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Proceedings Of The Thirty-Sixth Annual Session Of The Iowa Academy Of Science, Drake University, Des Moines, April 28 And 29, 1922: Minutes Of The Meeting; Staff & Committee Reports Jan 1922

Proceedings Of The Thirty-Sixth Annual Session Of The Iowa Academy Of Science, Drake University, Des Moines, April 28 And 29, 1922: Minutes Of The Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

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A Chemical Classification Of The Activities Of Soil Microorganisms, Paul Emerson Jan 1922

A Chemical Classification Of The Activities Of Soil Microorganisms, Paul Emerson

Proceedings of the Iowa Academy of Science

At the present time it may be said that the process of decomposition with its resultant complex chemical changes taking place in the soil is controlled primarily by the activities of micro-organisms and that Soil Fertility is mainly dependent upon these microscopic forms.

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Officers, Past Presidents, And Members, Iowa Academy Of Science Jan 1922

Officers, Past Presidents, And Members, Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.

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Table Of Contents Jan 1922

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

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Nest-Digging And Egg-Laying Habits Of Bell's Turtle, Frank A. Stromsten Jan 1922

Nest-Digging And Egg-Laying Habits Of Bell's Turtle, Frank A. Stromsten

Proceedings of the Iowa Academy of Science

During the summer of 1921 some forty or fifty Bell's turtles dug their nests on the side of a small hill just north of the Iowa Lakeside Laboratory. This afforded an excellent opportunity for the study of the nest-digging and egg-laying habits of this species of turtle. When the turtle is digging her nest or depositing her eggs she is not easily frightened so that it is possible to get very close to the animal and to use a flash light within an inch or two of the body. On several occasions a number of students at the Laboratory were …

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Chance In Development As A Cause Of Variation, P. W. Whiting Jan 1922

Chance In Development As A Cause Of Variation, P. W. Whiting

Proceedings of the Iowa Academy of Science

Variation is ordinarily considered as due to internal hereditary factors interacting with external environmental factors during development. In experimental work with a parasitic wasp considerable variation has been found in certain pure-bred stocks kept at certain constant environmental conditions. Either at other constant environmental conditions or in other pure-bred stocks this variation does not occur. Variation appearing under uniform conditions of heredity and environment is considered as due to slight irregularities of division and distribution of cells during embryology and to other more or less intangible factors of development. Individual variation resulting from chance in development is on the average …

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Some Wound Responses Of Foliage Leaves, Robert B. Wylie Jan 1922

Some Wound Responses Of Foliage Leaves, Robert B. Wylie

Proceedings of the Iowa Academy of Science

The leaves of plants are their most exposed organs. The thin summer foliage of herbaceous plants and deciduous trees generally suffers so severely that one rarely finds an uninjured leaf. While the degree of wounding is less serious in the evergreens, since they are tougher and offer greater resistance, lesions are not uncommon on these especially on the broader leaved evergreens. The plant's ability, therefore, to deal with such frequent accidents must be highly developed to meet these daily needs for renewed cortex.

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The Founders Of The Art Of Plant Breeding, Fred C. Werkenthin Jan 1922

The Founders Of The Art Of Plant Breeding, Fred C. Werkenthin

Proceedings of the Iowa Academy of Science

The paper by Prof. Werkenthin on History of Plant Breeding was one of the assigned topics in the course given at Iowa State College on the History of Botany. The subject matter is so admirably treated that it has seemed wise to publish this as a posthumous paper. It was the last paper prepared by him, finished only a few weeks before he was taken sick.

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Methods Of Teaching Parasitology, Herbert R. Werner Jan 1921

Methods Of Teaching Parasitology, Herbert R. Werner

Proceedings of the Iowa Academy of Science

The fact that animal parasites are important as disease producing agents has been known for a great many years. Thought, consideration, study, and emphasis on the question of parasitism have come in waves; at times it was looked upon as one of the most important factors to be dealt with, while at other times or periods it has received almost no attention and parasites have been looked upon as more or less unimportant as disease producing agents. But the necessity for the protection of our livestock from disease has grown, being governed largely by the supply and demand, together with …

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Concerning The Capacity Of Foliage Leaves To Withstand Wounding, Robert B. Wylie Jan 1921

Concerning The Capacity Of Foliage Leaves To Withstand Wounding, Robert B. Wylie

Proceedings of the Iowa Academy of Science

Foliage leaves are peculiarly liable to injury. From the nature of their work they are denied the protection given to older stems and larger roots. Their delicate structure not only invites insects, larvae, and other plant eating animals, but subjects them to repeated injury by purely mechanical agencies. Observation of leaves as they are found torn and mutilated in nature shows that they possess considerable power of adjustment to wounds and injuries.

