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Thermal Expansion Of Single Crystals Of Zinc, William P. Staker
Thermal Expansion Of Single Crystals Of Zinc, William P. Staker
Proceedings of the Iowa Academy of Science
The thermal expansions of sixteen zinc single crystals have been measured in the temperature range 20°-100° C. The expansion coefficient is constant and obeys the Voigt symmetry relation.
Plasticity Of Zinc Single Crystals, E. P. T. Tyndall
Plasticity Of Zinc Single Crystals, E. P. T. Tyndall
Proceedings of the Iowa Academy of Science
Some observations are presented of the plastic flow of zinc at very small stresses, just beyond the elastic limit.
Relative Intensities In The Hollow-Cathode Discharge, E. H. Winger
Relative Intensities In The Hollow-Cathode Discharge, E. H. Winger
Proceedings of the Iowa Academy of Science
The effects of various cathodes of different internal dimensions on the relative intensities of PbII lines in the hollow-cathode discharge were investigated. The discharge was operated in Helium at a pressure of 1.5 mm. Hg and currents of 175 milliamperes. Results were obtained showing a definite variation in relative intensities with changing cathode dimensions. The differences were the most marked for the larger cathodes and actual intensities and temperatures were found to be greater in the larger cathodes. Except for a few exceptions, explainable in a qualitative manner by a consideration of the perturbations involved, the results proved to be …
The Relative Scholastic Accomplishment Of Two Classes Of College Freshman, Mary Ellen Appleby, Gerald Grant, Mack T. Henderson
The Relative Scholastic Accomplishment Of Two Classes Of College Freshman, Mary Ellen Appleby, Gerald Grant, Mack T. Henderson
Proceedings of the Iowa Academy of Science
Beginning with the year 1941-42, the freshmen entering Grinnell College found a very different educational program from that of the last few years. The new program included the introduction of the four-course plan. Under this plan all courses meet four times a week and give four hours credit, and nearly all students carry four courses each semester. In addition, each freshman takes an orientation course, which last year carried one hour credit, and this year is compulsory but without credit.
Reaction Patterns During A Performance Test, Fred Kroeger, Mack T. Henderson
Reaction Patterns During A Performance Test, Fred Kroeger, Mack T. Henderson
Proceedings of the Iowa Academy of Science
On previous experimentation with the Grinnell Eye-hand Coordination Test it was observed that each subject approached the test in a different manner. Could these things be observed during the test performance? If these observations could be made with reasonable accuracy, it would be likely that this technique would give us much needed information regarding the work habits and other personal characteristics of the person taking the test. With this purpose in mind it was decided to make some direct observations of persons taking the Grinnell Eye-hand Co-ordination Test. B. L. Travers (1941) in his article IMPROVING PRACTICAL TESTS, has also …
Finding For A Psychology Of Religion, Earle E. Emme, Lowell De Garmo
Finding For A Psychology Of Religion, Earle E. Emme, Lowell De Garmo
Proceedings of the Iowa Academy of Science
A recent analysis of the nine most recent textbooks on the Psychology of Religion revealed a dearth of the commonly accepted findings in the field of psychology. Early authors omit topics of personality, mental health, personal religion, and religious expression. Childhood and adolescence were discussed in a minor way. Much emphasis was given to mysticism, immortality, primitive religions, prayer and other topics of considerable interest to theologians. The needs and interests of children, adolescents, and adults are readily recognized as basic to any adapted psychology of religion. Likewise, ideals, character values, methods of influencing youth, etc., should be rated as …
Speech Sound Status Of Infants During The Sixteenth, Seventeenth And Eighteenth Months, Frances J. Anderson
Speech Sound Status Of Infants During The Sixteenth, Seventeenth And Eighteenth Months, Frances J. Anderson
Proceedings of the Iowa Academy of Science
The speech sounds of twenty-nine infants from the sixteenth to the eighteenth months were transcribed in the International Phonetic Alphabet. Comparisons were made of vowel and of consonant frequencies as between each of the three months. Further comparisons were made with other age groups in order to show the developmental status of the use of speech elements of the age group.
