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Mosses And Liverworts Of Iowa, Henry S. Conard
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 Program For Dutch Elm Disease Control On The Iowa State College Campus, Harold S. Mcnabb Jr.
A Program For Dutch Elm Disease Control On The Iowa State College Campus, Harold S. Mcnabb Jr.
Proceedings of the Iowa Academy of Science
The formation of a model control program as a guide for Dutch elm disease control in Iowa seems advisable when the recent spread of the disease is considered. Such a control program, with the campus of Iowa State College taken as the physical area, is the main objective of this paper. lt also illustrates the part local biology classes and service organizations can do in an undertaking of this kind. There are five main activities included in a sound Dutch elm disease control program. These are education, evaluation, maintenance, sanitation, and spraying.
Blood Lipids In Progressive Muscular Dystrophy, R. L. Dryer, A. R. Tammes, J. I. Routh, W. D. Paul
Blood Lipids In Progressive Muscular Dystrophy, R. L. Dryer, A. R. Tammes, J. I. Routh, W. D. Paul
Proceedings of the Iowa Academy of Science
Muscular dystrophy is a heredofamilial disease characterized by primary degeneration of certain groups of voluntary muscles. Although several forms of the disease are recognized clinically the basic metabolic defect is probably the same in all cases, regardless of the outward manifestations. In many instances it appears that the genetic defect is sex-linked, while in others it is not. All of the members of a given family may not show the obvious signs of disease, but if a careful study is made the non-affected members often show more or less subtle and asymptomatic defects which may be characterized as abortive forms …
The Use Of The Didymium Filter For Wavelength Calibration In Spectrophotometry, Robert S. Melville
The Use Of The Didymium Filter For Wavelength Calibration In Spectrophotometry, Robert S. Melville
Proceedings of the Iowa Academy of Science
One of the first problems in the installation of any new spectrophotometer is the verification of the wavelength calibration. There are several methods available for this procedure. For standardization each method employs some source of monochromatic light of a specific wavelength.
Purified Ration Studies With Lambs, W.H. Hale, Wise Burroughs
Purified Ration Studies With Lambs, W.H. Hale, Wise Burroughs
Proceedings of the Iowa Academy of Science
The results reported in this paper are attempts to evaluate several dietary factors in the development of a purified ration for lambs that will give growth rates similar to those obtained on natural rations.
A Kame Field Of Iowan Age In The Vicinity Of Grand Mound And De Witt, Clinton County, Iowa, Sherwood D. Tuttle
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 …
Characteristics Of Some Soils Of The Iowan Till Area Of Northeast Lowa, E. M. White, F. F. Riecken
Characteristics Of Some Soils Of The Iowan Till Area Of Northeast Lowa, E. M. White, F. F. Riecken
Proceedings of the Iowa Academy of Science
The published county soil surveys show that Carrington loam and silt loam soils occur extensively in the CC and CKC areas of northeast Iowa outlined in Figure 1. Most of these soil surveys were made from 1914 to 1930, and as pointed out by Simonson, Riecken and Smith ( 1952), the former Carrington series in this area is now considered to consist of several series. In the present study several morphologically different profiles formerly included with the Carrington loam and silt loam soil types were sampled and certain laboratory determinations made. The data obtained and a brief discussion of their …
What Helps A Physicist Grow?, E. M. Vaughan
What Helps A Physicist Grow?, E. M. Vaughan
Proceedings of the Iowa Academy of Science
What helps a physicist grow? This question and a very good answer appeared in a recent issue of Physic Today. The answer in case you didn't sec it was given by Eaton H. Draper of AVCO. "Top level associates, freedom from routine, and technically sophisticated assignments are all vital. But the one most important factor is a climate which encourages a healthy questioning of the known, as well as the unknown. Given this a scientist or physicist will perform at his peak, and beyond." He needs says Mr. Draper, "An atmosphere of inquiry." It is important that this atmosphere be …
First Forty Years Of The Iowa Section Of The Mathematical Society Of America; Iowa Section By-Laws, Fred Robertson
First Forty Years Of The Iowa Section Of The Mathematical Society Of America; Iowa Section By-Laws, Fred Robertson
Proceedings of the Iowa Academy of Science
