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Key To Seeds Of Caesalpinioideae And Mimosoideae Of North-Central States, Duane Isely Jan 1955

Key To Seeds Of Caesalpinioideae And Mimosoideae Of North-Central States, Duane Isely

Proceedings of the Iowa Academy of Science

In connection with investigations of the legumes of the northcentral United States, seeds of the subject species were studied. This paper is concerned with the identification of seeds of the individual species; the seed characters of subfamilies herein treated are discussed in another report. Superficial characters are employed in the keys, and dissection of the seeds is not required. Outline diagrams are presented to facilitate interpretation of shape and size. These are all drawn to the same scale except Gymnocladus dioica and Gleditsia aquatica which are one-half the size of the others. Two terms require definition. Face line: A horseshoe …

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A Simple Method For Counting Solutions Containing Radioactive Phosphorus, John R. Weber Jan 1955

A Simple Method For Counting Solutions Containing Radioactive Phosphorus, John R. Weber

Proceedings of the Iowa Academy of Science

One of the most widely used radioactive isotopes for the study of metabolic reactions in ·plants is phosphorus-32, which has a convenient half life of 14.3 days and a maximum beta energy of 1. 7 Mev. This radioisotope can easily be measured by ordinary electronic methods, e.g., a geiger tube and a proportional scaling unit.

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Science Courses Offered In The Parochial High Schools Of Iowa, James W. Kercheval Jan 1955

Science Courses Offered In The Parochial High Schools Of Iowa, James W. Kercheval

Proceedings of the Iowa Academy of Science

Two previous reports to the Academy by the author have dealt with science teaching and science courses offered in the public high schools of Iowa, the second report dealing only with chemistry, offerings. Neither of these investigations touches upon the situation in Iowa's parochial schools. To complete the study such an investigation was made in the spring of 1955 and is herein reported.

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Evaluation Of Driver Education, Elmer B. Siebrecht Jan 1955

Evaluation Of Driver Education, Elmer B. Siebrecht

Proceedings of the Iowa Academy of Science

Driver education is a growing segment of the high school programs. In 1953-54 some 8,000 high schools in the United States offered to some 800,000 students a full semester's instruction m learning to drive a car. Educators and others are concerned with the effectiveness of such instruction. Periodic summaries ( 2) show trainees of such courses to have about 50 per cent fewer accidents, violations, arrests and warnings than non-trainees. Analysis of pertinent data (3,6,7) reveal no statistically significant differences in accident and violation involvements of trained and untrained drivers, when the most obvious variables are controlled, for women and …

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Notes On The Life Cycle Of Bunodera Eucaliae Miller (Trematoda, Allocreadiidae) Of The Stickleback, Eucalia Inconstans, Glenn L. Hoffman Jan 1955

Notes On The Life Cycle Of Bunodera Eucaliae Miller (Trematoda, Allocreadiidae) Of The Stickleback, Eucalia Inconstans, Glenn L. Hoffman

Proceedings of the Iowa Academy of Science

Bunodera eucaliae was described by Miller (1936, Canad .J. Res. D, 14: 11-14) in Quebec. It has since been reported from Wisconsin by Bangham (1944, Trans. Wis. Acad. Sci., Arts, and Letts. 36: 291-325) and Fischthal (1945, Trans. Wis. Acad. Sci., Arts, and Letts. 37: 157-220). In 1948 near Lamont, Iowa, the writer discovered a small spring pool which was two miles distant from the Maquoketa River. Since there was only the one species of fish present it furnished an excellent opportunity for making observations on the probable life cycle of this fish's only digenetic trematode, B. eucaliae.

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Title Page - Front Matter Jan 1955

Title Page - Front Matter

Proceedings of the Iowa Academy of Science

No abstract provided.

