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The Bluegill, Lepomis Macrochirus (Rafinesque) In West Okoboji Lake, Iowa, James Mayhew

Proceedings of the Iowa Academy of Science

In past years the life histories of almost all our common game and rough fishes have been studied. The knowledge of age, growth, condition, food consumed, reproductive potentials, and population dynamics arc basic fundamentals in modern fisheries biology. This study is concerned with the angler harvest, age and growth, body-scale relationship, length-weight relationship, coefficient of condition, population trends, spawning activities, and fecundity of the northern bluegill (Lepomis macrochirus) in West Okoboji Lake, Iowa.

Reports: The Secretary-Treasurer; Financial Statement; The Board Of Directors; Revised Constitution And By-Laws; Staff Reports; Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

Carver Science Hall, David G. Mobberley

Proceedings of the Iowa Academy of Science

Simpson College, Indianola, Iowa, will dedicate Carver Science Hall on the occasion ·of its third annual Christian Liberal Arts. Festival, October 6, 1956. This building venerates one of Simpson's most distinguished former students, George Washington Carver. In paying homage to the memory of Dr. Carver, Simpson adds its name to the list of those who recognize the richness and warmth of this great and dedicated human spirit. The connection between Carver and Simpson is well known and there is no need to retell that chapter in his life -story here. But succinctly to emphasize that relationship, no words could be …

The Control Of Poison Ivy, A. L. Bakke, E. P. Sylwester

Proceedings of the Iowa Academy of Science

Poison ivy (Rhus radicans L.) is a woody perennial, reproducing by seeds and creeping root stalks. It is found in rocky fields, pastures, fence rows, on roadsides, railroad embankments, under telephone lines, and in rich alluvial woodlands. Poison ivy is native in Iowa and widespread throughout the United States and Canada. Earliest mention of poison ivy was made by Captain John Smith in 1609. J. P. Cornut described the plant in his work on Canadian plants in 1635. It has been shown that as many as 26 different kinds of birds arc responsible for the wide dissemination of poison ivy.

The Distribution Of C14 Labelled Salicylates In Rat Tissues, Esther M. Burnham, W. D. Paul, J. I. Routh

Proceedings of the Iowa Academy of Science

During the period of development of salicylate therapy, it was demonstrated that many body membranes were permeable to salicylates, and that appreciable quantities were excreted in the urine. With the development of a satisfactory quantitative method by Brodie et al. (1) the salicylate concentration in body fluids and urine could be determined. More recently the successful labelling of salicylates with C¹⁴ has placed investigation of salicylate distribution in animal tissues on a more practical basis. The carboxyl group of salicylic acid (2) (3) (4) and the acetyl group of acetylsalicylic acid (5) have been tagged with radioactive carbon. These …

Some Shallow Earth-Resistivity Measurements In Iowa, Howard R. Dixon, Theodore L. Welp

Proceedings of the Iowa Academy of Science

The Materials Department of the Iowa State Highway Commission has been experimenting with the electrical earth-resistivity method of geophysical exploration. During the summer of 1955 a full time crew ran extensive tests over various selected locations throughout the state of Iowa. The purpose of this investigation was to evaluate and demonstrate the use of earth resistivity in preliminary subsurface reconnaissance by providing subsurface information useful in determining location, design, and construction of highways. Experiments were made with both the depth profiling and the constant depth resistivity traverse methods of field operation. Three methods were used for analysing the field data: …

Wing Venation In The Adephaga And Its Contribution To Phylogeny, Edwin W. King

Proceedings of the Iowa Academy of Science

It has been assumed for some time that the adephagous beetles, with the possible exception of the Rhysodidae, constitute a relatively homogeneous group. This assumption is not challenged here; the purpose of the present preliminary study is to examine certain evidence drawn from the wing venation of the most generalized (venationally) available species in an attempt to ascertain possible trends in venation among the various families. The scope of the material examined, as well as the species ultimately selected as being the most generalized in their respective families, are tabulated below.

Abbreviated Larval Period Of Rana Catesbeiana In Iowa, Joseph T. Bagnara, Jerry J. Kollros

Proceedings of the Iowa Academy of Science

It has long been reported that the larval period of Rana catesbeiana in the North lasts for two years (Pope, '47, Wright and Wright, '49, Smith, '50). Examination of tadpoles from such ponds indicates that two age classes are present. The two groups result from the fact that eggs are deposited every year while tadpoles transform only after their second winter. In the light of this information, we were quite surprised to find bullfrog tadpoles apparently of only one age group in Iowa City. 1 In view of this general information, it seems possible that bullfrog tadpoles in this vicinity …

A Note On Epicoccum, John J. Ellis

Proceedings of the Iowa Academy of Science

On 27 September, while making isolations from corn stalks collected near Iowa City, a fungus of the genus Epicoccum was isolated from a short section of stalk which had been put into a moisture chamber on September 22. The same fungus has been isolated 3 times from corn stalks since then. Attempts to determine the species led to a realization of the uncertainty concerning the species in this genus and the inadequacy of the descriptions and illustrations. The fungus under discussion was at first determined as Epicoccum neglectum Desm. (Ann. Sci. Nat. Bot. II. 17: 95. 1842); however. Damon (1953) …