When an organization celebrates its 40th year it is a good time to review the accomplishments and failures of the past, and to investigate ways to build for the future. Just 40 years less one week and one day the organizational meeting of "The Mathematical Association of America" was held in room 19 Memorial Hall, Drake University on April 28, 1916 in response to a call made by the general assembly of the "Iowa Academy of Science". Thus the Iowa Academy of Science may be said to sponsor the Iowa Section of the Mathematical Association of America and the ties …
Forming Impressions Of Personality: An Experimental Critique, Harry A. Grace
Forming Impressions Of Personality: An Experimental Critique, Harry A. Grace
Proceedings of the Iowa Academy of Science
Asch's recent text (2) emphasizes his experiment on the formation of impressions (1). Asch read seven words to two groups of subjects. The fourth word for Group A was warm and the fourth for Group B was cold. The order of the words for both groups was: intelligent, skillful, industrious, warm (cold), determined, practical, cautious. After the list had been read, subjects were instructed to choose the more appropriate word from each of 18 pairs of antonyms. The percentage of agreement with the "positive" word of each pair of antonyms was determined for both groups. Groups A and B differed …
The Role Of Special Instructions In The Successive Performance Of Different Tasks On The Star Discrimeter, Stephanie Pisoni, Allan R. Wagner
The Role Of Special Instructions In The Successive Performance Of Different Tasks On The Star Discrimeter, Stephanie Pisoni, Allan R. Wagner
Proceedings of the Iowa Academy of Science
The problem was to determine the facilitating and/or interfering effects of knowledge concerning the kinds of change that might be made in shifting from a perceptual-motor task that has just been learned to a subsequent interpolated task. The experimental design called for original learning (OL), interpolated learning (IL), and relearning (RL) phases of practice, with the period for informative instructions coming between the OL and IL phases. Task A was used for OL and RL and either Task B or Task J for IL. Familiarity with the principal features of the tasks will help in explaining the problem.
Response Strength As A Function Of Alley Length And Time Of Deprivation, Norma C. Fredenburg
Response Strength As A Function Of Alley Length And Time Of Deprivation, Norma C. Fredenburg
Proceedings of the Iowa Academy of Science
The present study has been formulated to test Hull's assumption of differential formation of habit strength of the initial S-R components of response chains of different length. A factorial design with two lengths of alley and 1\Hl times of food deprivation was employed. From the assumptions of 1) differential drive based upon food privation, 2) differential habit based upon alley length, and 3) the multiplicative relationship between drive level and habit strength, a larger difference between the response strengths for long and short chains would he predicted for the high drive groups than for the low drive groups. Incidental to …
Age And Handedness As Factors In The Performance Of A Complex Pursuit Task: Results Of A Study At The Iowa State Fair, Guy H. Miles, Don Lewis
Age And Handedness As Factors In The Performance Of A Complex Pursuit Task: Results Of A Study At The Iowa State Fair, Guy H. Miles, Don Lewis
Proceedings of the Iowa Academy of Science
In connection with systematic studies of the underlying variables which affect the learning and retention of complex skills, it has been found that certain patterns of response-the steering and pointing patterns, in particular--are firmly ingrained in the average person before adulthood is reached. They are so rigidly fixed that alterations of them are extremely difficult to produce in reasonable lengths of time, under laboratory conditions. They depend on a high degree of coordination of perceptual and motor components of behavior, and are presumably acquired during many years of reinforced practice. Steering left when turning right is desired is seemingly as …
Relationships Between Number Of Verbal Associations To Value Words And Subjective Ratings Of Values, Alice Van Krevelen
Relationships Between Number Of Verbal Associations To Value Words And Subjective Ratings Of Values, Alice Van Krevelen
Proceedings of the Iowa Academy of Science
This study attempts to demonstrate whether or not there is a relationship between Ss' rankings of statements descriptive of Spranger's values and the number of verbal associations made by the same Ss to nouns referring to these values. Noble (2) has demonstrated that one may define the meaningfulness of a stimulus word in terms of the number of associations to this word written by Ss within a prescribed time. Bousfield and Samborski (1) using the written association method of Noble attempted to test the hypothesis that for individuals the relative strength of personal values should correlate positively with the extent …
