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A Hybrid Ragweed, Robert Bradford Wylie Jan 1915

A Hybrid Ragweed, Robert Bradford Wylie

Proceedings of the Iowa Academy of Science

During the summer of 1914 an unusual specimen of Ambrosia was noted which seems likely to have been a hybrid. The plant grew by the roadside on bottom land a few hundred yards from the Butler's Landing Bridge a couple of miles north of Iowa City. It stood near the foot of the long hill beyond the bridge and near the margin of the lowland. The location in the edge of the grading was favorable in that its soil received the wash from the higher land. The plant was surrounded by various weeds and among them and nearby were several …

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Notes On Certain Elastic Peculiarities Of Phosphor Bronze Wires, L. P. Sieg, A. J. Oehler Jan 1915

Notes On Certain Elastic Peculiarities Of Phosphor Bronze Wires, L. P. Sieg, A. J. Oehler

Proceedings of the Iowa Academy of Science

Some previous work by one of the authors with wires of an alloy of platinum-iridium, portions of which work were published in these Proceedings, indicated that when the wires were used as suspensions for torsion pendulums, the relations between the period of vibration and the amplitude were exceedingly complicated. The effect of drawing these wires was dealt with in another paper. In all these papers referred to, the statement was made that similar tests should be applied to some of the more common wires in the hope of finding similar, even though smaller effects. Through press of work these experiments …

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The Occurrence Of Barite In The Lead And Zinc District Of Iowa, Illinios And Wisconsin, W. D. Shipton Jan 1915

The Occurrence Of Barite In The Lead And Zinc District Of Iowa, Illinios And Wisconsin, W. D. Shipton

Proceedings of the Iowa Academy of Science

According to the reports of the Iowa, Illinois, and Wisconsin Geological Surveys natural crystals of barite are found rarely in the Lead and Zinc District of Iowa, Illinois, and Wisconsin. On account of the rarity of distinct crystals, considerable interest attaches to the finding of these crystals in this region at Hanover, Illinois. In the possession of Mr. T. D. Shipton of Hanover, are sixty or more well defined crystals of barite; it is to him that the writer is indebted for the material from which this paper was prepared.

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A Simple Device For Demonstrating The Tempered Scale, L. B. Spinney Jan 1915

A Simple Device For Demonstrating The Tempered Scale, L. B. Spinney

Proceedings of the Iowa Academy of Science

The diatomic scale consisting of a succession of eight tones and containing three intervals known as ''major second intervals,” two known as ''minor second intervals'' and two "half-tones," is not adapted to musical instruments of "fixed pitch'' (e.g. the piano, harp, etc.) for the reason that it does not without a multiplicity of keys (strings) allow of transposition or change of keys.

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The Theory Of Binaural Beats - An Experimental Contribution, G. W. Stewart, Harold Stiles Jan 1915

The Theory Of Binaural Beats - An Experimental Contribution, G. W. Stewart, Harold Stiles

Proceedings of the Iowa Academy of Science

The experiments here reported were performed in order to secure evidence concerning the cause of the additional maxima which occur in binaural heats. (See G. W. Stewart, Physical Review, Series 2, 3, p. 146, 1914, for a description of the phenomena.) These additional maxima occur at certain phase differences, and the change in these phase differences should depend upon the frequency of the tones, but not upon the frequency of the beats. If the additional maxima are caused by interaural conduction then, as it can be shown, the phase differences should vary as the frequencies. In the accompanying curve the …

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The First Coal Washing Plant In Iowa, George F. Kay Jan 1915

The First Coal Washing Plant In Iowa, George F. Kay

Proceedings of the Iowa Academy of Science

For more than fifty years in Europe, coals have been subjected to washing to improve their quality. Between 1870 and 1880, coal-washing plants began to be erected in America, and today coal-washing plants are being operated in many of the coal-producing states of the United States. In Iowa there is but one plant, and this has been completed within the past three years, actual washing having been begun in July, 1912. This plant is located at Lakonta, about twelve miles west of Oskaloosa, in Mahaska County, which is one of the leading coal-producing counties of the state. The plant is …