Growth And Other Physiological Responses To Diethylstilbestrol In Diet Of Rats And Guinea Pigs, Rodney Preston, Edmund Cheng, Wise Burroughs

Proceedings of the Iowa Academy of Science

Recent studies have shown that the inclusion of diethylstilbestrol (stilbestrol) in rations of fattening beef cattle (1) and lambs (2) results in stimulation of liveweight gains and improvement of overall feed utilization in these species of animals. The physiological explanations for this action of stilbestrol are not apparent at this time since no such stimulation from stilbestrol has been noted in other species of animals. In studying the mode of action of stilbestrol in fattening beef cattle and lambs, it seemed desirable to first study the growth responses of certain laboratory animals (rats and guinea pigs) to see if they …

Relationship Between Particle Size And Potassium Release In The Clarion And Marshall Soils, Raymond B. Daniels

Proceedings of the Iowa Academy of Science

A study by Lawton and Pierre (1946) of different soil types in Iowa and their potassium availability showed that the Marshall series were consistently higher in exchangeable potassium than the Clarion series. The Marshall series is developed in Wisconsin loess and is classified as a Medial Brunizem. The Clarion series is developed in Cary and Mankato till and is classified as a Minimal Brunizem. The Marshall series is dominantly a silty clay loam, whereas the Clarion series is dominantly a loam. Pratt and Morse (1954) found, when they grouped several Ohio soils by areas, the potassium release was lowest from …

Annual Report Of The Registrar 1955-1956, University Of Northern Iowa

Institutional Effectiveness & Planning Documents

Contents:

--- Comparisons Worth Noting
--- Summary of Attendance
--- Attendance by Quarters
--- Full-Time Equivalency Enrollment
--- Degrees Granted 1955-56
--- Summary of Veterans Attendance
--- Pupils in the Campus and Affiliated Schools 1955-1956

A Checklist Of The Vascular Flora Of Poweshiek County, Iowa, Norman H. Russell

Proceedings of the Iowa Academy of Science

In spite of the fact that Poweshiek County has been the collecting ground for such eminent professional or amateur botanists as H. W. Norris, Frank W. Johnson, and Henry S. Conard, no list of county plants, verified by herbarium specimens, has yet appeared in print. In addition, references to plants of Poweshiek County in the various papers on different genera in Iowa have been very scarce. The first edition of the "Grinnell Flora" by H. S. Conard was a list of the plants, both wild and cultivated, of Grinnell and "vicinity_," but the geographical limits of its coverage are uncertain. …

Mosses And Liverworts Of Iowa, Henry S. Conard

Proceedings of the Iowa Academy of Science

In 1945 I published three papers on the Atracheata (Bryophytes) of Iowa in The Bryologist, vol. 48:I. The species and the counties from which they were known, with the herbaria in which specimens could be seen. II. Names that have been published but were not recognized in my list, and why not. III. Papers on the subject, with notes about the authors. Since that time several additional species have been collected in the State, many new county records have been made, some misidentifications are to be corrected, and some changes in names must be made. As I am not likely …

A Kame Field Of Iowan Age In The Vicinity Of Grand Mound And De Witt, Clinton County, Iowa, Sherwood D. Tuttle

Proceedings of the Iowa Academy of Science

Numerous low mounds of irregular shape in the v1cm1ty of Grand Mound and De Witt, Iowa, are glacial features coming under the category of kames. Twenty-two kames have been identified within an oblong area about two or three miles wide and 12 miles long, lying immediately south of the Chicago, Northwestern railroad and U. S. Highway 30 (see Figure l). The area extends eastward from about two miles east of the town of Calamus, passing south of the town of Grand Mound and continuing two miles southeast of the city of De Witt. Parts of the kame field lie in …

The Effect Of Stimulus Intensities Upon Sensory Pre-Conditioning, Givens L. Thornton

Proceedings of the Iowa Academy of Science

The phenomenon of sensory pre-conditioning was noted originally by Brogden (3) and, for the purpose of this study, may be described in three parts as follows. In part one, Ss are presented with a number of simultaneous pairings of two neutral stimuli, e.g., bell and light. Following this, one stimulus, for example the bell, is made the CS for an avoidance response. Part three consists of presenting the other stimulus (light) for the purpose of determining to what extent it also will elicit the same response as a result of its prior association with the first.

Kitty Hawk 1894, Robert Frost

James Hearst Documents

The poem Kitty Hawk 1894 by Robert Frost sent as a Christmas greeting in 1956. Woodcut illustrations by Antonio Frasconi.

Title Page - Front Matter

Proceedings of the Iowa Academy of Science

No abstract provided.

