Digital Commons Network^™

Iowa's Contribution To American Men Of Science, H. E. Zabel

Proceedings of the Iowa Academy of Science

The latest edition of the Biographical Directory of Scientists lists 2623 who are now in Iowa or were formerly here. For every twenty-one of the present North American scientists, two are or were Iowans. Of these Iowans, 1110 were born in Iowa. Only six states have a larger number of native scientists. Of the outstanding or "starred" scientists, fifty-nine are native Iowans, a number exceeded by only five states. There is a native Iowa scientist for every 2275 of Iowa's present population, a ratio exceeded only by two states, each with a much smaller population, namely, Vermont and Utah.

Teaching Aids In Botany, Ii. Diagrams, S. M. Dietz

Proceedings of the Iowa Academy of Science

The use of prepared diagrams in general botany at the college level is a controversial subject. There is a general agreement that their use is economical of students' time but some instructors maintain that prepared diagrams curtail the opportunity for critical observation by the students. This paper does not purpose to deal with the controversy but rather to illustrate certain methods of effective use. During a period of ten years the Botany Department at Iowa State College has been experimenting with the use of prepared plates in the general botany course. In the beginning, four detailed drawings were, furnished. The …

The Solubility Of Cadmium Iodate In Aqueous Salt Solutions At 25° C, W. C. Oelke, Charles Wagner

Proceedings of the Iowa Academy of Science

The determination of the solubility of a slightly soluble salt such as cadmium iodate in different concentrations of salt solutions furnishes a good method for verifying solubility hypotheses. The solubility of cadmium iodate has been determined in potassium chloride solutions up to a concentration of 2.5 molal and in magnesium sulfate solutions up to 2.0 molal. The materials were prepared by methods similar to those used by Pearce and Oelke. ⁽¹⁾ Saturation was obtained by the shaker method. ⁽¹⁾ Analyses of the saturated solutions were made by using standard methods ⁽²⁾ and weight burets. The molal solubilities determined were plotted …

Aspects Of The Blood Alcohol Tests To Determine Intoxication, F. Earl Miller, R. W. Getchell

Proceedings of the Iowa Academy of Science

We have today definite, scientific methods for determining the degree of alcoholic intoxication of any individual. We commonly hear that some person can "hold his liquor" better than another. Alcohol must be absorbed into the bloodstream and carried to the brain where it acts as a depressant, to cause intoxication (2). Alcohol may be absorbed directly into the blood stream and its absorption is affected by a full or empty condition of stomach, strength of alcoholic beverage, rate of drinking, quantity of alcohol, and resistance to absorption such as might be found in the case of "tapers." Intoxication is therefore …

X-Ray Diffraction Studies On Nerve, R. S. Bear

Proceedings of the Iowa Academy of Science

A summary of the present knowledge of the composition and molecular structure of nerve tissue with particular reference to the application of X-ray technic to the problem.

Observations Upon Bogs Of Northern Iowa, Charles Carter

Proceedings of the Iowa Academy of Science

Observations upon bogs in the vicinity of the Okoboji Lakes in Northern Iowa were made in summers of 1936-37-38. The area was about thirty-five by twenty-five miles. The locations of these hogs are for the most part on the east or north slope of glacial hills in the Wisconsin and Iowan drift sheets. In general these bogs are rounded elevations a foot to twenty feet in height. Water issues from the apex of a mound and flows down over the surfaces forming small pools. The flow is independent of local rainfall. The temperature is uniform in all bogs studied although …

Petrography Of Two Iowa Loess Materials, F. Leicester Cuthbert

Proceedings of the Iowa Academy of Science

A research project, in the Department of Geology at Iowa State College, has as its purpose the investigation of the petrography of Iowa clays and soils. The investigation, at present, is concerned with two loess, subgrade materials which behave differently as roadbeds but are similar as far as ordinary physical tests are concerned. The samples are being subjected to fractionation by a supercentrifuge, complete chemical analyses, X-ray analyses, microscopic study and base exchange determinations. Work, to date, suggests that the colloidal portions of the two materials differ in their mineralogical character; one apparently containing as its principle clay mineral, illite, …