Comparing Inventory Items By Use Of Ibm Punch Cards, Virtus W. Suhr
Comparing Inventory Items By Use Of Ibm Punch Cards, Virtus W. Suhr
Proceedings of the Iowa Academy of Science
Extensive analysis of specific inventory-item information on large numbers of any extended form by ordinary methods would be practically impossible due to the volume and labor involved. To overcome this obstacle it is necessary to put the data into a form in which large numbers of completed inventories can be item analyzed easily and quickly but without losing completeness and individuality. A system using IBM punch cards seemed to meet all of these conditions when a counting or statistical sorter is available. The IBM punch card, as shown in Figure 1, is known to most research workers. Data, after having …
Validation Of The Grassi Block Substitution Test For Measuring Brain Pathology, Michael Hirt
Validation Of The Grassi Block Substitution Test For Measuring Brain Pathology, Michael Hirt
Proceedings of the Iowa Academy of Science
The human brain is most vulnerable from two sources of damage: external trauma and chemical reactions. We now recognize and distinguish two types of symptoms following brain damage: neurological and psychological. In this study emphasis will be placed upon the psychological behavior of the individual. This is justified with the understanding that the psychological behavior will reflect to some extent the neurological changes which might have occurred in the brain. Furthermore, the concern in this study is with that part of behavior which is evoked whenever there is organic involvement and to which it is possible to apply accepted psychometric …
Some Observations On Regeneration In Dileptus Anser, Paul A. Meglitsch, Thomas Johnson
Some Observations On Regeneration In Dileptus Anser, Paul A. Meglitsch, Thomas Johnson
Proceedings of the Iowa Academy of Science
One of the most interesting capacities of protozoans is their ability to replace lost parts following injury. Although they are structurally the equivalent of cells they are functional organisms, and a study of their behavior makes it possible to bring together concepts usually applied in the cellular field with those applied in the analysis of whole organisms. The same factors that operate to evoke a particular form in the whole organism must act in a small regenerating piece of a protozoan. Whether these factors are nuclear genes or protoplasmic organization, they act rapidly in the regenerating animal, regulating the form …
Standing Crops Of Fish In Iowa Ponds, Kenneth D. Carlander, Robert B. Moorman
Standing Crops Of Fish In Iowa Ponds, Kenneth D. Carlander, Robert B. Moorman
Proceedings of the Iowa Academy of Science
The fish populations of 42 Iowa ponds have been estimated for various reasons in the last 10 years by the Iowa Cooperative Fisheries Research Unit (Table 1). Although the data on some of the ponds have already been published (Fessler, 1950; Fredin, 1950; Carlander, 1951, 1952; Ruhr, 1952; Lawrence, 1952), it seems desirable to summarize the results. Most of the estimates were made by the marking and recapture technique. The pond was seined with a 50 to 70 foot seine and all fish were marked by clipping off a fin and were returned to the pond, until about one-third of …
Pheasant Nesting And Production In Winnebago County, Iowa, 1940 Versus 1954, Edward L. Kozicky, George O. Hendrickson
Pheasant Nesting And Production In Winnebago County, Iowa, 1940 Versus 1954, Edward L. Kozicky, George O. Hendrickson
Proceedings of the Iowa Academy of Science
The Iowa Cooperative Wildlife Research Unit has conducted research on the ring-necked pheasant (Phasianus colchicus) since 1935 on the Winnebago Research Area. From 1939-41 intensive nesting studies were made (Baskett, 1947) and again from 1950- 54. However, during this latter period, other investigations curtailed a complete nesting investigation, and it was not until 1954 (Klonglan, 1955) that time was available for a complete study with comparable spring pheasant populations. Since fall pheasant population levels in the 1939-41 period were estimated at 140 to 400 birds per section as compared to 100 to 110 birds from 1950-54, an intensive nesting study …
Nylon Vs. Linen Gill Nets At Clear Lake, Lowa, Richard L. Ridenhour, Charles J. Di Cóstanzo
Nylon Vs. Linen Gill Nets At Clear Lake, Lowa, Richard L. Ridenhour, Charles J. Di Cóstanzo
Proceedings of the Iowa Academy of Science
Reports that nylon gill nets fish more efficiently than linen or cotton gill nets led to the use of nylon netting for sampling fish populations at Clear Lake in 1953 (Carlander, 1953) . Since an increase in catch per unit effort was obtained with the nylon nets in 1953, both nylon and linen nets were fished in a comparative manner in 1954 and 1955 so that quantitative estimates of their relative efficiency could be made.
