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Some Observations On Spectral Color Discrimination, Le Roy D. Weld

Proceedings of the Iowa Academy of Science

Some years ago the writer encountered a reference to a certain spectral line which was there characterized as "blue," whereas I should without hesitation have called it violet. This suggested the question as to whether the common names of pure colors had ever been defined as to their wave length boundaries, and a surprising lack of agreement on the subject was shortly disclosed. For example, there appear in the literature the following designations of spectral color boundaries, in Angstrom units, incidentally with no indication as to how they were arrived at.

A Preliminary Study Of Pitch Inflection In The Speech Of Preschool Children, Melvin S. Hattwick

Proceedings of the Iowa Academy of Science

Individual and group studies of the language development of children have largely centered about the meaningful content including vocabulary, the production of speech sounds, and growth in the use of the sentence. Practically no studies have been made of the expressive side of language development including pitch variation, vocal quality, accent and emphasis, and the temporal organization of the language units.

A Study Of Methods For The Determination Of Reducing Sugar In Bacteriological Media Ii, E. J. Mccreary, H. G. Smith

Proceedings of the Iowa Academy of Science

Previous work of Magee and Smith has shown that the determination of reducing substances in beef-broth media by the Shaffer-Hartman micro method, following clarification with lead sub-acetate, gives results that are extremely variable. It was found impossible to completely recover known quantities of glucose added to the medium.

Sedimentation Of The Cedar Valley Limestone, A. C. Tester

Proceedings of the Iowa Academy of Science

Exposures of the Cedar Valley limestone adjacent to Iowa City show a wide variation from the conditions usually described for the disposition of limestones. Existing descriptions of the Cedar Valley limestone make little mention of the irregular lamination, the contemporaneous structures of the beds, the cross bedding, or the meaning of the lithographic zones in the formation. Such structures indicate a condition of very shallow regularly agitated water, with periods of actual exposure above water level.

Proceedings Of The Forty-Sixth Annual Meeting Of The Iowa Academy Of Science, Held At Cedar Falls, April 29 And 30, 1932: Minutes Of The Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

Motility In Newborn Infants, Orvis C. Irwin

Proceedings of the Iowa Academy of Science

The motility of 73 newborn infants under 16 days of age has been measured by the stabilimeter-polygraph technique. Some of the more important results are: the demonstration of individual differences in motility soon after birth; the absence of sex differences; the relation of motility to nutritional status, hunger, body temperature, sleep, and various physical measurements and indices such as weight, height, body surface, etc.

Title Page - Front Matter

Proceedings of the Iowa Academy of Science

No abstract provided.

Cross Inoculation Between The Root Nodule Bacteria Of Soybeans And Cowpeas, D. A. Anderson, R. H. Walker

Proceedings of the Iowa Academy of Science

It has been quite generally accepted for a long time that the root nodule bacteria from soybeans would not produce nodules on cowpeas, and that the bacteria from cowpea nodules would not produce nodules on soybeans. This conception has been supported by numerous cross-inoculation tests and field experiments, and as a result the organisms have been placed in different cross-inoculation groups and even into different species. 19. Comparative dissimilation-The dissimilative action of Escherichia coli, Citrobacter anindolicum and various organisms of the intermediate groups on xylose and on dextrose was studied under comparable conditions with the aim of postulating a mechanism …

An Experiment To Determine The Influence Of Certain Factors Of Learning During Class Period In College, E. O. Finkenbinder

Proceedings of the Iowa Academy of Science

Two sections each of forty students in Psychology were given placement tests, a psychological content pre-test of five hundred fifty questions, and this repeated at the end of six weeks after covering the content in readings and class discussion.

College Catalog 1931-1932, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents

College Calendar for the Year 1932-33 ... 5
State Board of Education ... 6
Officers of Administration and Instruction ... 7
General Information
Historical Sketch ... 26
Buildings and Grounds ... 26
Enrollment ... 29
Expenses Tuition and Fees ... 29
Room and Board in Bartlett Hall ... 30
Room and Board in Private Rooming Houses ... 31
Scholarships ... 31
Employment of Students ... 31
Loans ... 32
Student Organizations ... 32
The Placement Bureau ... 33
General Regulations
Entrance Requirements ... 34
Admission with Advanced Standing ... 36
Advisers and Amount of Work ... 36 …

Correlation Studies Of Zea Mays Under Field Conditions, Harold F. Eisele, J. M. Aikman

Proceedings of the Iowa Academy of Science

This paper is a report of statistical studies involving correlations between various growth responses of corn plants and factor data obtained in the immediately vicinity of the growing plants. Weekly growth measurements of the corn plants were obtained and these were correlated with the factor data obtained from recording instruments. 22. The relation of moisture-Thermal conductivity of oats and other grain has received little if any attention. Employing the Stiles apparatus, an attempt has been made to ascertain the specific thermal conductivity of oats, having moisture contents up to maximum absorption. The thermal conductivity of a substance is the amount …

The Relation Of Moisture To Thermal Conductivity In Oats, A. L. Bakke, H. Stiles

Proceedings of the Iowa Academy of Science

Thermal conductivity of oats and other grain has received little if any attention. Employing the Stiles apparatus, an attempt has been made to ascertain the specific thermal conductivity of oats, having moisture contents up to maximum absorption. The thermal conductivity of a substance is the amount of heat which will pass per unit of time through unit area of a layer of the substance of unit thickness, the opposite faces of the layer having a temperature difference of one degree.