Some Quartzite Pebbles, Charles Carter

Proceedings of the Iowa Academy of Science

Near Luverne in Southwest Minnesota a ledge of quartzite extends northeast to southwest for a few miles. At one point along this ledge a quarry not now in operation has left an almost perpendicular face of some fifty feet. In this face are found crevices of varying widths. In one width of 8 to 12 inches and running back an undetermined distance, angular fragments of quartzite were found. Among them some rounded pebbles were obtained. The feature called to your attention is the symmetrical form and the highly polished surfaces of these pebbles. The surfaces of some are nearly as …

Occurrence Of Certain Small Fossil Plates In The Maquoketa Shale Of Iowa, R. C. Spivey

Proceedings of the Iowa Academy of Science

Small calcareous plates, possibly from Asteroidea or other Echinodermata, occur in the Maquoketa shale of Iowa. These plates all have similar characteristics, but vary in their minute structures, and the variations apparently have some stratigraphic significance.

Technique Of Radiography With Soft X-Rays, F. M. Bailey

Proceedings of the Iowa Academy of Science

The soft x-ray apparatus which was developed has been applied to the radiography of small biological specimens and other material requiring long wavelengths to produce sufficient contrast. Stereoscopic technique has also been used in order to provide three dimensional views of specimens.

The Magic Eye - A Demonstration Experiment, E. Hobart Collins

Proceedings of the Iowa Academy of Science

The soft x-ray apparatus which was developed has been applied to the radiography of small biological specimens and other material requiring long wavelengths to produce sufficient contrast. Stereoscopic technique has also been used in order to provide three dimensional views of specimens.

Three Dimensional Color Pictures By Projection, G. W. Fox

Proceedings of the Iowa Academy of Science

With the production of a cheap polarizing material stereoscopic projection of color pictures is a reality. The technique of projection by both the transmission and reflection methods will be demonstrated.

Tree Study Keys, Ida E. Iversen-Wolden

Proceedings of the Iowa Academy of Science

"Our Trees" by Professor H. S. Conard, Grinnell College, was used in the Mason City junior college biology in its first tree study of that city with its surrounding area. In the laboratory class study of the early fall, students were directed in the use of the "key." Later each one was responsible for the study of trees on his home lot, or an equivalent territory, collecting, pressing, mounting, labeling, and giving tree locations. Next, each student mapped his home block, adding to the leaf collections, and tree locations. Material was thus collected not only from Mason City hut from …

A Bovine Monstra Duplica, Karl A. Stiles, Collis M. Spencer

Proceedings of the Iowa Academy of Science

Double monsters are pathological deviants from identical twins, in that the embryos are joined in some manner. The embryos may be symmetrically united and developed, or one of the individuals may he arrested in its development. In describing the morphological relationships of the calf of this study, the right and left sides will refer to the animal's right and left respectively. From a superficial examination of this specimen it appears to be a single-bodied calf with two heads, an extra leg with two hooves protruding from the hack a short distance caudal to the vertex of the two heads, and …

Comparative Effects Of Gradually Increased Daily Periods Of Light And Activity On The Sex Cycle Of The Sparrow, Gardner M. Riley

Proceedings of the Iowa Academy of Science

It has been repeatedly demonstrated in birds that increased daily light periods during the inactive phase of the sex cycle results in precocious testicular development. An attempt has been made to determine whether light, itself, or the increased daily period of physiological activity is the essential factor in this development. Three series of experiments were conducted with the House sparrow during the fall and winter of 1938-39. In each series, the daily period of awakeness was regulated either by gradually lengthening the light period or by adding a period of compulsory activity (in complete darkness) to the basal light day. …

Iowa Species Of Agropyron, D. W. Augustine

Proceedings of the Iowa Academy of Science

The species of Agropyron constitute a highly variable group. Especially is this true of forms occurring in the western part of the United States. The ones found in Iowa, although fewer in number and often clear cut in character, frequently present difficulties in classification. It is the purpose of this paper to clarify some of these difficulties and to point out the more constant characters. The more common variations observed by the author are also described. Distribution maps were also made, based upon material in the herbaria at Iowa State College, Grinnell College and the University of Iowa. Further distribution …

Histology Of A Genetic Malformation In Corn, J. E. Sass, A. A. Bryan

Proceedings of the Iowa Academy of Science

"Knotted leaf" is a malformation of corn leaves, manifested as scattered, conical or irregular emergences on the dorsal surface of the leaf. These raised regions occur most commonly on the veins. A corresponding depression occurs on the ventral surface opposite each emergence. Sections show that an emergence is a thickened fold of the leaf blade. Thickening is associated with great enlargement of mesophyll and epidermal cells. There is little or no increase in the number of layers of cells comprising the thickness of the fold. The enlarged cells are uninucleate and the relatively small nuclei are diploid.