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

In Memoriam: Kate Daum; Kenneth M. Krezek; John Thomas Mcclintock; H. Earl Rath

Proceedings of the Iowa Academy of Science

No abstract provided.

Invited Address: Scientists And The Public, U. A. Hauber

Proceedings of the Iowa Academy of Science

An essay on Science and Religion prepared in connection with the Presidential Address to the Iowa Academy of Science delivered at Grinnell Iowa. April 20, 1956.

Nomination Of R. B. Wylie For Honorary Fellow

Proceedings of the Iowa Academy of Science

No abstract provided.

Invited Address: The Science Teacher Improvement Program Of The Aaas, Harold E. Wise

Proceedings of the Iowa Academy of Science

During recent years it has become increasingly apparent that even in the midst of an economic era which is plagued by surpluses of many commodities, the United States is experiencing a critical shortage of scientists and engineers with the training essential to our expanding technical civilization and to our national security.

Techniques For Species Comparison In Violets, Norman H. Russell

Proceedings of the Iowa Academy of Science

In the course of research on the taxonomy and evolution of various species of violets during the past ten years several techniques have been used which have proven effective in comparison of total species differences among wild violets. Two of these techniques are described below.

The Flora Of The Pine Hill Prairie Relict, Thomas Morrissey

Proceedings of the Iowa Academy of Science

The purpose of this paper is to describe one of the few remaining tracts of virgin prairie in eastern Iowa. The Committee on Conservation of the Iowa Academy of Science, particularly in the reports of Dr. Ada Hayden (1945, 1946), has urged the preservation of native Iowa grasslands in order that they may serve as natural out-of-doors laboratories for the study of ecological and taxonomic problems. A flora of the kind presented here may be of value when compared to grasslands in the eastern and western states: It may help determine the effect of environmental forces which vary in different …

A Summer Travel Course In Field Natural History, Martin L. Grant

Proceedings of the Iowa Academy of Science

The most interesting, informative, and profitable course taken by the writer as an undergraduate (at Oberlin College) was a travelling field course through the northwestern states led by Dr. Lynds Jones, Professor of Ecology. In direct imitation of this, a similar course was conducted in the summer of 1955 by Iowa State Teachers College, which covered 6,600 miles, from Cedar Falls to the northwest corner of the state of Washington, through the Badlands and Black Hills, and Yellowstone, Glacier, Mt. Rainier and Olympic Parks, returning by way of the Oregon coast, Crater Lake, northeastern California, Great Salt Lake, Dinosaur Monument, …

Keys To The Iowa Species Of Calvatia And Lycoperdon, Jasper H. B. Garner

Proceedings of the Iowa Academy of Science

The starting point in the nomenclature of the Gasteromycetes is Persoon's Synopsis A1 ethodica Fungorum of 1801. Many of the specimens on which Persoon based his descriptions are in his herbarium, which is now in the Rijksherbarium at Leiden, Netherlands. Perdeck (1950), as a result of his study of Persoon's herbarium, made some name changes in an attempt to clear up some of 1 he nomenclatoral confusion existing in the Lycoperdaceae. In a previous paper Garner (1955) incorporated these changes in making a revision of the genera Calvatia and Dycoperdon as treated by Kambly and Lee (1936) in "The Gasteromycetes …

Noxious Weed Seeds In Iowa Oats And Red Clover Samples, L. E. Everson

Proceedings of the Iowa Academy of Science

T

The present study is based on the occurrence of noxious weed seeds in oat and red clover seed samples submitted to the seed laboratory by Iowa farmers for seed testing. Extension workers and farmers may find this information helpful in planning local weed control programs. It may also be of value to seedsmen and farmers who purchase local seed, but wish to avoid seed lots containing noxious weed seeds.

Cultural Practices And Test Weight In Oats, K. J. Frey, S. C. Wiggans

Proceedings of the Iowa Academy of Science

Of the several criteria of seed quality in oats, weight per bushel, or test weight, is most universally used. The standard test weight for oats is 32 pounds per bushel, but with present-day varieties and production practices, oats produced in the Corn Belt often exceed this value by from 3 to 6 pounds. The oat seed characteristics which have been found to be correlated with test weight arc: hull percentage, seed shape and size and plumpness and density of the caryopsis. Test weight in oats has been proven to be an inherited characteristic. Barring diseases such as rust, which may …

A Method For Determining Stem Canker Resistance In Soybean, John M. Dunleavy

Proceedings of the Iowa Academy of Science

Stem canker disease of soybean is caused by the fungus, Diaporthe phaseolorum var. caulivora, and at present there are no soybean varieties known to be highly resistant to this disease. Stem canker takes its name from the resemblance of the discolored area of an infected stem to a canker. As the infected area on a stem enlarges, the stem is girdled and the portion of the plant above the girdled area is killed. Stem canker seriously affects soybeans in the northcentral region of the United States and has been reported to cause heavy losses (Athow and Caldwell, 1954; and Dunleavy, …