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New Sub-Surface Data From Lyon County, Northwest Iowa, A. C. Tester Jan 1937

New Sub-Surface Data From Lyon County, Northwest Iowa, A. C. Tester

Proceedings of the Iowa Academy of Science

During the summer of 1936 a well was drilled for a municipal water supply at Larchwood, Lyon County. The location is in the extreme northwestern corner of the state, being three miles south of Minnesota and eight miles east of South Dakota. Sioux quartzite is exposed less than seven miles to the northwest. The total depth of the well is 560 feet, which includes 324 feet of glacial material and a complete section of the known upper Cretaceous of western Iowa. The Cretaceous beds are classified as Carlile, Greenhorn, Graneros and Upper Dakota sandstone, the latter being the water producing …

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The Effect Of Different Styles Of Mutes Upon The Intensity And The Harmonic Structure Of The Violin Tone, E. P. Horne Jan 1937

The Effect Of Different Styles Of Mutes Upon The Intensity And The Harmonic Structure Of The Violin Tone, E. P. Horne

Proceedings of the Iowa Academy of Science

The general problem was to study the effect of variations of the violin bridge upon intensity and timbre. In this paper a report will be given of the results with regard to the addition of different mutes to the bridge. In general the results indicate that (1) muting reduces energy in the upper partials, but that the different mutes are not uniformly selective throughout all the partials, and (2) all mutes do not necessarily reduce the total intensity of all strings proportionately.

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The Reliability Of Certain Scales For Measuring Attitudes, A. R. Lauer, Robert Taylor Jan 1937

The Reliability Of Certain Scales For Measuring Attitudes, A. R. Lauer, Robert Taylor

Proceedings of the Iowa Academy of Science

A list of 100 words were checked for five degrees of preference by 118 adult male subjects of post-college age. The attitude categories were arbitrarily called; liberal, socialistic, sports, risk and annoyance, law enforcement, racial and religious, and cultural. The reliability coefficients ranged from +.77 down to +.29. The highest reliabilities were found for the attitudes of law enforcement, liberalism, and risk and annoyance. The lowest reliabilities were for the attitudes toward race and religion, socialism and the sports.

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Inoculation Against Spring Fever In The Elementary Course In Zoology, Fae M. Shawhan Jan 1937

Inoculation Against Spring Fever In The Elementary Course In Zoology, Fae M. Shawhan

Proceedings of the Iowa Academy of Science

Webster's dictionary defines inoculation as "the act or process of improving." Also, I find that "inoculation may be protective, when the substance injected aims to secure immunity; or curative, when an anti-toxin is injected as a remedy."

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The First Record Of The Black Widow Spider (Lactrodectus Mactans Texanus) For Iowa, Karl A. Stiles Jan 1937

The First Record Of The Black Widow Spider (Lactrodectus Mactans Texanus) For Iowa, Karl A. Stiles

Proceedings of the Iowa Academy of Science

There is great interest at the present time in the most poisonous of spiders, the black widow. This interest has been stimulated by the belief on the part of some biologists that its geographical range, which heretofore has been considered southern is being greatly extended. Scientific journals have been reporting the appearance of the black widow in states where it has not previously been found until on January 22, in Science, the statement was made that Minnesota and Iowa were the only states in which it had not been found. The writer believes that Iowa may be added to the …

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Index Jan 1937

Index

Proceedings of the Iowa Academy of Science

No abstract provided.

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Proceedings Of The Fifty-First Annual Meeting Of The Iowa Academy Of Science, Held At Dubuque, April 16 And 17, 1937: Minutes Of The 1937 Meeting; Staff & Committee Reports Jan 1937

Proceedings Of The Fifty-First Annual Meeting Of The Iowa Academy Of Science, Held At Dubuque, April 16 And 17, 1937: Minutes Of The 1937 Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

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Grasshoppers In Iowa In 1936, Carl J. Drake, George C. Decker Jan 1937

Grasshoppers In Iowa In 1936, Carl J. Drake, George C. Decker

Proceedings of the Iowa Academy of Science

Iowa and other mid-western states suffered tremendous grasshopper losses in 1936. Although the heaviest damage occurred in the western and southern counties, the infestation extended across the southern half of the state and up along the Mississippi River into a number of northeastern counties. In fact, more or less damage occurred in all save about 25 counties located in the northcentral part of the state. Over 21,000 farmers broadcast 200 or more pounds of poison bait on their respective farms, and a total of 4,463 tons of dry bait materials were wet and mixed at 52 county mixing stations.

