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A Measure Of Capacity For Acquiring Skill In Coordination Of Eye And Hand, Wilhelmine Koerth Jan 1920

A Measure Of Capacity For Acquiring Skill In Coordination Of Eye And Hand, Wilhelmine Koerth

Proceedings of the Iowa Academy of Science

Because success in many industries and activities depends to a large extent on ability to acquire skill in coordination of eye and hand, a measure of this capacity would prove very serviceable in both vocational guidance and selection. We are now trying to determine whether an apparatus providing a moving target of known size, following a constant predictable path at a uniform rate of speed will give an index of such capacity. This index is to be found by measuring the observer's ability to hold a ringed, metallic pointer on the moving target.

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Recent Army Worm And Variegated Cutworm Outbreaks In Iowa, H. E. Jaques Jan 1920

Recent Army Worm And Variegated Cutworm Outbreaks In Iowa, H. E. Jaques

Proceedings of the Iowa Academy of Science

The 1919 and 1920 outbreaks of Army worms within our state were by no means new experiences for Iowa. Previous heavy losses from this pest, however, date back so many years that the younger generation of farmers knew them only by tradition. With older men, the memories of their experiences seem to have been somewhat confused so that many stories were related that were but in part in keeping with the history and habits of the Army worm. With all classes there seemed to be an unwarranted fear of the insect and exaggerated ideas of its ability to travel, reproduce …

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Notes On The Branches Of The Aorta (Arcus Aortae) And The Subclavian Artery Of The Rabbit, Francis Marsh Baldwin Jan 1920

Notes On The Branches Of The Aorta (Arcus Aortae) And The Subclavian Artery Of The Rabbit, Francis Marsh Baldwin

Proceedings of the Iowa Academy of Science

Bensley in his Practical Anatomy of the Rabbit (p. 365), in discussing the blood vessels of the thorax describes the arch of the aorta as "beginning at the base of the heart, - - - -passes forward, and then describing a curve, in the course of which it lies slightly to the left of the median plane, turns backward along the ventral surfaces of the bodies of the thoracic vertebrae. With the exception of the coronary arteries the first branches are the large paired vessels arising from the anterior wall. They comprise the common carotid and subclavian arteries. On the …

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Miscellaneous Addresses, 1885-1920, Homer H. Seerley Jan 1920

Miscellaneous Addresses, 1885-1920, Homer H. Seerley

Faculty Book Gallery

Homer Horatio Seerley was the second chief administrator of UNI. His predecessor was James Cleland Gilchrist. Seerley led the school from 1886 to 1928.

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The Downy Brome Grass In Iowa, H. E. Jaques Jan 1920

The Downy Brome Grass In Iowa, H. E. Jaques

Proceedings of the Iowa Academy of Science

Our state has a number of troublesome weed grasses, worst of which at the present time is, likely, the Squirrel-tail Grass (Hordeum jubatum L.) which is now to be found almost everywhere within the state and is very annoying in crowding out better grasses and in injuring livestock. Only a few decades ago is was scarce within our borders. While theoretically it is easily controlled and though it is hated by farmers everywhere it thrives and extends its area every year. If the loss due to it could be computed it would doubtless prove to be heavy.

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The Normal Curve Of Acuity In Hearing, Paul B. Anderson Jan 1920

The Normal Curve Of Acuity In Hearing, Paul B. Anderson

Proceedings of the Iowa Academy of Science

The speaker reported on the establishment of norms on the basis of records made by Mr. Bunch with the Iowa Pitch Range Audiometer. The normal curve of acuity of hearing, based upon twenty-four cases of music pupils, was exhibited. In this figure the intensity of the sounds are on the scale of 1 to 6 as shown at the left, and pitches are denoted by vibration frequency as indicated by the numbers at the bottom. A graded series of norms is being established showing the norm for the best 10 per cent, the best 25 per cent, and the best …

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The School Of The Future, R. P. Crawford Jan 1920

The School Of The Future, R. P. Crawford

History of Education Book Gallery

An article from the June 1920 issue of Popular Educator, about the consolidation of rural schools in the Midwest.