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The Flora Of Johnson County, Iowa, Robert F. Thorne Jan 1955

The Flora Of Johnson County, Iowa, Robert F. Thorne

Proceedings of the Iowa Academy of Science

A need for a reasonably complete and modern list of vascular plants for the Iowa City vicinity has long been felt in the field botany and taxonomy courses at the State University of Iowa. This annotated list of vascular plants indigenous or naturalized in the county is an attempt to fill that need. It is hoped that the flora will also be useful to other botanists and their students in Johnson County and adjacent areas of Iowa. The writer's field work in Johnson County has extended over a period of nearly six years (1949-1955). In that time he has collected …

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Growth, Form And Survival Of Plantation-Grown Broadleaf And Coniferous Trees In Southeastern Lowa, Norman J. Hansen, A. L. Mccomb Jan 1955

Growth, Form And Survival Of Plantation-Grown Broadleaf And Coniferous Trees In Southeastern Lowa, Norman J. Hansen, A. L. Mccomb

Proceedings of the Iowa Academy of Science

Old fields and degraded forest lands in southern Iowa were acquired by the State of Iowa during the period 1935 to 1941. A forestation program was initiated in conjunction with the Civilian Conservation Corps. Hundreds of acres of conifers and broadleafs were planted, principally during the years 1937 through 1941, on eroded upland ridge tops, steep side slopes and narrow drainage basins in the vicinities of Chariton, Keosauqua and Farmington, Iowa. Because of insufficient knowledge and experience concerning forestation practices applicable in this area, the selection of species and planting procedures was approached experimentally. A survey of these plantations was …

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Distribution Of Traffic Accident Problems With Respect To Certain Geographical Patterns, Elmer B. Siebrecht, Carl J. Eigenauer Jan 1955

Distribution Of Traffic Accident Problems With Respect To Certain Geographical Patterns, Elmer B. Siebrecht, Carl J. Eigenauer

Proceedings of the Iowa Academy of Science

The continued high frequency of automobile accidents in the United States has prompted many and varied studies relating to the general traffic accident problem. Most studies have concerned the distribution of traffic accidents by large age groups, with little attention to the relation of data to specific ages or other factors which might affect results. Recent investigations tend to follow a more analytical approach. They have concerned the relation of certain accident factors on a county-wide basis (2) and of accident and violation involvement to age, sex, mileage driven and training of drivers (1, 4, 5). The present report concerns …

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Officers, Past Presidents, And Members, Iowa Academy Of Science Jan 1955

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

Proceedings of the Iowa Academy of Science

No abstract provided.

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Coal Spoil-Bank Materials As A Medium For Plant Growth, Dean W. Einspahr, A. L. Mccomb, F. F. Riecken, W. D. Shrader Jan 1955

Coal Spoil-Bank Materials As A Medium For Plant Growth, Dean W. Einspahr, A. L. Mccomb, F. F. Riecken, W. D. Shrader

Proceedings of the Iowa Academy of Science

The use of draglines and mechanical shovels to uncover and remove coal from surface mines has greatly increased in importance in the last 20 years. Strip mining, as this is called, has resulted in a greater per man day coal production and a greater percentage recovery of coal. Along with this increased production and increased efficiency in the use of one resource there occurs a change in the use capability of land mined for coal.

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A Drumlinoid Hill, Story County, Iowa, L. A. Thomas, K. M. Hussey, C. J. Roy Jan 1955

A Drumlinoid Hill, Story County, Iowa, L. A. Thomas, K. M. Hussey, C. J. Roy

Proceedings of the Iowa Academy of Science

This is a brief report on an interesting hill occurring on the Cary drift plain in central Story County. The hill is situated in sections 7 and 8, T. 84 N., R. 22 W., about four miles north of Nevada. It forms a conspicuous, isolated prominence in an area of several square miles of relatively featureless drift plain. The hill is about two miles long, and one-quarter mile wide. The long axis is directed northwest-southeast with an essentially even crest line. The maximum height of the hill above the adjacent plain is about 60 feet as shown on a profile …

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The Bender Visual-Motor Gestalt Test As A Measure Of Aggression In Children, James R. Taylor, Lowell W. Schenke Jan 1955

The Bender Visual-Motor Gestalt Test As A Measure Of Aggression In Children, James R. Taylor, Lowell W. Schenke