The Scaling Of Word Attributes, C. Hess Haagen
The Scaling Of Word Attributes, C. Hess Haagen
Proceedings of the Iowa Academy of Science
The need for learning materials, quantified as to their degrees of relatedness in meaning, has become increasingly evident as learning experimentation and theory imply more and more the important role which similarity may play in transfer phenomena. The present study was undertaken to provide materials which might be used in a more direct attack upon this and related problems.
Color Experiment With Cattle, Earle E. Emme
Color Experiment With Cattle, Earle E. Emme
Proceedings of the Iowa Academy of Science
Findings. 1. General attention to red, white, black and green banners ranked first. 2. The white banner received more attention than either the red, black, or green banners. 3. The red, green, and black banners received equal attention. 4. The red banner, contrary to traditional belief, did not excite the cattle to any greater degree than did any one of the other banners and less than the white one. (For further details see J. of Psychol. 12:183-184. 1941)
The Speech Sound Status Of A Small Group Of Low-Grade Feeble-Minded Children, Orvis C. Irwin
The Speech Sound Status Of A Small Group Of Low-Grade Feeble-Minded Children, Orvis C. Irwin
Proceedings of the Iowa Academy of Science
The speech sounds of a group of ten feeble-minded children with an average age of three years were transcribed in the International Phonetic Alphabet at a year's interval. Comparisons were made of the two transcriptions. Further comparisons were made of the transcriptions of these feeble-minded children's records with six month old infants and with adult speech sound transcriptions.
Perception Of Body Tilt, Earl Schubert
Perception Of Body Tilt, Earl Schubert
Proceedings of the Iowa Academy of Science
In the experimental runs the subject sat in a chair on a platform about five feet square. The platform could be tilted either by the experimenter or by manipulations on the part of the subject. The amount of tilt was controlled by means of a hydraulic system, which was relatively silent. The subject was carefully blindfolded during all trials. For each trial the experimenter set the platform at a pre-determined angle of tilt and then signalled the subject to bring himself back to the level position. Measurements were made for both longitudinal (forward-backward) and lateral (sidewise) tilt. The principal finding …
The Use Of The Standard Partial Regression Coefficient In Constructing General Botany Achievement Tests, W. H. Bragonier
The Use Of The Standard Partial Regression Coefficient In Constructing General Botany Achievement Tests, W. H. Bragonier
Proceedings of the Iowa Academy of Science
Since 1926, various aspects of the general botany teaching program at Iowa State College have been studied. Victor (1933) and Dietz (1935) described studies dealing with teaching procedures and techniques and evaluation practices. Kreutzer (1935) and Dietz and Gould (1939) reported on certain phases of the testing program, particularly the practice of grouping students enrolled in Botany 101 according to scores made on pretests. Bragonier (1941) described the methods used in constructing and evaluating the pretests. The value of grouping the students for instructional purposes is generally acknowledged within the botany department, however, the means by which the students are …
Teaching To Think In A Field Rather Than About It, E. W. Lindstrom
Teaching To Think In A Field Rather Than About It, E. W. Lindstrom
Proceedings of the Iowa Academy of Science
Perhaps the clearest definition of thinking in a field of study as the preferable educational approach is to recall Hazlitt's essay "On the Ignorance of the Learned" where he says, "If we wish to know the force of human genius we should read Shakespeare. If we wish to see the insignificance of human learning, we may study his commentators." Strong words, but they bring out the point. If not, think in terms of pure text-book learning.