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Effect Of Auditory And Visual Stimuli On Brain Potential Rhythms, Betty M. Martinson Jan 1937

Effect Of Auditory And Visual Stimuli On Brain Potential Rhythms, Betty M. Martinson

Proceedings of the Iowa Academy of Science

This study attempts to compare the blocking of the Berger rhythm caused by visual and auditory sensations. Four stimuli were used - a bright light of one hundred (100) watts, a dim light of twenty-five (25) watts, a thousand cycle tone at approximately seventy (70) decibels, and a similar tone at approximately forty (40) decibels. A series of two hundred stimuli composed of fifty of each of these arranged in random order was presented to the subject. The records were read for latency and perseveration of the blocking and the four types of stimulus were compared.

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Some Molds Associated With Meat In Cold Storage Lockers In Iowa, G. Semeniuk, W. C. Ball Jan 1937

Some Molds Associated With Meat In Cold Storage Lockers In Iowa, G. Semeniuk, W. C. Ball

Proceedings of the Iowa Academy of Science

In the past few years throughout the United States cold storage locker plants have been introduced as a new industry, offering their services to the public as storage depots for perishable foods, particularly meats. The wide-spread popularity of this industry is attested by the existence of approximately two thousand cold storage locker plants in the United States of which two hundred are located in Iowa. Over one hundred of these plants in Iowa were introduced during the past year, and there is every indication that their number win continue to increase.

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Notes On Iowa Fungi. Vii, G. W. Martin Jan 1937

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

Proceedings of the Iowa Academy of Science

The drought of 1936, culminating a series of dry years, was the most severe on record in Iowa. The year started with an accumulated moisture deficiency, and during the five months from April to July, inclusive, the average precipitation for the State as a whole was only 8½ inches, slightly less than half the long-time average for the period. The lack of rain was coupled with record breaking heat. All the months but April were above average in temperature and July was the hottest month ever experienced. Under such conditions the humus and upper layers of the soil as well …

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The Effect Of Drought And Heat In 1936 On The Functioning Of The Staminate Flowers Of Maize, J. N. Martin Jan 1937

The Effect Of Drought And Heat In 1936 On The Functioning Of The Staminate Flowers Of Maize, J. N. Martin

Proceedings of the Iowa Academy of Science

During the season of 1936, the extreme drought and heat very noticeably interfered with the normal functioning of maize flowers, making it difficult in many cases to obtain satisfactory results in the breeding plots. Both staminate and pistillate flowers were affected, but this discussion is confined to observations of the effect on the functioning of the staminate flowers.

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The Effect Of Various Treatments On The Rate Of Decomposition Of Organic Matter In Soils Under Continuous Corn, W. J. Peevy, F. B. Smith, P. E. Brown Jan 1937

The Effect Of Various Treatments On The Rate Of Decomposition Of Organic Matter In Soils Under Continuous Corn, W. J. Peevy, F. B. Smith, P. E. Brown

Proceedings of the Iowa Academy of Science

A study of the content and rate of decomposition of organic matter in soils is of considerable practical importance. The benefits derived from a supply of rapidly decaying organic matter in the soil include increased microbial activity, greater availability of nitrogen and other plant food constituents and the maintenance of good tilth in the soil and hence better crop yields. Under continuous cropping, as with corn, the rate of decomposition is fairly rapid and the content of organic matter drops to a low level unless regular additions are made. Under such a system some organic matter is added each year …

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Lignin Decomposition In Soils, J. B. Bartlett, F. B. Smith, P. E. Brown Jan 1937

Lignin Decomposition In Soils, J. B. Bartlett, F. B. Smith, P. E. Brown

Proceedings of the Iowa Academy of Science

Most of our agricultural plants contain from 10-20 per cent of a complex material, called "lignin." It is generally accepted that the rigidity of plant stems is due to this lignin which is found in the walls of the xylem cells. Thus, all of the plant residues added to soils contain an appreciable quantity of lignin. The exact chemical structure of this complex is as yet undetermined. In fact, it is even doubtful whether we can ever obtain one chemical formula which can be said to represent lignin. For the soils worker, however, the importance of lignin lies in the …

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The Strophiole In Sweet Clover And Alfalfa Seeds, J. N. Martin Jan 1937

The Strophiole In Sweet Clover And Alfalfa Seeds, J. N. Martin

Proceedings of the Iowa Academy of Science

A microscopic study of mature seed coats and of the development of the seed coats of sweet clover and alfalfa, does not reveal a structure comparable to a strophiole. The seed coat is much arched and palisade layer doubled at the microphyle, but there are no openings in the palisade layer nor any excrescences or tubercles about the hilum. At the margin of the hilum where the arching of the seed coat begins abruptly, resulting in a sharp curving of the seed coat, the palisade layer is apparently weaker and more easily broken than elsewhere. This was shown by the …

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Earthquake History In Iowa, Mrs. M. M. Seeburger Jan 1937

Earthquake History In Iowa, Mrs. M. M. Seeburger

Proceedings of the Iowa Academy of Science

A summary of shocks felt in Iowa during the last 125 years with brief notes concerning each. Seismic regions surrounding Iowa were reviewed briefly.