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Symposium: Some Results Of Current Research In The Psychological Laboratory Of The State University Of Iowa, C. E. Seashore Jan 1920

Symposium: Some Results Of Current Research In The Psychological Laboratory Of The State University Of Iowa, C. E. Seashore

Proceedings of the Iowa Academy of Science

Investigations at the psychological laboratory are at the present time centering upon two general fields which are more or less closely related; namely, the Psychology of Music, and the Psychology of Basic Motor Capacities. The former is represented essentially by the first six titles, and the latter by the last six.

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The Talent Survey In Our Music School, Esther Allen Gaw Jan 1920

The Talent Survey In Our Music School, Esther Allen Gaw

Proceedings of the Iowa Academy of Science

The forty-six students who are majoring in music have been given a series of psychological tests during the year 1919-1920. The tests for sense of pitch, sense of intensity, sense of time, sense of consonance, and tonal memory were given not only to those majoring in music, but also to the large groups in harmony and history of music, by means of the phonograph disks. The large groups were also given the army intelligence test and the auditory imagery group test.

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Serial Action As A Basic Measure Of Motor Capacity, C. Frederick Hansen Jan 1920

Serial Action As A Basic Measure Of Motor Capacity, C. Frederick Hansen

Proceedings of the Iowa Academy of Science

Motor tests involving "continuous discriminative reactions" or "serial action" are being standardized by the psychologist with the end in view of reproducing, in dealing with his practical problems, the actual conditions of simple daily motor activities more closely than obtained in the traditional reaction time tests. These newer measures of motor capacity recognize the essentially fluid character of stimuli and reactions - their fundamentally continuous interplay, which is apparent not only in simple motor achievements like walking or handling tools, but also in the complex activities of the musician, the telegrapher, the typist, or the expert mechanician. In the analysis, …

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A Standardized Measure Of Motility, Merrill J. Ream Jan 1920

A Standardized Measure Of Motility, Merrill J. Ream

Proceedings of the Iowa Academy of Science

In any survey of the fundamental capacities of motor control the factor of speed of simple movement is obvious as one of the basic essentials which underlie all the developed complexities of movement. This fundamental capacity for speed in a simple repeated movement we call motility, and the motion selected is an easy movement of the forearm in which the finger taps a telegraph key. This type of movement is selected because it is one of the most rapid of the voluntary movements; it is clearly developed, is very simple, and requires no learning. It is assumed that the ability …

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Some Experiences With Laboratory Control Of Field Water Supplies, Jack J. Hinman Jr. Jan 1920

Some Experiences With Laboratory Control Of Field Water Supplies, Jack J. Hinman Jr.

Proceedings of the Iowa Academy of Science

The Water Analysis Laboratories of the American Expeditionary Forces began their work in January and February, 1918. The personnel consisted of Engineer and Medical Department officers and men. The Medical Department representatives were almost entirely from the Sanitary Corps and were furnished to the Engineer Department under provisions of G. 0. 108, War Department, Washington, 1917. The organization formed a part of the Water Supply Service which was built around the 26th Engineers, the Water Supply Regiment, as a nucleus.

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Cladocera Of The Okoboji Region, Frank A. Stromsten Jan 1920

Cladocera Of The Okoboji Region, Frank A. Stromsten

Proceedings of the Iowa Academy of Science

The following list of Cladocera is a continuation of the list published in the Proceedings of the Iowa Academy of Science for 1917. It represents the species collected during the summer of 1919, from June 24 to September 1.

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Copepoda Of The Okoboji Region, Frank A. Stromsten Jan 1920

Copepoda Of The Okoboji Region, Frank A. Stromsten

Proceedings of the Iowa Academy of Science

BRANCH= ARTHROPODA, Class: Crustacea, SUBCLASS: ENTOMOSTRACA, Order: COPEPODA, Suborder: Eucopepoda, Group: GNATHOSTOMA, FAMlLY:CENTROPAGIDAE, Genus Diaptomus

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The Rotatoria Of The Lake Okoboji Region, Dwight C. Ensign Jan 1920

The Rotatoria Of The Lake Okoboji Region, Dwight C. Ensign

Proceedings of the Iowa Academy of Science

This report is based upon a series of collections and studies made during the months of July and August, 1919, at the Iowa Lakeside Laboratory. It is incomplete, since numerous species which will doubtless be found in this locality have been missed by reason of the short time during which collections were made.

