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Basic Concepts In The Interpretation Of Visual Phenomena, Theodore Louis Jahn

Proceedings of the Iowa Academy of Science

During the past decade several attempts have been made to formulate equations which would explain certain visual phenomena, namely flicker fusion frequency, brightness discrimination, visual acuity, and instantaneous thresholds as functions of intensity, and light and dark adaptation as functions of time. These various equations are based on several fundamental concepts regarding the mechanism by which the visual sensation is determined. Each concept has been explained by the original author at the time the theory was proposed, but no comparison of these basic ideas has yet appeared in the literature. The purpose of the present paper is to make such …

The Temperature Of The Mouse In Health And Disease, J. A. Weir

Proceedings of the Iowa Academy of Science

Accompanying certain types of inflammation the heat-regulating mechanism of the body is disrupted so that heat accumulates and the body temperature rises. The individual is said to have a fever. Since the early work of Ledingham (1908) in which he showed that the rate of phagocytosis increased with a rise in temperature, a moderate fever has come to be regarded as a defense mechanism of the body. It is, therefore, of some significance that the normal and deviations from normal temperature be known for laboratory animals which are to be used to measure the response of an individual host to …

The Fifty-Eighth Session Of The Iowa Academy Of Science And The Thirteenth Convention Of The Junior Academy Of Science Of Iowa, April 19 And 20, 1946, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

College Catalog 1945-1946, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents:

College Calendar for the year 1946-47 ... 7
State Board of Education ... 9
Officers of Administration ... 11
Officers of Instruction ... 12
Department of Teaching ... 18
Extension Service ... 21
Other Officers and Assistants ... 22
Faculty Committees ... 26
General Information
Foreword ... 29
Buildings and Grounds ... 30
Enrollment and Registration ... 35
Fees ... 36
The Residence of Women Students ... 37
The Residence of Men Students ... 39
The Commons ... 33, 40
Resume of a Student's Expenses Per Year ... 41
Employment ... 41
Partial Tuition Exemptions ... 42 …

The Alumnus, V30n1, January 1946, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- Winter and Spring Events
-- The Campus Today
-- Veterans Return to Alma Mater
-- C.A. Fullerton Dies
-- Four New Building in Post-War Plans
-- Purple Panthers Back from Wars
-- Alumni Celebrate First Post-War Homecoming
-- "I Love It!" Says First-Year English Teacher
-- There's Something In a Name
-- Veterans Back on Campus
-- Keeping Up with Alumni
-- Marriages
-- Births
-- Deaths
-- Your Teacher Placement Service

A Progress Report On The Preservation Of The Prairie, Ada Hayden

Proceedings of the Iowa Academy of Science

In accord with the specifications of the Prairie Project sponsored by the Iowa Academy of Science, the following recommendations for preservation of prairie have been co-operatively formulated; a number of the most desirable remaining tracts of prairie representative of virgin soils, flora, and fauna have been described and photographed. Not all of the tracts reported in the survey of the state by counties have been yet inspected.

RECOMMENDATIONS FOR PRESERVATION OF PRAIRIE: The preceding brief report on Prairie Areas in Iowa, (Hayden, 1941) which should be preserved has shown: 1. That preservation of representative, selected prairie areas is a practical …

Conduction In Dicotyledon Leaves, Robert B. Wylie

Proceedings of the Iowa Academy of Science

This paper outlines briefly certain aspects of foliage leaves that are related to the form and distinctive functions of these organs. Conclusions from earlier papers on conduction problems of leaves are noted in connection with a preliminary report on the patterns of the minor venation in dicotyledon leaves. In most of these studies on leaves it has been necessary to use serial sections cut both transversely and in the plane of the blade. The latter, or paradermal sections, are favorable for the study of all tissues, seen, as if looking through the blade. They are especially helpful in the interpretation …

Reports - Executive Committee; Secretary; Treasurer; Staff Reports; Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

Culturing Myxomycetet Plasmodia For Classroom Use, Margaret Barton Timnick

Proceedings of the Iowa Academy of Science

The Myxomycetes are organisms which exhibit both animal and plant characteristics. This dual nature is of considerable interest and worthy of consideration in planning an elementary botany course. Since the plasmodial and fruiting stages can easily be cultured, and recognized, the study of these organisms is a practical project. In the present study bark was collected from well-rotted elm, cottonwood, soft maple, oak stumps and from decaying elm branches found in cool moist places. Oak, ash, aspen, box elder and elm leaves were collected from pockets in the sod where they had gathered and wintered. These collections were made at …

In Memoriam: Henry Lane Bruner; Lowell Holbrook Chamberlain; Clyde W. Emmons; Annie Wilson Fleming; William Headrick Gemmill; Thomas J. Maney; Florence Willey Nichols; Henry Waldo Norris; Charles Dana Reed, Nathan E. Pearson, O. R. Sweeney, Gertrude A. Herr, Helen F. Smith, Earle D. Ross, H. H. Plagge, Ada Hayden, Henry S. Conard, Lyle R. Fletcher

Proceedings of the Iowa Academy of Science

No abstract provided.