Iodine Monochloride, Jacob Cornog, R. A. Karges, H. W. Horrabin

Proceedings of the Iowa Academy of Science

Iodine monochloride may be prepared in quantity and of superior quality by the reaction between solid iodine and liquid chlorine at -78°: Vapor pressure measurement of iodine monochloride between 30° and 60° indicate that it is a polar substance. If Ammonium chloride or potassium chloride is dissolved in liquid iodine monochloride conducting solutions are formed. When iodine monochloride reacts with common salts and chemical reaction ensues the reaction is usually either direct addition or else is solvolytic.

Comparative Cost Of Soap As A Water Softener, O. E. Lowman

Proceedings of the Iowa Academy of Science

Alcoholic solutions of equal weights of different brands of soaps are made up by the instructor. No attempt is made to standardize these solutions against a standard calcium chloride solution. These solutions should be distinguished by letter rather than by name. One or more students may be assigned to same soap solution.

Absorption Spectra Characteristic Of Vitamin A In Animal And Vegetable Oils, J. B. Philipson, Jay W. Woodrow

Proceedings of the Iowa Academy of Science

A continuation of our previous work on the ultra-violet absorption spectra of substances showing vitamin A activity, tends to further substantiate the evidence that the absorption band in the regions 325-330 m.μ., which Morton and Heilbron have shown to be characteristic of vitamin A in animal fats, also characterizes vegetable compounds containing the growth promoting factor.

Motion Of K+ Ions In Mercury Vapor, Carl Frische

Proceedings of the Iowa Academy of Science

Ionization by positive ion impact was studied in A, Ne, N₂ , CO, He, at voltages up to 4000 volts and the results seem to check with those of Sutton (Phys. Rev. 33, 363, 1929) and Beeck (Ann. cl. Phys. 6, 8, 1001, 1930) wherever a check was possible. When the work was extended to an element heavier than K + i.e., Hg. the results are more complicated. The evidence seems to indicate; (a) reflection of K + ions at all voltages, (b) an increase in mean free path with increase in voltage, (c) no ionization below 250 volts, …

Are You Educated?, H. Earl Rath

Science Bulletin

A few months ago we tried to set up a sort of standard by which a per- son might judge as to whether or not he could satisfy the demands of ordinary health. It shall be the purpose of this article to set up a standard by which an individual might judge of the adequacy of his or her health knowledge. This discussion is based largely on the "Ten Commandments" by Dr. Livingstone Farr -and, given in an address before the American Public Health Association, and printed in College Text books of Hygiene by Smiley and Gould. Many will probably …

The Apology Of A Pedagogue: Editorial

Science Bulletin

"The world's stock of knowledge is seldom augmented by pedagogues." H. L. Mencken.

With all due respect to the author of the above and the several brilliant things he has written, bosh! The sentence makes interesting reading, and doubtless returned the writer several cents per word, besides giving his doting henchmen many chuckles at the expense of the puerile pedagogue. But mere pertness of expression connotes neither truth nor profundity, and had the writer of the above sentence set about deliberately to formulate a fundamental untruth, he could not have fashioned one whose Munchausen quality was more obtrusively obvious.

Disposal Of Wastes From The Beet Sugar Industry, Edward Bartow

Proceedings of the Iowa Academy of Science

The wastes from beet sugar manufacture include (1) beet washing water, (2) diffusion water, (3) lime sludge, (4) Steffens waste. The extracted beet pulp which might be considered a waste is dried and fed to cattle. The beet wash water can be recirculated and the sand, mud, etc., removed. The diffusion water may be treated with lime and disposed of on sand filters. The lime sludge may be settled and the precipitate used as anti-acid on land. The Steffens waste which amounts to approximately 2l0,000 gallons for 1,000 tons of beets is the most concentrated and most difficult to handle.

The Address Of The President - Our Underground Geology, James H. Lees

Proceedings of the Iowa Academy of Science

Before I begin the serious discussion of this topic may I make a few explanatory statements? In the first place I realize that the title I have chosen is misleading in that it may convey the impression that we geologists are, or think we are, thoroughly familiar with the strata beneath our feet. As a matter of fact we know little more than the bare outlines of the facts regarding these strata and many years and much labor will be needed for completing their study as thoroughly as must ultimately be done. But I am devoted to brief titles, and …

The Daily And Seasonable Variation In The Internal Temperatures Of Two Trees, Populus Deltoides Marsh, J. N. Martin

Proceedings of the Iowa Academy of Science

The two poplars of this experiment are on the parking of a street running north and south. At three feet above ground, where the temperatures were taken, the south tree is 18.5 inches and the north tree 16 inches in diameter. All lower branches have been removed to a height of 16 feet or more and there are no obstructions to forenoon or afternoon sunlight. They are openly situated.