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The Ecological Histology Of Prairie Plants, Ella Shimek Jan 1915

The Ecological Histology Of Prairie Plants, Ella Shimek

Proceedings of the Iowa Academy of Science

The investigation, the result of a part of which is here presented, was made for the purpose of ascertaining the character of the various structural adaptations to environment which appear in the ordinary plants of our Iowa prairies. Of the 271 characteristic species of our prairies 65, representing a wide range of families and genera, were selected for these studies. The material for this purpose was collected on the dry prairie ridges or bluffs in Harrison county, and on the less rugged prairie in the vicinity of the Okoboji lakes, and at Iowa City.

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An Improved Heating Apparatus For Maintaining Constant Temperatures In Work With Polarimeters And Refactometers, J. N. Pearce Jan 1915

An Improved Heating Apparatus For Maintaining Constant Temperatures In Work With Polarimeters And Refactometers, J. N. Pearce

Proceedings of the Iowa Academy of Science

In the course of some work upon the effect of temperature upon the specific rotation of optically active substances in solution, it was found necessary to maintain constant temperatures over long periods of time. The conditions demanded that the heating apparatus be one which is simple and convenient and at the same time one which permits the easy reproduction of any given temperature.

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Pioneer Plants On A New Levee, Frank E. A. Thone Jan 1915

Pioneer Plants On A New Levee, Frank E. A. Thone

Proceedings of the Iowa Academy of Science

A year ago this spring the city of Des Moines cut a new channel and mouth for the Raccoon River, causing it to change its course for a distance of about half a mile and to empty into the Des Moines River a little more than half that distance below its old mouth. The bulk of the excavated material was piled upon the south bank of the new channel to form a levee about fifteen feet high, sixty feet wide at the base, and twelve feet wide at the top, with a space of twelve feet intervening between the foot …

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Acid Potassium And Acid Sodium Phthalates As Standards In Alkalimetry And Acidimetry, W. S. Hendrixson Jan 1915

Acid Potassium And Acid Sodium Phthalates As Standards In Alkalimetry And Acidimetry, W. S. Hendrixson

Proceedings of the Iowa Academy of Science

Quite recently Francis D. Dodge suggested acid potassium phthalate and acid sodium phthalate as standards in alkalimetry and acidimetry. His paper contains no analytical data and is largely theoretical, and so far as the writer can determine no such data are available. The two substances have certain very desirable features as standards, which Dodge has pointed out. The question is whether they are true acid salts. It seemed to me a matter of interest to subject them to a somewhat rigorous examination to determine whether they can be relied upon to give accurate results in standardization.

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Psychology Applied To The Measurement Of Merit Of Advertisements, Harry H. Gould Jan 1915

Psychology Applied To The Measurement Of Merit Of Advertisements, Harry H. Gould

Proceedings of the Iowa Academy of Science

The problem to be presented in this paper is that of measuring the relative merits of a series of advertisements. The advertisements are arranged in their order of merit with the best at one extreme, the poorest at the other, and the intervening ones in their ranking order as determined by the method of procedure used in the experiment.

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Early Iowa Locality Records, B. Shimek Jan 1915

Early Iowa Locality Records, B. Shimek

Proceedings of the Iowa Academy of Science

Students of plant and animal distribution are naturally interested in exact geographic designation, and they frequently suffer inconvenience from the inaccuracy or misconception of locality names. Confusion in our western records sometimes arises because the earlier explorers worked in an unsettled wilderness in which accurate geographic designation was difficult or impossible, and again from the fact that names were often at first applied to larger areas than those to which the name is at present restricted.

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Officers, Past Presidents, And Members, Iowa Academy Of Science Jan 1915

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

Proceedings of the Iowa Academy of Science

No abstract provided.