Proceedings of the Iowa Academy of Science

The Bender-Gestalt Test has been routinely used for the past two years at the Annie Wittenmyer Home, an institution for dependent and neglected children in Iowa. This simple test was first designed by Bender (1938), as a performance test for young children. Her manual also indicates that the test can be used in the differentiation of organic brain anomolies, schizophrenias and psychoneuroses. This area of research has been covered by Hutt (1945) Swenson and Pascal (1953), Guertin (1954), and others. The observations of the writers have indicated that there is a wide difference in the way apparently normal children respond …

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The Influence Of Growth Rate Upon Brain Development In Rana Pipiens Tadpoles., Jerry J. Kollros, Stephanie Henoch Barch Jan 1955

The Influence Of Growth Rate Upon Brain Development In Rana Pipiens Tadpoles., Jerry J. Kollros, Stephanie Henoch Barch

Proceedings of the Iowa Academy of Science

In the course of studies on the development of the optic tectum in the frog (Kollros, '53), considerable variation in the cell populations of the outermost tectal layers was noted, with some involvement of the deeper layers as well. The greatest differences appeared toward the end of metamorphosis, with cell counts in some animals being 30 to 40 per cent less than those in others. The animals with low counts were generally smaller than those with the high counts, and frequently they grew more slowly. In order to study the variations in tectal development which might be associated with variations …

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Some Responses Of Chickens To Infection With Plasmodium Lophurae, Delma E. Harding Jan 1955

Some Responses Of Chickens To Infection With Plasmodium Lophurae, Delma E. Harding

Proceedings of the Iowa Academy of Science

The strain of Plasmodium lophurae, malaria parasite, used in this investigation was one which had been received in 1947 from an infected duck supplied by the Rockefeller Institute of Princeton, New Jersey. It was maintained by transmitting it serially through young White Pekin ducks.

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Response Strength As A Function Of Delay Of Reward And Physical Confinement, Peter Lynn Carlton Jan 1955

Response Strength As A Function Of Delay Of Reward And Physical Confinement, Peter Lynn Carlton

Proceedings of the Iowa Academy of Science

A number of recent investigations have been concerned with the study of the effect of varying the length of delay of reward and of shifting this delay period on level of performance in instrumental conditioning (1, 2, 5, 6, 7, 8, 9, 11) . In general, these studies have found level of performance at the asymptote to be some inverse function of the time of delay and that the length of delay that will still provide for learning appears to be a function of the effectiveness of secondary reinforcement in the situation (1, 6, 7, 10).

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1955 Old Gold, Iowa State Teachers College Jan 1955

1955 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.

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Observations On Seeds Of The Leguminosae: Mimosoideae And Caesalpinioideae, Duane Isely Jan 1955

Observations On Seeds Of The Leguminosae: Mimosoideae And Caesalpinioideae, Duane Isely

Proceedings of the Iowa Academy of Science

Although largely neglected in many taxonomic studies, seeds have been found to yield valuable diagnostic characters. This is true not only at the level of genera and species (e.g. Murley 1946, 1951), but in considering the characteristics of plant families (e.g. Isely 1947, Martin 1946). In connection with an investigation of the Mimosoideae and Caesalpinioideae of the north-central states, seeds of the species under consideration were studied, and · a key based on seed characters prepared (Isely 1955). An extension of these investigations to other species and genera has resulted in the present report. Many of the observations discussed are …

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A Revision Of The Gasteromycetes Of Iowa, Jasper H. B. Garner Jan 1955

A Revision Of The Gasteromycetes Of Iowa, Jasper H. B. Garner

Proceedings of the Iowa Academy of Science

The term Gasteromycetes was first used by Elias Fries in his Systema Mycologicum (1821-29) to designate the class in which were included only those fungi which produce their spores within a closed sporocarp. The use of the closed sporocarp as the chief characteristic for setting off the group from the other fungi led him to include some Myxomycetes and some Ascomycetes, both nongasteromycetous groupings. Today the term is used to denote the heterogeneous assemblage of higher Basidiomycetes in which the spores are formed within a closed basidiocarp. Dehiscence of the basidiocarp may or may not occur. In those instances in …