The Dielectric Constant Of Gases At Ultrahigh Frequencies, Alden H. Ryan

Proceedings of the Iowa Academy of Science

The heterodyne beat method has been applied to the measurement of the dielectric constant of gaseous NH₃, N₂, and CO₂, using a frequency of 56,000,000 cycles per second. Special precautions were found necessary to prevent frequency drift and synchronization of the oscillating circuits.

The Biological Action Of Rotenone On The Lake Fauna, Howard L. Hamilton

Proceedings of the Iowa Academy of Science

The powdered root of Derris elliptica, which contains the alkaloid, rotenone, has long been used by the natives of tropical countries as a fish and arrow poison. Recently it has been introduced in this country as an insecticide, and is being used by conservation workers to remove rough fish from waters which are to be stocked with game fish. Little or no consideration has been given to the possibility that the poison might kill other members of a lake fauna (thus breaking the food chain) and seriously affect the survival of any fish with which the waters might he restocked. …

Some Features Of The Squaw Formation Near Lander, Wyoming, Benjamin H. Burma, Irvin J. Anderson

Proceedings of the Iowa Academy of Science

The studies of the Squaw formation of the "Chugwater" series were conducted in the vicinity of Lander, Fremont County, Wyoming. Most of the observations were made at Derby Dome which is located in parts of T31N and T32N, R98W fifteen miles southeast of Lander. Others were made at Dallas Dome, nine miles southeast of Lander, and at Squaw Canyon, the type section, about four miles west of Lander. The region is one of moderately high, but not mountainous relief. The elevation at Lander is about 5350 feet, Derby Dome being somewhat less and Squaw Canyon somewhat more. Since it is …

A Determination Of The Adiabatic Elastic Constants Of Quartz, Philip J. Hart

Proceedings of the Iowa Academy of Science

If the elastic constants of a homogeneous, anisotropic material are known, it is possible to calculate the theoretical frequencies of the different modes of vibration between the faces of an infinite plate of the material. Conversely, knowing the frequencies of sufficient modes of vibration, it is possible to calculate the elastic constants. The frequencies of vibration of higher harmonics of finite plates, divided by the order of the harmonic, should approach very close to the frequency of the theoretical infinite plate. Plates of quartz were accurately oriented and cut from well-developed, flaw-free quartz crystals and the frequencies of higher harmonic …

The Time Of Embryonic Determination Of Sensoria And Antennal Color, And Their Relation To The Determination Of Wings, Ocelli And Wing Muscles In Aphids, Karl A. Stiles

Proceedings of the Iowa Academy of Science

Intermediate-winged aphids of the species Macrosiphum solanifolii were studied in an effort to determine the time of embryonic segregation of the sensoria and antennal color, and their relation to the determination of wings, ocelli, and wing muscle. Dark antennal color and increased sensoria of winged aphids are considered to be characters closely correlated in development; for in general, when there was a darkening of antennae, there was a corresponding increase in the number of sensoria. In practically all cases increased sensoria were correlated with a relatively large amount of nondegenerate wing muscle. It is concluded that embryonic determination of dark …

A New Eye-Hand Coordination Test, William Seidler

Proceedings of the Iowa Academy of Science

The purpose of this study is to devise an apparatus which will measure the type of eye-hand coordination found in automobile driving. The apparatus is of the serial reaction type, the total performance time being measured in hundredths of a second.