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General Formulae For Homozygosis, H. W. Norton Iii Jan 1937

General Formulae For Homozygosis, H. W. Norton Iii

Proceedings of the Iowa Academy of Science

To find f (x) from the linear fractional relation.

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The Zeeman Effect On The Hyperfine Structure Of Optically Excited Mercury Resonance Radiation, E. Hobart Collins Jan 1937

The Zeeman Effect On The Hyperfine Structure Of Optically Excited Mercury Resonance Radiation, E. Hobart Collins

Proceedings of the Iowa Academy of Science

Optically excited mercury resonance radiation was used as a light source to provide the sharpest possible hyperfine structure lines of Hg. 2537. This light source was placed in magnetic fields varying from zero to 2000 gauss. A lummer plate and a camera with a special quartz lens was used to secure the Zeeman hyperfine structure patterns. The patterns were analyzed by the newly installed micro photometer of the State University of Iowa. The measurements and theoretical interpretations are given.

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Comparison Of Some Commercially Available Photographic Negative Materials, Harris Hug Jan 1937

Comparison Of Some Commercially Available Photographic Negative Materials, Harris Hug

Proceedings of the Iowa Academy of Science

Characteristic curves have been made for several types of negative films manufactured by Eastman Kodak Co. and of corresponding films manufactured by Agfa Ansco Corporation. Although the curves are remarkably similar, there are a few interesting differences.

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Effect Of Previous Training On Grades In Elementary Physics, E. C. Mccracken Jan 1937

Effect Of Previous Training On Grades In Elementary Physics, E. C. Mccracken

Proceedings of the Iowa Academy of Science

A study has been made of the relationship between the grades received by students in an elementary course in Physics taken by Home Economics students at Iowa State College and the general high school average of the students. If the college course is taken during the student's first quarter in college a comparison of the curves expressing this relationship for pupils who have had a high school physics course and for pupils who have had no previous physics course shows that there is a particular high school general average below which there is no advantage in having had a previous …

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The Effect Of Training In Phonics Upon Reading Ability At The College Level, Maurine Rogers Jan 1937

The Effect Of Training In Phonics Upon Reading Ability At The College Level, Maurine Rogers

Proceedings of the Iowa Academy of Science

The purpose of this experiment was to ascertain the effect of phonic ability upon reading ability at the college level. The subjects were 72 poor readers from the lowest 20 per cent of reading scores of University of Iowa freshmen. Half of these readers formed an experimental group and a like half a control group. Vocabulary tests and pronunciation tests composed of the same words were given. These were accompanied by paragraph comprehension and oral reading tests. The experimental group then took a period of individual phonic training at the end of which both experimental and control groups were retested. …

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Effects Of Anterior Pituitary Thyrotropic Hormone In The House Sparrow, Passer Domesticus (Linnaeus), Dorothea Starbuck Miller Jan 1937

Effects Of Anterior Pituitary Thyrotropic Hormone In The House Sparrow, Passer Domesticus (Linnaeus), Dorothea Starbuck Miller

Proceedings of the Iowa Academy of Science

Previous studies have shown that thyroxin injections cause definite color changes in the plumage of the male sparrow. Attempts have been made to induce hyperthyroidism by stimulating the thyroids with injections of thyrotropic hormone extracted from sheep anterior pituitary. Microscopic studies of the thyroid glands and measurement of the metabolic rate indicate that a hyperthyroid condition has been produced. However, no modifications in plumage have been noted following varying doses of thyrotropic hormone or combined injections of thyroxin and thyrotropic hormone.

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Comparative Effects Of Light Stimulation And Administration Of Gonadotropic Hormones On Female Sparrows, G. M. Riley Jan 1937

Comparative Effects Of Light Stimulation And Administration Of Gonadotropic Hormones On Female Sparrows, G. M. Riley

Proceedings of the Iowa Academy of Science

Female sparrows (Passer domesticus) were subjected to increased daily periods of illumination at different times during the fall and winter. In every instance the effect upon the ovary was very slight. On the other hand, the ovaries respond to injections of gonadotropic hormones at any time during the sex cycle. The development approaches that attained at the height of the breeding season. The results indicate that it is not a refractoriness of the ovary which explains the non-effect of light during the fall and winter, but rather the failure of the anterior pituitary to release the essential hormones. Contrary to …

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The Banana Floatingheart (Nymphoides Aquaticum), Henry S. Conard Jan 1937

The Banana Floatingheart (Nymphoides Aquaticum), Henry S. Conard

Proceedings of the Iowa Academy of Science

It is well known that Nymphaea mexicana Zucc. and Nymphoides aquaticum (Walt.) produce brood bodies, hibernating bodies or organs of vegetative propagation. In both species the bodies consist of a cluster of fleshy roots more or less resembling a "hand" or a small bunch of bananas.