A Gametophyte Of Botrychium Obliquum Muhl, Henry S. Conard

Proceedings of the Iowa Academy of Science

In the rich mesic deciduous forest of the hills along the north shore of Long Island, N. Y., Botrychium obliquum Muhl. is occasionally found. In a small group of the dissectum variety found July 28, 1931, some had such tiny leaves as to suggest the search for gametophytes. On digging up the smallest plant the brown empty skin of the gametophyte was found, attached to the crown of the young plant, about 3 cm. below the surface of the ground The soil was a fine sand, covered by less than a centimeter of leafy humus.

In Memoriam: George Ellsworth Thompson; Stephen J. Popoff; Samuel Walker Beyer; Johan Augustus Udden; William Ernest Andrew Slaght; Merrill M. Meyers, L. B. Spinney, Edward Bartow, C. S. Gwynne, W. H. Norton, Christian A. Ruckmick, James H. Lees

Proceedings of the Iowa Academy of Science

No abstract provided.

The Plants Of Emmet County, Iowa, B. O. Wolden

Proceedings of the Iowa Academy of Science

Emmet County lies in the northwestern part of the state bordering on Minnesota and is one of the smallest counties in Iowa, having an area of only 395 square miles. Space will not permit any lengthy description of the physiography and the geological formations of the county. These are fully treated in the report on the Geology of Emmet, Palo Alto and Pocahontas Counties by the Iowa Geological Survey.

A Boreal Moss Community, Henry S. Conard

Proceedings of the Iowa Academy of Science

It would be interesting to present as vivid a picture as possible of the vegetation of the Taxus Hillside in Pine Hollow, and let the reader guess where such a place must be. It is in the northwestern corner of Dubuque County, Iowa. Pine Hollow is a winding canyon, cut about three hundred feet below the tops of the surrounding hills.

The Value Of Twig And Bud Characters In Keys For The Identification Of Trees In Summer Condition, Harold D. Harrington

Proceedings of the Iowa Academy of Science

The purpose of the following presentation is to call attention briefly to the value of the twig and bud characters used commonly in winter keys, as supplementary or secondary characters in the keys for the identification of trees in summer condition. For the past few years the writer has been studying the winter characters of our woody plants. Many of the characters that are used to distinguish between difficult genera or species in winter were found to be present the succeeding summer and became a definite help in identification.

Action Of Solvents On Steffen's Waste Water From The Manufacture Of Beet Sugar, Edward Bartow, E. C. Little

Proceedings of the Iowa Academy of Science

The Steffen's process for the recovery of sugar from beet molasses consists of a cold and a hot precipitation. The molasses has a specific gravity of about 1.3 and a sucrose content of approximately 50 per cent. It is diluted with water until it has a specific gravity of about 1.05, and contains 5 to 6 per cent of sucrose. To this solution cooled to 15°C, powdered lime is added, with agitation, in the proportion of one part calcium oxide to one part sucrose. In the cold precipitation process, insoluble tri-calcium saccharate is precipitated.

Some Meiotic Irregularities In Cultivated Lilies, John E. Sass

Proceedings of the Iowa Academy of Science

Refinements of the paraffin technique make it possible to demonstrate critical details of meiosis. The process yields figures that are comparable to the results of the smear process. Progressive synapsis during amphitene, and the tetrad structure of the chromosome at strepsiphase can be readily demonstrated.

The Somatic Chromosomes Of Eight Species Of The Orchidaceae, L. M. Humphrey

Proceedings of the Iowa Academy of Science

A study of the somatic chromosomes of eight species of the Orchidaceae native to Minnesota was undertaken in 1931. Root tips were used, and were run into paraffin and stained with gentian violet. The diploid numbers were found to be as follows: Cypripedium acaule 20, C. pubescens 20, C. candidum 20, Calypsa bulbosa 32, Orchis spectabilis 42, Orchis rotundifolia 42, Habenaria bractiata 42, and Habenaria orbiculata 42. Sharp morphological differences were noted. The chromosomes of the cypripediums were very large measuring from 7-10 microns long, and from one to nearly two microns in diameter. Those of the other genera were …

Iowa Field Notes On Reproduction Of Canada Thistle (Cirsium Arvense), Ada Hayden

Proceedings of the Iowa Academy of Science

There is a legend that Canada thistle docs not reproduce viable seed in southern Iowa. There exists diversity of recorded statement as to whether the root or the stem is responsible for the vegetative spreading of this plant. The deep-penetrating and horizontally growing root of Canada thistle appears, if judged by structure and behavior, to be organized for extension of its area of occupation, for water and nutrient absorption, as well as for food storage. It bears numerous upward-growing, stem-producing buds whose photosynthetic activity maintain its supply of carbohydrate food. The plant seeds throughout Iowa wherever male and female plants …