The General Education Of The Science Teacher, R. W. Getchell

Proceedings of the Iowa Academy of Science

Volumes have been written on this topic and it would be the height of temerity to assume that anything really new could be contributed in this paper. Opinions, of course, differ and one justification for this discussion lies in the exchange of ideas which it may provoke. Another reason for discussing this subject stems from the present movement in colleges and secondary schools to inject the concept of so-called "general education" into the curriculum. The best-known effort of this sort is centered in Harvard College and has been reported in the volume "General Education in a Free Society." The general …

Swine Brucellosis: Results Of Vaccination Experiment, S. H. Mcnutt, T. S. Leith

Proceedings of the Iowa Academy of Science

This discussion will consist of a consideration of the results obtained in a recently concluded brucellosis vaccination or exposure experiment in hogs together with a brief review of the results reported by others.

Sparing Genes For Further Evolution, J. A. Weir

Proceedings of the Iowa Academy of Science

The first step in biological evolution, according to the classical concept, was the ability of an organic entity, the gene, to duplicate itself by utilizing available inorganic molecules which themselves were incapable of reproduction. The next step was the acquisition by the gene of the property of catalyzing the production of a substance other than itself to be utilized as its host. In this way an aggregate of genes, each responsible for a specific reaction, could give rise to more complex structures. The manner of development of a simple organism would then depend upon the actions of the genes which …

Iowa State Teachers College Schedule Of Classes, Fall 1945, 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.

Notes On The Egg Laying Habits Of The Soft Shell Turtles, William M. Goldsmith

Proceedings of the Iowa Academy of Science

During the summer of 1940 the writer with six students had an opportunity to study in the vicinity of Dubuque, certain nesting habits of the smooth, brown, soft-shell turtle Amyda mutica. The river was low during June and early July, offering ideal conditions for study when the sandbars and sandy shore lines were exposed. These are the most favorable nesting grounds of Amyda mutica. Since the conditions for field study were so favorable in this locality, it was decided that before the close of the next breeding season more thorough observations would be made. Unfortunately the river remained …

College Catalog 1944-1945, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents:

College Calendar for the year 1945-46 ... 7
State Board of Education ... 9
Officers of Administration ... 11
Officers of Instruction ... 12
Department of Teaching ... 18
Extension Service ... 21
Other Officers and Assistants ... 22
Faculty Committees ... 25
General Information
Foreword ... 28
Buildings and Grounds ... 29
Enrollment and Registration ... 34
Fees ... 35
The Residence of Women Students ... 36
The Residence of Men Students ... 38
The Commons ... 32, 39
Resume of a Student's Expenses Per Year ... 40
Employment ... 40
Partial Tuition Exemptions ... 41 …

The Iowave [Newspaper], January 6, 1945, United States. Naval Reserve. Women's Reserve.

The IOWAVE [newspaper]

The IOWAVE was a newspaper focused on the activities of the WAVES (Women Accepted for Volunteer Emergency Service) who were being trained at the Naval Training School temporarily located on the campus of Iowa State Teachers College (later the University of Northern Iowa). The IOWAVE newspaper includes many articles regarding the day-to-day life of the WAVES trainees, as well as articles chronicling the ongoing progress of the war effort.

Relating The Out-Of-Doors To The Indoors In Teaching Biology, H.E. Jaques

Proceedings of the Iowa Academy of Science

Knowing the names of plants and animals and their phylogenetic relationship to each other is highly essential for success in any field of biological study. In spite of the immense numbers of species of plants and animals, it is surprising how much can be accomplished in learning to recognize the common species of a region, by giving it some consistent attention. It would seem that plant and animal recognition should have a fairly large place in nature study work in the grades and m biology classes in high school. Such work is easily within the ability of students of that …

Compression In Microtome Sections Of Plant Tissues, H. L. Dean, L. Mangum

Proceedings of the Iowa Academy of Science

Compression and other distortions in microtome sections of animal tissues have recently been the object of studies by Dempster (1) and Marengo (2). Dempster stated that compression of animal tissues "embedded and cut in 52°C. m.p. "Biloid" paraffin varied from 15% in thick sections (20-25µ) to over 50% in identical material sectioned between 5 and 10µ. He varied the clearance angle of the knife from l-6°, tried several kinds of paraffin with different melting points and used a number of cutting speeds to determine the amount of compression under routine laboratory conditions. Marengo, however, found that compression was slight in …

The Pen, Volume 17, Number 1, Winter 1945 [Download Entire Issue]

Purple Pen

No abstract provided.