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Electrokinetic Potentials At Liquid Surfaces, W. G. Eversole, D. L. Deardorff Jan 1937

Electrokinetic Potentials At Liquid Surfaces, W. G. Eversole, D. L. Deardorff

Proceedings of the Iowa Academy of Science

Aqueous solutions of potassium chloride were allowed to flow through air. The solutions were from 10-1 N to 10-7N. The hydrostatic pressure was from 23 to 80 cm. of solution. The flow was vertical and laminar, through a circular aperture in a thin platinum disc on to a second platinum disc. The diameter of the aperture was 0.05 cm. The discs served as electrodes. The potential difference was measured with a vacuum tube potentiometer. A F.P. 54 G. E. tube was used, so the potential difference was measured with essentially no current flow.

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High Molecular Weight Fatty Acid Derivatives, Grover M. Ford, Henry Gilman Jan 1937

High Molecular Weight Fatty Acid Derivatives, Grover M. Ford, Henry Gilman

Proceedings of the Iowa Academy of Science

A series of derivatives for identifying lauric, myristic, palmitic, stearic and oleic acids have been prepared. The ten best series of derivatives may be listed in the following order of decreasing importance: (1) N-acylcarbazole derivatives; (2) N-acyl-p-toluenesulfonamides; (3) p-phenyl-phenacyl esters; (4) N-acylphenothiazine derivatives; (5) N-acyl-2-nitro-p-toluidine derivatives; (6) N-acylsaccharin derivatives; (7) 2, 4-dinitrophenylhydrazides; (8) p-nitro-anilides; (9) phenylmercuric salts; (10) p-xenylamides.

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The Determination Of The Dielectric Constants Of Aqueous Salt Solutions At Ultra High Frequencies, W. C. Oelke, A. Singer Jan 1937

The Determination Of The Dielectric Constants Of Aqueous Salt Solutions At Ultra High Frequencies, W. C. Oelke, A. Singer

Proceedings of the Iowa Academy of Science

The determination of the dielectric constants of aqueous salt solutions is accomplished by an adaptation of the method used by Paul Drude in 1897. A stable ultra high frequency vacuum tube oscillator is used to produce standing waves in an inductively coupled Lecher wire system. The wave length used is 123 cm. The resonant point on the parallel wires, crossed by a condenser containing the salt solution, is used to measure the dielectric constant. The results obtained with KCl and K2SO4 solutions indicate that interesting and reliable results may be expected even for good conductors.

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Large Angle Scattering And Energy Loss Of Potassium Ions Scattered By Argon, Krypton, Xenon, And Mercury Vapor, Arthur G. Rouse Jan 1937

Large Angle Scattering And Energy Loss Of Potassium Ions Scattered By Argon, Krypton, Xenon, And Mercury Vapor, Arthur G. Rouse

Proceedings of the Iowa Academy of Science

Potassium ions with energies of 90 to 360 volts were scattered by single collisions in the mentioned gases. The energy of the potassium ion after collision has been found to agree with the expected energy assuming conservation of energy and momentum. The angular distribution of the scattered ions is found to vary with the initial energy of the ion and with the target atom, becoming particularly interesting above the ionization potential.

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Some Findings In The Nation-Wide Teaching Program, C. J. Lapp Jan 1937

Some Findings In The Nation-Wide Teaching Program, C. J. Lapp

Proceedings of the Iowa Academy of Science

The Nation-wide program in College Physics testing is now in its fourth year and many interesting findings have been made. They were presented by slides and diagrams.

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Two Experiments For First Year Students Of Physics, W. H. Kadesch Jan 1937

Two Experiments For First Year Students Of Physics, W. H. Kadesch

Proceedings of the Iowa Academy of Science

In the first of these the acceleration due to gravity is measured by timing by means of an electrically driven tuning fork the descent of a small metal ball. The start and finish of the fall are recorded electrically on a rotating drum on which the fork is also making a trace. In the second experiment the average velocity of air molecules is measured by finding the volume per second of the gas emerging from a region of higher pressure (usually atmospheric) into one of low pressure, through a small orifice of measured diameter.

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