Nature Of Eimeria Nieschulzi-Growth Promoting Potency Of Feeding Stuffs 4. Riboflavin And Nicotinic Acid, Elery R. Becker
Nature Of Eimeria Nieschulzi-Growth Promoting Potency Of Feeding Stuffs 4. Riboflavin And Nicotinic Acid, Elery R. Becker
Proceedings of the Iowa Academy of Science
Observations on the effect of certain vitamins on the multiplication of Eimeria nieschulzi in its rat host have indicated that under certain conditions the infection may be significantly modified by feeding these materials. Vitamin B1 had a moderately restraining effect on the development of the parasite, vitamin B6 strongly enhanced its growth, while the two vitamins fed together limited its increment considerably more stringently than vitamin B1 alone (Becker and Dilworth, 1941). Pantothenic acid, like vitamin B6, enhanced the coccidium-growth-promoting potency of the otherwise unsupplemented ration, and neutralized the growth-inhibiting properties exhibited by the combination …
Comparative Studies On Gonad Development In The Rat, The Pig And In Cattle, J. D. Thomson
Comparative Studies On Gonad Development In The Rat, The Pig And In Cattle, J. D. Thomson
Proceedings of the Iowa Academy of Science
The relatively clear and simple developmental pattern of the frog gonad (Witschi 1914, 1924, 1929) makes it a good basic type with which to compare the sex glands of higher vertebrates. The origin and development of the elements of the sex glands of higher vertebrates, especially mammals, are not as clear as in amphibia.
The Mouth Parts Of The Firebrat Thermobia Domestica (Packard), (Thysanura), Roberta O'Harra, J. Alfred Adams
The Mouth Parts Of The Firebrat Thermobia Domestica (Packard), (Thysanura), Roberta O'Harra, J. Alfred Adams
Proceedings of the Iowa Academy of Science
The purpose of this paper is to present detailed drawings of the external form of the mouth parts of the adult firebrat, as a representative lepismatid. That the Lepismatidae, or silverfish insects, are of great significance in insect morphology, is well known to students of the subject. In certain respects they are the principle morphological link between the Apterygota and the Pterygota. While any of the widely distributed, domestic species of Lepisma or Ctenolepisma might well be used for morphological study, the firebrat, Thermobia domestica, is the species which seems to us the most likely to be practical for use …
Influence Of Degree Of Original Learning Upon Associative And Reproductive Inhibition, Franklin J. Shaw
Influence Of Degree Of Original Learning Upon Associative And Reproductive Inhibition, Franklin J. Shaw
Proceedings of the Iowa Academy of Science
Although the experimental literature on retroactive inhibition is vast, the only previous systematic study using verbal material of retroactive or reproductive inhibition as a function of degree of original learning is one by McGeoch (McGeoch, 1929). He found that relative amounts of retroactive inhibition varied inversely as the number of presentations given the material to be learned. The present study differs from McGeoch's primarily in that paired-associates, rather than serial lists, were learned. Since information on reproductive as well as associative inhibition as a function of degree of original learning would seem essential to the formulation of a precise theory …
A Peculiar Staining Reaction In Euglena Rubra Hardy 1911, Leland P. Johnson
A Peculiar Staining Reaction In Euglena Rubra Hardy 1911, Leland P. Johnson
Proceedings of the Iowa Academy of Science
During experimental work in which routine temporary stains were applied to various species of Euglena, an unusual reaction was found to occur in Euglena rubra when subjected to Noland's 1928 stain and fixative.
An Anomaly In The Cat, Fae M. Shawhan
An Anomaly In The Cat, Fae M. Shawhan
Proceedings of the Iowa Academy of Science
The purpose of this paper is to report a case of diaphragmatic hernia which was observed in the study of an embalmed cat received by the Zoology Department of Drake University.