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Susceptible And Resistant Phases Of The Dividing Sea-Urchin Egg When Subjected To Various Concentrations Of Lipoid-Soluble Substances, Especially The Higher Alcohols, Francis Marsh Baldwin Jan 1920

Susceptible And Resistant Phases Of The Dividing Sea-Urchin Egg When Subjected To Various Concentrations Of Lipoid-Soluble Substances, Especially The Higher Alcohols, Francis Marsh Baldwin

Proceedings of the Iowa Academy of Science

That dividing Arbacia eggs show periods of varying susceptibility and resistance when exposed to chemical substances and to various physical conditions has been proved by numerous investigations. When eggs from a single fertilized lot were placed at regular successive intervals after fertilization in cyanide containing sea-water (m/100 to m/200), Lyon found that they were highly resistant to poisoning fifteen or twenty minutes after fertilization, while eggs exposed to the same solution at the time of cytoplasmic division were promptly killed. Later, after the first division had been completed, the resistance to poisoning again returned, followed by a second susceptible period …

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The Relative Position Of The Maxima Contractions Of The Amphibian Muscle When Subjected To Various Ranges In Temperature, Ralph L. Parker Jan 1920

The Relative Position Of The Maxima Contractions Of The Amphibian Muscle When Subjected To Various Ranges In Temperature, Ralph L. Parker

Proceedings of the Iowa Academy of Science

In the regular laboratory work in muscle-nerve physiology, it was noted that records obtained by subjecting frog muscles to various ranges of temperature did not exactly agree as to positions of maxima contractions with statements found in the texts, especially that of Howell. At the suggestion of Dr. F. M. Baldwin a fairly large series of experiments has been carried out to determine the relative positions of maxima contractions of the gastrocnemius muscle of the frog under varying temperature conditions, and to compare the results thus obtained with those of other investigators.

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Some Iowa Records Of Lepidoptera, A. W. Lindsey Jan 1920

Some Iowa Records Of Lepidoptera, A. W. Lindsey

Proceedings of the Iowa Academy of Science

My first contribution to the study of the Lepidoptera of Iowa appeared in the Proceedings of the Academy for 1914 in the form of a list of butterflies, exclusive of skippers, taken in Woodbury County (Proc. Ia. Acad. Sci. xxi, 1914, 341-346). Later I was able to complete the identification of the skippers in my possession and to examine a number of collections in various parts of the state, thus increasing my list to such an extent that in 1917 I published a second list, embracing the entire state and including all of the Diurnals (Ent. News xxviii, 1917, 347-353).While …

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A Study Of The Phylogeny Of The Anteoninae, F. A. Fenton Jan 1920

A Study Of The Phylogeny Of The Anteoninae, F. A. Fenton

Proceedings of the Iowa Academy of Science

A study of the biology of insect parasites and their relationships with that of their hosts offers a most attractive and productive field for research, and as yet, comparatively speaking, but little has been done in this field. This is particularly true with the Hymenoptera, and the writer has been interested in working out the biology of the Anteoninae, one of the parasitic groups of this order. These insects are parasitic on three families of the Homoptera, namely, the Cicadellidae, and Fulgoridae, commonly known as leafhoppers, and the Membracidae or treehoppers.

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A Biological Reconnaissance Of The Okefinokee Swamp In Georgia: The Fishes, E. L. Palmer, A. H. Wright Jan 1920

A Biological Reconnaissance Of The Okefinokee Swamp In Georgia: The Fishes, E. L. Palmer, A. H. Wright

Proceedings of the Iowa Academy of Science

From the earliest days of North American ichthyology to the present the fishes of South Carolina and North Carolina have received particular attention and in more recent times according to one author Florida fishes have attracted more general interest than those of any other state in the Union. Georgia forms by contrast have received scant attention and often have come into ichthyologic literature by inclusion in the range of northern species known from Florida or of southern species known from South Carolina and northward.

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Bird Records For The Season 1919-1920 In The Vicinity Of Iowa City, Dayton Stoner Jan 1920

Bird Records For The Season 1919-1920 In The Vicinity Of Iowa City, Dayton Stoner

Proceedings of the Iowa Academy of Science

Although the present report is based on notes and observations made, for the most part, in the vicinity of Iowa City, a few records are included from points some distance away. The records herein given cover the time between May 1, 1919, and March 10, 1920.