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Notes On The Mammals Observed In Marshall County, Iowa, Ira N. Gabrielson Jan 1921

Notes On The Mammals Observed In Marshall County, Iowa, Ira N. Gabrielson

Proceedings of the Iowa Academy of Science

Few specific locality records for mammals in central Iowa have ever been published. The following brief notes, therefore, have been prepared for the purpose of making available for future workers on Iowan mammalogy the information I am able to give. This list is not complete but comprises only such notes and specimens as came to my hands in one way or another during three years' residence.

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Corn Oil Cake Meal For Growing And Fattening Pigs, John M. Evvard, Russell Dunn Jan 1921

Corn Oil Cake Meal For Growing And Fattening Pigs, John M. Evvard, Russell Dunn

Proceedings of the Iowa Academy of Science

Corn oil cake meal is really a residue of the germs of corn grain which remains after most of the oil is extracted therefrom. The particular corn oil cake meal which we used in our test is a by-product from the manufacture of glucose. These four main products are made from the corn grain: Glucose, corn oil, gluten feed, and corn oil cake meal. It is with the latter that we are to deal.

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Some Proboscidian Remains Found In Henry County, H. E. Jaques Jan 1921

Some Proboscidian Remains Found In Henry County, H. E. Jaques

Proceedings of the Iowa Academy of Science

Rather frequent discoveries of the remains of at least two species of the extinct elephant-like animals which inhabited this continent during the Pleistocene have been made in Henry County. These specimens have been found in several parts of the county, and have usually been limited to tusks and teeth. A number of bones have been found but in most cases in such condition as to make identification difficult. At least two of these finds are sufficiently noteworthy to deserve some permanent record.

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Analysis Of Certain Smooth Muscle Responses, B. M. Harrison, Francis M. Baldwin Jan 1921

Analysis Of Certain Smooth Muscle Responses, B. M. Harrison, Francis M. Baldwin

Proceedings of the Iowa Academy of Science

The fact that smooth muscles differ fundamentally in their structure from the cross-striated form, and that they possess distinctive physiological properties, especially in their toxicity, rhythm and rate of response, has made them the object of rather extended investigations. It is not necessary here to review extensively the literature dealing with the various points of attack contributory to an understanding of the responses of such elements. The present paper is a preliminary report of an attempt to analyze the responses of smooth muscles when subjected to different conditions, and especially when immersed in solutions of computed strengths of the alcohols, …

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The Readjustment Of The Peripheral Lung Motor Mechanism After Bilateral Vagotomy, T. L. Patterson Jan 1921

The Readjustment Of The Peripheral Lung Motor Mechanism After Bilateral Vagotomy, T. L. Patterson

Proceedings of the Iowa Academy of Science

It has been shown by Carlson and Luckhardt (1) in crucial experiments (1 to 2 hours) that destruction of the medulla or section of the vagi in the frog leads immediately to a permanent hypertonus or incomplete tetanus of the lung neuro-muscular mechanism, which makes the lung practically non-functional and useless as a respiratory organ. The present work however, was undertaken with the idea of ascertaining whether this hypertonic condition observed by these authors is permanent or temporary.

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Alcohols As Factors Altering Fatigue Processes In Frog Muscle, Francis Marsh Baldwin Jan 1921

Alcohols As Factors Altering Fatigue Processes In Frog Muscle, Francis Marsh Baldwin

Proceedings of the Iowa Academy of Science

In a recent paper experiments were cited which indicate that developing sea-urchin eggs when subjected to suitable concentrations of various liquid-soluble substances, i.e., the higher alcohols, show unmistakable rhythms of susceptibility and resistance according to the phase of physiological activity at the specific time of treatment. Such observations constitute additional evidence that a very intimate relation or correlation exists between the general physiological condition of the egg, and the physical state of its plasma-membrane. The present paper is a preliminary report of experiments conducted in the light of recent advances to analyze the effects of various concentrations of the alcohols …

