ortho to the nitro group rather than meta. Similarly it has been noted that the reaction of quinolinic anhydride with methyl alcohol likewise gives the a-methyl ester (Kirpal, 1907). On the other hand, the reaction between methyl alcohol and 4-nitrophthalic anhydride or cinchomeronic anhydride results in the formation of derivatives in which the ester group is para …

Early History Of The Iowa Mathematics Section, R. B. Mcclenon

Proceedings of the Iowa Academy of Science

On a certain evening in November, 1915, a group of six mathematics teachers had supper together in a small restaurant in downtown Des Moines. As I remember the group, it consisted of Professors Smith, Baker, and Reilly of the State University, Professor Neff of Drake, Professor Wester of State Teachers, and myself. Since we had all been attending the discussions in the Iowa Education Association, we very naturally fell to conversing about the problem of mathematics teaching at the university and college level. We all felt that the programs of the State Teachers Association, as it was then named, left …

Statements Of Cynicism Rated By College Students, Martin F. Fritz

Proceedings of the Iowa Academy of Science

The investigation of cynicism by means of testing procedures has been described before the Psychology Section of the Iowa Academy of Science at previous meetings (see references). This paper is a report of a further study of cynicism using the sixty-five items of the short-form of the so-called Practical Policy Test (3). The problem was to determine how strongly cynical these items would be considered to be when the subject does not think of them as applying to himself but attempts to evaluate them "objectively". In other words, what statements are considered by college students as expressing the most intense …

Rate Of Manipulative Learning As A Function Of Goal-Setting Techniques, Gerald C. Helmstadter, Douglas S. Ellis

Proceedings of the Iowa Academy of Science

Although most studies involving the use of goals as motivators in learning have been concerned with which types of goals produce the greatest improvement, there have been some indications that the method of presenting a given type of goal may determine its effectiveness.

Some Components Of Mechanical Composition, Gilbert E. Miller

Proceedings of the Iowa Academy of Science

In the search for unitary mental traits it appears that the answer may not be finite. In view of this conclusion on the part of several investigators (2), the writer suggests the probability that psychological tests intended to measure ability in a specified area may contain a number of psychological components. As mechanical comprehension is one of the important areas of psychological testing, the writer believes that determination of the components of this area would be of great value.

Preliminary Report On The Distribution Of Bottom Organisms In West Lake Okoboji, Iowa, John E. Bardach, John Morrill, Frank Gambony

Proceedings of the Iowa Academy of Science

"Little is known of the bottom fauna of the locality." This passage is taken from an Extension Bulletin of the State University of Iowa which describes the Iowa Lakeside Laboratory on West Lake Okoboji and its facilities for biological investigations. It should be stressed at the outse.t that there are few lakes which do not share with Okoboji this relatively unexplored state of their bottom biota. A study was begun in July 1950 with a view to eventually answering the following questions: 1. What is the distribution of macroscopic bottom dwelling animals in the lake? 2. Does this distribution follow …

An Apparatus For Measuring Reaction Time Under Conditions Of Preoccupation, Richard E. Frey

Proceedings of the Iowa Academy of Science

It seems axiomatic that visual, auditory, or other stimuli are not raced to as quickly when the observer is preoccupied. Students of accident prevention have pointed out that laboratory measures of re· action time are not representative of everyday life situations where preoccupation and distractions present an entirely different situation from that of controlled laboratory conditions. The present apparatus was designed to measure various response times under controlled conditions, both with and without preoccupation

The Role Of Albedo In Color Discrimination Of Spider Monkeys, Robert Q. Easter, Daryl G. Nichols

Proceedings of the Iowa Academy of Science

The problem of color discrimination of animals has been variously discussed by writers. While it is generally conceded that the cones are the receptors of color, the different theories of vision as expounded by Young and Helmholtz, Hering, Ladd-Franklin and others are not always in essential agreement that specific cones are the receptors of specific wave lengths of light. While form discrimination of rats has been clearly demonstrated in the researches of Fields, Fritz, Lashley and others, the discrimination of color by the lower forms of animals is not so well established. Writers also differ as to primates, but since …

Studies On Loricate Ciliophora Ii. Folliculina Boltoni Kent, John Meacham Hamilton

Proceedings of the Iowa Academy of Science

The family Folliculinidae is composed of ciliated Protozoa which belong to the order Spirotrichida. The family is characterized by a flask-shaped, transparent lorica and by a peristomial field drawn out into two wing-like projections which can be extended beyond the aperature of the lorica when the animal is feeding, and can be withdrawn into the lorica when the animal contracts. The known species of this family are all marine except for one fresh water form, Folliculina boltoni. This unique member of the family has been found in Europe and South America, and Wailes (1928) described it from a fresh …

Some Effects Of Color On Perception Of Relative Motion At Night, Donald A. Hoppe, A. R. Lauer

Proceedings of the Iowa Academy of Science

Past research by the present authors (1951) has demonstrated that increasing the visibility of a vehicle at night decreases the time and difficulty for perception of a speed differential between two vehicles traveling in the same direction. Three of the criteria given by Luckiesh (1944), size, contrast and over-all illumination, were used as basic factors for varying the visibility. The contrast between the vehicle and background was varied by using materials with different reflection characteristics on the rear panel. The materials used reflected white light, but the availability of colored reflecting materials has made necessary this pilot study for the …