A Preliminary List Of The Cutworms Known To Occur In Iowa, Elizabeth Jerrell, H. E. Jaques
A Preliminary List Of The Cutworms Known To Occur In Iowa, Elizabeth Jerrell, H. E. Jaques
Proceedings of the Iowa Academy of Science
For the past two years the writer has been giving special attention to collecting and rearing life histories of the members of the Family Noctuidae to which the cutworms belong, and in studying their taxonomy. There are over 2600 species of this family in the United States. Noctua is the Latin word for "owl:" these moths fly by night and some have shiny eyes, hence they are called "owlet" moths. Like the adults, the larvae feed at night. The larvae may be distinguished from white grubs (Phyllophaga sp.) which are often erroneously called cutworms by the presence of prolegs on …
Speech Sound Status Of Newborn Negro And White Infants, Han Piao Chen
Speech Sound Status Of Newborn Negro And White Infants, Han Piao Chen
Proceedings of the Iowa Academy of Science
The speech sounds of 50 white and of 30 negro newborns were transcribed in the International Phonetic Alphabet. Comparisons were made between the two groups. Further comparisons were made of these two groups with older infants and with adults.
Directions Tor The Preparation Of Manuscripts For Publication In The Proceedings Of The Iowa Academy Of Science
Proceedings of the Iowa Academy of Science
No abstract provided.
The Story Of Parthenium Alpinum, George J. Goodman
The Story Of Parthenium Alpinum, George J. Goodman
Proceedings of the Iowa Academy of Science
This plant was collected in 1834 by Thomas Nuttall somewhere in the Rocky Mountains. It has never again been collected on his trail, and it is not known just where he got it. The information he gives is confusing, but it is probable that the plant was collected either in eastern Wyoming or near the Snake River plain in Idaho.
Trepanation And The "Catlin Mark", William Goldsmith
Trepanation And The "Catlin Mark", William Goldsmith
Proceedings of the Iowa Academy of Science
This paper deals with the confusion of a certain anomalous condition of the human skull with one type of trepanation. Many skulls with an opening in each parietal bone should not be cited as examples of trepanation, but rather clear cut cases of the "Catlin Mark" of Goldsmith, or more technically referred to by other writers as: "Large Bilateral Parietal Foramina", "Foramina Parietalia Permagna", or "Fenestrae Parietales Symmetricae" of Halberts
Some Structural Features Of Mycorrhizae On Coniferous Seedlings, Andrew L. Mccomb, J. E. Sass
Some Structural Features Of Mycorrhizae On Coniferous Seedlings, Andrew L. Mccomb, J. E. Sass
Proceedings of the Iowa Academy of Science
Development of mycorrhizae was found to be promoted by inoculating nursery soil with humus and top soil from well-established coniferous plantations, or by application of phosphorus fertilizer. Two types of host cell fungus relationships have been observed. In one type the root has a mantle of mycelium with abundant clamp connections. The internal mycelium is intercellular and segmented into short, straight-sided cells. The second type has a mantle of much coarser, "monilioid" mycelium.
The Variability In The Color Of Red Clover Seeds, Its Cause, And Relation To The Value Of The Seeds, John N. Martin
The Variability In The Color Of Red Clover Seeds, Its Cause, And Relation To The Value Of The Seeds, John N. Martin
Proceedings of the Iowa Academy of Science
Red clover seed samples almost invariably arc of three principle colors, violet or purple, yellow, and brown. The brown seeds have been pretty well proven to be considerably inferior in quality to the seeds of the other colors. Some investigators have shown the purple to be superior to the yellow both in germination and vigor of plants produced, while other investigators have data to show that the yellow seeds are equal to or superior to the purple or violet seeds.
Charcoal-Rot Of Maize, New To Iowa, George Semeniuk
Charcoal-Rot Of Maize, New To Iowa, George Semeniuk
Proceedings of the Iowa Academy of Science
The charcoal-rot of maize caused by Sclerotium bataticola Taub. was found near Ames, Iowa, during mid-August, 1941, on several prematurely dead stalks in a field of early planted corn. Greenhouse tests with the fungus produced seedling infection of maize with necrosis of the roots and mesocotyl.
1942 Little Tutor, Iowa State Teachers College High School
1942 Little Tutor, Iowa State Teachers College High School
Malcolm Price Laboratory School Yearbooks
The student yearbook of the Teachers College High School (later the Northern University High School, part of the Malcolm Price Laboratory School of the University of Northern Iowa).
Integration, Dugan Laird