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An Intensive Ornithological Survey Of A Typical Square Mile Of Cultivated Prairie, Arthur R. Abel Jan 1920

An Intensive Ornithological Survey Of A Typical Square Mile Of Cultivated Prairie, Arthur R. Abel

Proceedings of the Iowa Academy of Science

The present paper is a report on an intensive ornithological survey of a typical section of prairie farm land in northwestern Iowa. In making the survey several objects were in view. Besides merely making a census, it was hoped that some light might be thrown on the relation of birds to various crops, the effect of constant tillage on bird life, etc. It was thought that the exact data accumulated now would furnish a basis for comparison at a future time. With some such means of measuring the actual increase or decrease of the bird population, we will be in …

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Bird Records Of The Past Two Winters, 1918-1920, In The Upper Missouri Valley, T. C. Stephens Jan 1920

Bird Records Of The Past Two Winters, 1918-1920, In The Upper Missouri Valley, T. C. Stephens

Proceedings of the Iowa Academy of Science

The area here considered includes northeastern Nebraska, northwestern Iowa, South Dakota, and southwestern Minnesota. From scattered points throughout this region specimens have been sent in to A. J. Anderson to be mounted, and it is through his courtesy that many of the records are here presented. Local records, in the vicinity of Sioux City, are made by the writer unless otherwise credited.

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Index Jan 1920

Index

Proceedings of the Iowa Academy of Science

No abstract provided.

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In Memoriam: Herbert R. Werner; R. Ellsworth Call, Albert Hartzell, Charles Keyes Jan 1920

In Memoriam: Herbert R. Werner; R. Ellsworth Call, Albert Hartzell, Charles Keyes

Proceedings of the Iowa Academy of Science

No abstract provided.

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The Teaching Of Plant Pathology, W. H. Davis Jan 1920

The Teaching Of Plant Pathology, W. H. Davis

Proceedings of the Iowa Academy of Science

It is not the intention of the writer to give an exhaustive treatise on the teaching of Plant Pathology but to stimulate thought for better methods of teaching, for broader presentation of the subject and for more practical courses.

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Some Alaska Fungi, J. P. Anderson Jan 1920

Some Alaska Fungi, J. P. Anderson

Proceedings of the Iowa Academy of Science

This list is based entirely on collections and observations by the writer. Only parasitic fungi and those appearing shortly after the death of the host plant are included, as these are the only ones to which sufficient attention has been paid. Quite a number of rusts (Uredinales) have been collected but are not included as it is the intention to list them in a separate paper. With few exceptions the fungi in this list are based on material collected at Sitka during the years 1914 to 1916 inclusive. The determinations were largely made by the U. S. Department of Agriculture …

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The Mechanical Penetration Of The Sweet Corn Pericarp, R. A. Rudnick, A. L. Bakke Jan 1920

The Mechanical Penetration Of The Sweet Corn Pericarp, R. A. Rudnick, A. L. Bakke

Proceedings of the Iowa Academy of Science

Hawkins and Harvey, Rosenbaum and Sando, and Hawkins and Sando have used a modified Joly balance fitted with a puncturing needle to determine the force necessary to puncture the cells of the potato tuber, tomato, and certain smaller fruits. For the penetration of these tissues a relatively small force is necessary.

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Nitrogen And Other Compounds In Rain And Snow, Jacob E. Trieschmann, Nicholas Knight Jan 1920

Nitrogen And Other Compounds In Rain And Snow, Jacob E. Trieschmann, Nicholas Knight

Proceedings of the Iowa Academy of Science

The importance of regularly analyzing the rain and snow for nitrogen and other compounds is widely recognized, both for its agricultural and hygienic significance. Messrs. F. T. Shutt and R. L. Dorrance of Ottawa, Canada, carried on a systematic investigation of the rain and snow through a period of ten years, 1908 to 1917, the results of which study have added much to our knowledge of the importance of the nitrogen compounds as an agricultural factor.

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Soft Water Of Central New York, Nicholas Knight, J. B. Shumaker Jan 1920

Soft Water Of Central New York, Nicholas Knight, J. B. Shumaker

Proceedings of the Iowa Academy of Science

The sample of water was taken from a well in the town of Sangerfield, Oneida County, New York, about a mile and a half south of the village of Waterville. It is located on the flat land in the bottom of the Sangerfield valley near the headwaters of Chenango River.

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