Periodicities In Motor Performance As A Function Of Work-Surface Height, Douglas S. Ellis

Proceedings of the Iowa Academy of Science

Although motor learning is generally assumed to be an orderly process, the observed performance curves of individuals and groups of individuals are usually rather irregular with observed points falling both above and below the general trend of the curve. This conflict between theory and observation has typically been resolved by attributing such variations to the chance operation of uncontrolled variables. However, a recent theory describes a mechanism by which such variations might occur. The present paper extends this theory to the problem of performance variability, and presents an analysis of performance curves obtained under two conditions of work-surface height to …

Hydra In An Iowa Nursery Lake, Tom Moen

Proceedings of the Iowa Academy of Science

During the months of May and June of 1946, tremendous numbers of a brown hydra, tentatively identified by L. H. Hyman of the American Museum of Natural History, as Pelmatohydra olagactis, were found in the nursery lake known as Diamond Lake. Diamond Lake is located in sections 14 and 15 of Diamond Lake Twp., Dickinson County, Iowa. For the past fifteen years this shallow (maximum depth 6 feet), 160 acre lake has been used as a yellow pike perch, (Stizostedion vitreum vitreum, commonly known as walleye), nursery pond.

A Lead Destroying Ant From Panama, E. V. Enzmann

Proceedings of the Iowa Academy of Science

During the winter of 1947 the telephone line of a police station in the city of Balboa, Canal Zone, suddenly went dead. The station was serviced by an underground cable encased in a lead pipe of three quarters of an inch in diameter. Workmen began to dig up the cable and after a prolonged search found the cause of the disturbance. A colony of ants had attacked the lead shell of the cable, had severed it effectively in one place and had cut deep notches in several other places. In addition large areas of the lead sheathing had been peeled …

An Extreme Case Of Thermal Stratification And Its Effect On Fish Distribution, George Sprugel Jr.

Proceedings of the Iowa Academy of Science

Thermal and chemical stratification is a common phenomenon in lakes and ponds during the summer months. Most lakes, 20 or more feet deep, have a warm epilimnion separated from the colder deep water stratum, the hypolimnion, by a thermocline or zone in which the water rapidly becomes colder with increased depth.

The Status Of The Raccoon In Iowa For The Past Twenty Years As Revealed By Fur Reports, Glen C. Sanderson

Proceedings of the Iowa Academy of Science

In recent years the raccoon (Procyon lotor) has become more and more popular with 'coon hunters in Iowa. This is also true in many other Midwest and southern states. This increased interest in the raccoon as a game animal, plus the almost phenomenal increase in its numbers, has helped to focus much attention on this animal throughout the United States. Many papers dealing with various phases of the raccoon's life history and habits have appeared in the past few years. Few of these papers have presented actual figures on the trend of the population in any given area, …

Index

Proceedings of the Iowa Academy of Science

No abstract provided.

The Immature Stages Of American Pachygronthinae (Hemiptera: Lygaeidae), James A. Slater

Proceedings of the Iowa Academy of Science

The subfamily Pachygronthinae contains two genera within the limits of the United States, each with two well established species. Little is known of the life history of any species and none of the immature stages has been adequately described in the literature. This paper discusses three species: Phlegyas abbreviatus (Uhler), Oedancala dorsalis (Say), and Oedancala crassimana (Fabricius). The paper includes descriptions of all available immature stages with keys to the genera and species and means of separating the various instars within the species.

The Alumnus, V34n4, December 1950, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- The Obligations of Opportunity
-- The Campus Today
-- The College, Community, and Family all Share the New President's Time
-- College Needs Outlined in "Strayer Report"
-- Meet Your New Officers
-- Panther Sports Parade
-- Keeping Up with Alumni
-- Marriages
-- Births
-- Deaths
-- Arts and Industries

Teachers College Presents Weekly Television Show, Alumnus, December 1950

Noteworthy People of UNI Documents

Herbert V. Hake attended graduate school at the University of Iowa, where he earned his master's degree in scenic design in 1933. In the summer of 1936, he began his career at the Iowa State Teachers College (ISTC) with the Theater Department. From 1938 to 1942 he served as technical director, scenic designer, and instructor of speech courses. He was a pioneer in radio and television.

Regular Tv Programs Began Here Yesterday, The College Eye, October 6, 1950

Noteworthy People of UNI Documents

Herbert V. Hake attended graduate school at the University of Iowa, where he earned his master's degree in scenic design in 1933. In the summer of 1936, he began his career at the Iowa State Teachers College (ISTC) with the Theater Department. From 1938 to 1942 he served as technical director, scenic designer, and instructor of speech courses. He was a pioneer in radio and television.

Iowa State Teachers College Schedule Of Classes, Fall 1950, Iowa State Teachers College

UNI Schedule of Classes

A listing and schedule of the courses being taught as well as policies and procedures concerning attending classes at the Iowa State Teachers College.

The Alumnus, V34n3, September 1950, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- Homecoming Timetable
-- The Campus Today
-- President Malcolm Price Resigns; Accept Education Professorship
-- Sixty-Seventh Annual Reunion Attracts Nearly 400 Alumni, Friends
-- What is School District Reorganization?
-- Panther Sports Parade...home of champions
-- Keeping Up with Alumni
-- Marriages
-- Births
-- Deaths
-- The Chapel Fund...