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The Relationship Between Manifest Anxiety And Test Anxiety, William H. Lyle, Charles D. Smock Jan 1955

The Relationship Between Manifest Anxiety And Test Anxiety, William H. Lyle, Charles D. Smock

Proceedings of the Iowa Academy of Science

Anxiety as an important determinant of behavior has been receiving increasing attention from both the clinician (5, 6, 15, 19, 23) and the experimental psychologist ( 2, 4, 8, 21) . Several measures of anxiety have been developed (6, 7, 9, 22) in order to study the relationship between anxiety as a personality variable and behavior in a variety of experimental situations. The purpose of this investigation was to study the interrelationships among three of the more widely used anxiety scales. Normative characteristics of the scales for the population sample will also be presented.

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Problems Of Origin And Early Development Of The Vertebrates: Skeletal Tissues, George M. Robertson Jan 1955

Problems Of Origin And Early Development Of The Vertebrates: Skeletal Tissues, George M. Robertson

Proceedings of the Iowa Academy of Science

For the past thirty years one of my major interests has been Organic Evolution, and coupled with that for most of this period has been Vertebrate Paleontology, with special emphasis on the earliest vertebrates. Taxonomic study of these primitive forms has been bound to lead to phylogenetic speculation, and of recent years that aspect has dominated my interest. At the same time I have become increasingly concerned with problems of the mode or modes of occurrence of evolutionary changes. Merging these two has given rise to some serious problems.

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Notes On Tetracotyles Within Echinostome Rediae From The Okoboji Region, Martin J. Ulmer Jan 1955

Notes On Tetracotyles Within Echinostome Rediae From The Okoboji Region, Martin J. Ulmer

Proceedings of the Iowa Academy of Science

The great abundance of snails parasitized by larval stages of digenetic trematodes in the Okoboji region in northwest Iowa makes this area a particularly interesting one for helminthological investigations. Lymnaea reflexa (Say), an aquatic snail found in large numbers in ponds near the Lakeside Laboratory on West Lake Okoboji, show a remarkably high percentage of infection with strigeid metacercariae of the tetracotyle type. In some areas, collections of several hundred snails showed upon examination that 100 per cent were parasitized with developing and fully formed tetracotyles. These metacercariae, which are usually present in great number within the hermaphroditic gland of …

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Food Of The Freshwater Drum, Aplodinotis Grunniens Rafinesque, In Four Dickinson County, Iowa, Lakes, Tom Moen Jan 1955

Food Of The Freshwater Drum, Aplodinotis Grunniens Rafinesque, In Four Dickinson County, Iowa, Lakes, Tom Moen

Proceedings of the Iowa Academy of Science

The freshwater drum, Aplodinotus grunniens Rafinesque, better known throughout most of the midwest as sheepshead, is the only member of the family Sciaenidae in the midwest. This species has been the object of many arguments among fishermen as to whether it should be classed as a game fish or relegated to the rough fish group (carp, buffalo, gar -and etc.). Although sheepshead often take both artificial and live bait, it is the present policy of the fisheries management section of the Iowa Conservation Commission that the competitive aspects of this species outweigh any gain in food or sport that might …

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Observations Of The Enteric Protozoa Of Rana Pipiens During Larval Development And Metamorphosis, William Henry Mcarthur Jan 1955

Observations Of The Enteric Protozoa Of Rana Pipiens During Larval Development And Metamorphosis, William Henry Mcarthur

Proceedings of the Iowa Academy of Science

The existence of protozoa in the intestine of frogs has been known since the observations of van Leeuvenhoek, 1683. Nearly two centuries elapsed before any considerable advance in the study of intestinal protozoa was made. The observations of Dobell ( 1909) initiated the modem phase in the investigation of the enteric protozoa of amphibia. In this work, on the fauna of frogs and toads, many of the species now recognized were described.