The Philosophy Of Science, H. T. Davis

Proceedings of the Iowa Academy of Science

A few months ago I sat at a banquet in a room of mirrors. The group of guests communicated with one another by spoken words. But as I sat and looked down the corridor of reflected images of ourselves, I could not help but feel that a vision of the great past of the human race was presented to my eye. As far as one could see, a vast assemblage of human forms was visible and I felt that in this little instant of the present time we were accompanied by the shadows of all those who had lived before …

Notes On Iowa Fungi. Viii, G. W. Martin

Proceedings of the Iowa Academy of Science

This striking member of the Mucorales appeared as a contaminant in a plate culture over which a piece of white pine wood bearing fructifications of Calocera cornea, collected in Pine Hollow, Dubuque County, in October, 1938, had been suspended. This is its third appearance. In both of the earlier instances, it had also appeared as a contaminant in plate cultures. The original record, from Washington, D. C. (Mycologia 24:187. 1932) was from plates in which attempts were being made to isolate an orange pathogen; the second, from Lafayette, Incl. (Mycologia 26:133. 1934) was the result of its appearance in …

Plugging Abandoned Water Wells, H. Garland Hershey

Proceedings of the Iowa Academy of Science

Underground waters are one of the most valuable mineral resources of Iowa and each year they are being more widely used. Since the supply of potable waters is limited, their conservation is a matter for careful consideration. Every effort should he made to guard against contamination and loss. One of the chief causes of mineralogical and bacteriological contamination and loss of desirable water is underground circulation from one water-bearing horizon to another in old or abandoned wells. Plugging abandoned wells, provided it is properly clone, is the best method known to prevent underground circulation. The advantages of cement, mud-laden fluids …

College Catalog 1938-1939, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents:

College Calendar for the Year 1939-40.. 5
State Board of Education.. 6
Officers of Administration... 7
Officers of Instruction.. 8
Department of Directed Observation and Supervised Student Teaching.. 15
Extension Service.. 18
Other Officers and Assistants... 19
Faculty Committees... 23
General Information
Historical Sketch.. 26
Buildings and Grounds... 26
Enrollment and Registration.. 31
Fees... 32
The College Dormitories.. 34
The Commons... 35
Accredited Rooming Houses... 35
Resume of a Student's Expenses Per Year.. 36
Employment of Students.. 36
Partial Tuition Exemptions... 37
Student Loan Fund.. 37
Student Organizations.. 37
Control of Extra-Curricular Activities.. 39
Placement Bureau.. 39 …

Diseases Of Cultivated Lupines, C J. Gould Jr.

Proceedings of the Iowa Academy of Science

The cultivation of lupines has been practiced in Europe for over a thousand years. Impoverished Greeks and Romans used lupine meal in their bread and farmers have long grown the plants for forage and green manure. Extensive cultivation of these plants would be expected because the seed, which consists of from 30 to 40 per cent protein, is high in food value and because relatively high yields can be obtained even under unfavorable conditions. Stock poisoning, however, has frequently resulted from consumption of these plants owing to the presence of harmful alkaloids. Such substances could be removed from the seeds, …

The Comparison And Correlation Of Certain Attitudes And Deceptive Tendencies, Wayne Leffler

Proceedings of the Iowa Academy of Science

Various studies made by Voelker and Howells have indicated specific tendencies to cheat in persons. Martson found that women were 14 times as honest and 9 times as truthful as men on the average. An unpublished study by Johns and Lauer, made of 94 delinquent boys, indicated a tendency to cheat in certain subject matter. The examinees tended to overstate their knowledge of music and parts of automobiles, but gave a more or less correct statement of knowledge concerning books of the Bible. The present study is an attempt to secure data on comparison of tendency of students to cheat …

The Address Of The President: The Chromosome And The Origin Of Species, J. N. Martin

Proceedings of the Iowa Academy of Science

In Lamark's Philosophy of Zoology published in 1809 and devoted to the author's views on the origin of species there is the following statement: The most important of the laws, methods, and progress of nature have nearly always sprung from the examination of the smallest objects which she contains and from apparently the most insignificant enquiries. The studies of chromosomes, nuclear bodies so minute that they escaped discovery until recently but now considered the primum mobile of nearly all life processes, have well verified the truth of Lamark's statement. That the chromosomes, insignificant in sizes as they are, constitute the …