Abbreviated Larval Period Of Rana Catesbeiana In Iowa, Joseph T. Bagnara, Jerry J. Kollros
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 …
On The Half-Life Of Nests Of Formica Obscuripes Forel., R. L. King, R. M. Sallee
On The Half-Life Of Nests Of Formica Obscuripes Forel., R. L. King, R. M. Sallee
Proceedings of the Iowa Academy of Science
In these Proceedings for 1953 (p. 656) we discussed the duration of nets of Formica obscuripes Forel. We now have data for two additional years which establish certain facts only indicated earlier. The survey was started during the summer of 1945 on the grounds of the Iowa Lakeside Laboratory in Dickinson County, Iowa. Nests of the thatching ant were marked with metal tags on wire stakes and were plotted by compass readings from conspicuous features of the surroundings. The survey was repeated each summer; new nests were located and marked, and the loss of old nests recorded. The data are …
Types Of Mammalian Hibernation, Richard L. Farrand, G. Edgar Folk Jr., Marvin L. Riedesel
Types Of Mammalian Hibernation, Richard L. Farrand, G. Edgar Folk Jr., Marvin L. Riedesel
Proceedings of the Iowa Academy of Science
Mammalian hibernation is characterized by a reduction in metabolic activities and an increase in scrum magnesium (1). Although these similarities exist, there are also striking differences in the patterns of hibernation among mammalian types. This study describes three types of hibernation as observed in the golden hamster, the thirteen lined ground squirrel, and the bat. The major differences recorded in these three types of hibernators were concerned with the preparation for hibernation, the survival during hibernation, and the duration of domancy in deep hibernation. Overall results suggest that hibernation is harmful to the hamster after relatively long periods of cold …
Mammalian Predation On Mussels, Richard V. Bovbjerg
Mammalian Predation On Mussels, Richard V. Bovbjerg
Proceedings of the Iowa Academy of Science
The remarkable reproductive potential of fresh-water mussels bears testimony to their rigorous conditions of existence. The external fertilization, and the parasitic larval phase are biological hurdles to the realization of that potential, while the settling of the immature bivalves after leaving the fish host involves the many physical risks of molar action and unsuitable substratum. Predation and disease are usual factors acting to further reduce the life expectancy of any animal but few predators are capable of utilizing adult mussels as food. Crayfish scavenge on injured or dying mussels. A snail in the stream studied, Campeloma decisum Say considered a …
Author Index & Subject Index
Proceedings of the Iowa Academy of Science
No abstract provided.
Iowa State Teachers College Schedule Of Classes, Winter 1955-56, Iowa State Teachers College
Iowa State Teachers College Schedule Of Classes, Winter 1955-56, 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.
1956 Old Gold, Iowa State Teachers College
1956 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.
Annual Report Of The Registrar 1955-1956, University Of Northern Iowa
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
Officers, Past Presidents, And Members, Iowa Academy Of Science
Officers, Past Presidents, And Members, Iowa Academy Of Science
Proceedings of the Iowa Academy of Science
No abstract provided.
Notes On Rare Iowa Plants - Ii, Robert F. Thorne
Notes On Rare Iowa Plants - Ii, Robert F. Thorne
Proceedings of the Iowa Academy of Science
Much new information about the vascular plants of Iowa has resulted from three years of botanical exploration in various parts of the state since the first "Notes" were presented in 1953. Some of the more interesting results of the author's botanical gleanings in the period 1953-1955 have been published (Aikman and Thome 1956, Beal and Monson 1954, Cooperrider 1955a and 1955b, Grant and Thorne 1955, and Thome 1955.) Much more data, however, about species not previously reported from Iowa or rarely collected in the state should be placed on record for interested botanists. This information, with supplementary data from overlooked …