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Notes On Iowa Rusts, John W. Baxter Jan 1955

Notes On Iowa Rusts, John W. Baxter

Proceedings of the Iowa Academy of Science

This paper reports the results of experiments with two heteroecious species of the Uredinales occurring on prairie grasses in Iowa. Aecidium yuccae Arth. is shown to be connected with Puccinia amphigena Diet., and evidence is presented indicating a connection between Aecidium aesculi E. & K. and Puccinia andropogonis Schw. This paper also records the occurrence in Iowa of Puccinia amphigena Diet. and Puccinia flaccida B. & Br. A check of lists compiled by Arthur (1926), Gilman and Archer (1929) and Gilman (1931, 1949) has shown that these species have not been reported from the state.

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Growth Of Kidney Beans After Cotyledon Pruning, B. E. Michel Jan 1955

Growth Of Kidney Beans After Cotyledon Pruning, B. E. Michel

Proceedings of the Iowa Academy of Science

The determination of the relation of seed weight to the growth, development, and yield of plants has been the purpose of many investigations. These have been adequately reviewed elsewhere (7, 9, 11). Two sets of observations stimulated this study. In 1951 (10) the author suggested that one possible explanation of inhibition of epicotyl growth as a result of indoleacetic acid application to the hypocotyl might be the diversion of food stored in the cotyledons from the epicotyl to the hypocotyl coupled with an inability of the cotyledons to increase their rate of supply. While a critical examination of this question …

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Proactive Interference As A Function Of Amount Of Original Training, Alfred Castaneda Jan 1955

Proactive Interference As A Function Of Amount Of Original Training, Alfred Castaneda

Proceedings of the Iowa Academy of Science

The condition where S must successively learn two responses to the same stimulus has been assumed to provide optimal conditions for generating interference during the learning of the second response. The empirical evidence in support of this assumption is not strong. When compared to a control group this condition tends only to result in fewer correct responses in the early stages of relearning. In addition, this tendency is observed only for lower levels of training on the first task for, with increases in training it diminishes until eventually facilitation is clearly evident. Recently, however, Porter and Duncan (5) following a …

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1955 Little Panther, Iowa State Teachers College High School Jan 1955

1955 Little Panther, 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).

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B-Vitamins Stimulatory To Cellulose Digestion By Washed Suspensions Of Rumen Microorganisms, Glen Hall, Edmund W. Cheng, Wise Burroughs Jan 1955

B-Vitamins Stimulatory To Cellulose Digestion By Washed Suspensions Of Rumen Microorganisms, Glen Hall, Edmund W. Cheng, Wise Burroughs

Proceedings of the Iowa Academy of Science

Numerous investigators have reported the presence of unidentified factors in certain feedstuffs and other materials which stimulate rumen microbial activity in vitro (1, 2, 3, 6, 8, 9, 10). Recently Ruf et al. (11) showed that extracts of yeast, cow manure and several feedstuffs stimulated the rate of cellulose digestion when they were added to a purified medium used for the in vitro culture of rumen microorganisms. Since many of the sources of the unidentified factors are known to contain several vitamins of the B group, it appears desirable to study the influence of certain of these vitamins on the …

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Right-Left Discrimination And Finger-Localization In Normal And Brain Injured Subjects, Arthur L. Benton, Bertram D. Cohen Jan 1955

Right-Left Discrimination And Finger-Localization In Normal And Brain Injured Subjects, Arthur L. Benton, Bertram D. Cohen

Proceedings of the Iowa Academy of Science

Right-left discrimination and finger-localization are perceptual skills of considerable clinical interest because impairment in these abilities is sometimes encountered in patients with cerebral disease (2). With the rather gross methods employed in the typical clinical neurological examination, isolated impairment in right-left discrimination or finger-localization does not appear to be a frequent finding in adult patients with cerebral injury or disease. This is not altogether surprising when it is realized that the responsible cerebral lesion is almost invariably to be found in the dominant cerebral hemisphere. A frequent consequence of such a lesion is, of course, an aphasic disorder which is …

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