Human Hans (Illustrated), Joyce Bertness

Purple Pen

No abstract provided.

Iowa State Teachers College Schedule Of Classes, Winter 1944-45, Spring 1945, 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.

Outline Of Culture Of Prehistoric Indians Of Iowa, W. E. Sanders

Proceedings of the Iowa Academy of Science

When groups of people live in considerable isolation, they tend to become physically homogeneous and adopt common ways of life. Their folkways extend into the details of their social customs and into the modes and styles of their material creations as well. Out of these customs and practices develop those institutions which have received the sanction of the group. The mores, customs, and institutions of a society are the particular topics of study of the sociologist. But the material devices of a social organization are equally important criteria of its culture and are, indeed, the only evidence that remains of …

Reports - State Parks And Preserves; Birds And Mammals; Fisheries; Antiquities; Forests; Soil And Water Conservation; Water Supply

Proceedings of the Iowa Academy of Science

No abstract provided.

In Memoriam: Charles Carter; James Penn Goodrich; William Harmon Norton; Dayton Stoner; William Trelease, Theodore L. Jahn, Neil A. Miner, Charles R. Keyes, T. C. Stephens, Ada Hayden

Proceedings of the Iowa Academy of Science

No abstract provided.

A Preliminary List Of The Carabidae Known To Occur In Iowa, H. E. Jaques, Leonard Redlinger

Proceedings of the Iowa Academy of Science

Ground Beetles, as this Coleopterous family is called, are for the most part terrestrial and hide in almost every conceivable place. They are particularly abundant under stones and objects on the ground and wherever other small invertebrates are found. Practically all of them are carnivorous and mostly nocturnal in habits. Many species are attracted to lights, and may be easily collected at night or by the use of light traps. The Carabids are predacious on worms, snails, caterpillars, grubs, maggots, and in fact almost any living animal that they can overcome. Because of their predatory habits they are considered beneficial, …

Domestic Habits Of Two Flies, David T. Jones

Proceedings of the Iowa Academy of Science

Recent observations indicate that, on two occasions at least, two species of wild flies came into houses and acted like species we regard as house flies. The two species are: Cochliomyia americana Cushing and Patton and Ceratoxys latiuscula (Loew), which will be discussed in the order above. Cochliomyia americana, the screw-worm fly, a Calliphorid, is usually a wild elusive, swift-flying, out-of-door creature, occasionally attacking man, but more frequently ovipositing in the wounds of domestic animals. In Utah the closest they were found to a dwelling was when two were captured feeding on a fresh deer head in a garbage …

Current Developments In Science And Biology Teaching, W. F. Loehwing

Proceedings of the Iowa Academy of Science

Though science and education as a whole are currently and properly geared to the war effort, it is commendable that teachers and administrators are, nevertheless, already giving foresighted attention to desirable patterns of postwar instruction and matters of permanent curricular policy. While perhaps no one can as yet predict the exact social pattern of a world at peace nor fully foretell its demands upon education, certain emergent trends already delineate the scope of the problem and the probable areas of major change. Science is destined to play an important role in peace as it has in war but with notable …

The Anatomy And Embryology Of The Hemipenis Of Lampropeltis, Diadophis And Thamnophis And Their Value As Critera Of Relationship In The Family Colubridae, Hugh Clark

Proceedings of the Iowa Academy of Science

Evidence for a natural relationship among species, genera and higher groups of snakes has come principally from studies in comparative anatomy and geographical distribution. Fossil remains have yielded very little toward the solution of problems of interest to the taxonomic herpetologist, and genetic work with snakes has only recently been undertaken. The hemipenis has been used extensively in the classification of snakes. The present work was undertaken with the hope that possibly a comparative study of the developmental features of this organ might throw some light on the relationship among certain sub-families of the Colubridae which could not be ascertained …

Studies On Iowa Spiders, Karl A. Stiles, Doris Helen Luber

Proceedings of the Iowa Academy of Science

The spiders reported in this paper were collected by Professor H. E. Jaques and his students in the summer of 1940. From this collection twenty-five species and fifteen genera representing seven different families have been determined. Of the one hundred and twenty-eight 'individuals reported, there are sixty-three males, sixty-three females, and two immature. These spiders came from twenty-nine counties; their geographical distribution is indicated in Plate 1. All determinations were checked by W. J. Gertsch of the American Museum of Natural History, New York City, and it is a pleasure for the authors to acknowledge their appreciation of Dr. Gertsch's …