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Studies Of The Phycomycetes Of Iowa, J. M. Raeder Jan 1921

Studies Of The Phycomycetes Of Iowa, J. M. Raeder

Proceedings of the Iowa Academy of Science

Numerous papers and valuable collections of the Fungus Flora of the state have been contributed by earlier botanists. Due to the effort of such men as Halsted, Bessey, Arthur, Hitchcock, Holway and Pammel, a collection of over 200,000 specimens of the fungi of the state is assembled in the herbarium of Iowa State College and other prominent herbaria in America. These collections are listed and described in various papers which are scattered in numerous publications over a period of a half century. It is obvious, then, that in order that such material be of value to students of mycology, it …

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The Alumni News Letter, V4n3, July 1, 1920, Iowa State Teachers College Jul 1920

The Alumni News Letter, V4n3, July 1, 1920, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.

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The Major Vegetation Of Lake Okoboji, Robert B. Wylie Jan 1920

The Major Vegetation Of Lake Okoboji, Robert B. Wylie

Proceedings of the Iowa Academy of Science

The major vegetation of Lake Okoboji consists chiefly of submersed seed plants. The algae are always in evidence and play an important part in the life of the lake since they are used as food by many lower animals, but with the exception of Chara they are seldom conspicuous and never large.

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A Study Of Sociality In The Madreporaria, Gertrude Van Wagenen, H. J. Wehman Jan 1920

A Study Of Sociality In The Madreporaria, Gertrude Van Wagenen, H. J. Wehman

Proceedings of the Iowa Academy of Science

The type of sociality found in the Madreporaria is necessarily primitive. While we were making this study two criteria of sociality have been adopted and applied: first, the proximity of one corallite to another; second, organic communication between associated polyps and corallites. As the two criteria indicate, sociality is examined from the standpoint of morphology of hard parts. This is necessary because of the extent of the field covered, the absence of live specimens, and the inclusion of fossils.

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1920 Old Gold, Iowa State Teachers College Jan 1920

1920 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.

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A Note Of Progress On The Study Of The Iowan-Wisconsin Borders, E. J. Cable Jan 1920

A Note Of Progress On The Study Of The Iowan-Wisconsin Borders, E. J. Cable

Proceedings of the Iowa Academy of Science

During the past year the writer has found some time to continue his investigations of the Iowan and Wisconsin borders. As stated in a former article, there is a strong field of evidence that the Iowan margin in Hardin and Grundy counties will need to be revised, especially in the vicinity of Eldora, Hardin County. Owing to the thinness of the Iowan drift, the high state of its weathering, and its complex relations to the loess, much more detailed work will be necessary before a definite boundary can be determined upon.

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Proceedings Of The Thirty-Fourth Annual Session (Of The Iowa Academy Of Science), Held At Iowa City, April 23 And 24, 1920: Minutes Of The Meeting; Staff & Committee Reports Jan 1920

Proceedings Of The Thirty-Fourth Annual Session (Of The Iowa Academy Of Science), Held At Iowa City, April 23 And 24, 1920: Minutes Of The Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

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The Address Of The President - The Taxonomic Unit, T. C. Stephens Jan 1920

The Address Of The President - The Taxonomic Unit, T. C. Stephens

Proceedings of the Iowa Academy of Science

The retiring president is expected to follow the custom of addressing the Academy upon some subject of general interest. Fortunately, custom does not require that such an address shall embody one's own research or investigation; but it may consist of a survey, or of reflections of a general nature. It so happens that certain fields in which I have been somewhat interested have brought me to a study of the problem of the taxonomic unit in biology.

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Agricultural Geology, John E. Smith Jan 1920

Agricultural Geology, John E. Smith

Proceedings of the Iowa Academy of Science

During reconstruction, as the present period is frequently termed, many new applications of the principles of pure science to special fields of endeavor are being made. The principles of geology thus applied during recent years have given rise to economic geology, mining geology, engineering geology, oil geology and perhaps to that branch of the subject indicated by the above title, for it is not entirely new. The application of the principles of the science to the solution of the geological problems that are met in agricultural enterprises and pursuits, in brief, the relation of geology to rural welfare may appropriately …

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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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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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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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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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