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The Flora Of The Rainy River Region, Harriette S. Kellogg Jan 1915

The Flora Of The Rainy River Region, Harriette S. Kellogg

Proceedings of the Iowa Academy of Science

There is no evidence accessible to the writer that a critical study of the flora of this region has ever been made, although several of the early explorers must have passed over this part of Minnesota.

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Preliminary Notes On Nectar Production, L. A. Kenoyer Jan 1915

Preliminary Notes On Nectar Production, L. A. Kenoyer

Proceedings of the Iowa Academy of Science

Few people realize the importance that the beekeeping industry is attaining in our state. For its size, Iowa is second in importance of the states of the union. The hives number into hundreds of thousands, and the value of the product probably into millions of dollars. Aside from this is the great indirect value which comes from the pollen-carrying of our bees.

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An Exobasidium On Armillaria, Guy West Wilson Jan 1915

An Exobasidium On Armillaria, Guy West Wilson

Proceedings of the Iowa Academy of Science

In one locality near Iowa City Armillaria mellia was attacked by a parasitic fungus which caused extensive hypertrophy of the upper region of the pileus of its host without rendering the gills sterile. The parasite developed a hymenium which spread over a series of thin, sharp-edged and highly convoluted ridges or gills. The microscopic characters show the fungus to be closely related to that which has been designated Exobasidium mycetophilum (Peck) Burt.

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Some Well Known Building Materials, Nicholas Knight Jan 1915

Some Well Known Building Materials, Nicholas Knight

Proceedings of the Iowa Academy of Science

A specimen of the rock of which the Houses of Parliament, London, are constructed was sent us some months ago, for analysis, by the Honorable John Burns, member of the British Cabinet. We had read in one of the popular magazines that the rock in the Parliament buildings is quite rapidly weathering and crumbling. We desired to make the chemical analysis to ascertain, if possible, the reason for the decay. The rock has a buff color when first quarried or on a fresh fracture, but it is darkened by the London smoke except in some of the protected angles. The …

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Foundation Of Exact Geologic Correlation, Charles Keyes Jan 1915

Foundation Of Exact Geologic Correlation, Charles Keyes

Proceedings of the Iowa Academy of Science

In the last generation or two there appears to have been little advancement made along lines of general geologic correlation. Two controlling reasons stand out prominently. On account of the fact that the criterion of fossils is so largely misused and is so generally unchecked by other critical criteria it is continually losing much of its former precedence. The adoption of the lithologic formation as the cartographic unit is also almost a complete failure for the reason that no account is taken of the change, replacement and effacement of its essential characters from place to place. All this confusion gives …

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A New Crinoid Fauna From Monticello, Iowa, A. O. Thomas Jan 1915

A New Crinoid Fauna From Monticello, Iowa, A. O. Thomas

Proceedings of the Iowa Academy of Science

The purpose of this paper is two-fold: first, to bring briefly before the members of the Academy the story of the discovery and a general description of an interesting but little known crinoid or sea-lily found some years ago near Monticello, and second, to call attention in a few words to some new inadunate crinoids recently collected by the writer in an outcrop of Silurian rocks at the same locality.

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Remarkable Prairie Synclinorium, Charles Keyes Jan 1915

Remarkable Prairie Synclinorium, Charles Keyes

Proceedings of the Iowa Academy of Science

In the last generation or two there appears to have been little advancement made along lines of general geologic correlation. Two controlling reasons stand out prominently. On account of the fact that the criterion of fossils is so largely misused and is so generally unchecked by other critical criteria it is continually losing much of its former precedence. The adoption of the lithologic formation as the cartographic unit is also almost a complete failure for the reason that no account is taken of the change, replacement and effacement of its essential characters from place to place. All this confusion gives …

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Notes On The Production And Some Electrical Properties Of Tellurium Crystals, W. E. Tisdale Jan 1915

Notes On The Production And Some Electrical Properties Of Tellurium Crystals, W. E. Tisdale

Proceedings of the Iowa Academy of Science

This report deals with the production of Tellurium crystals, and the effect of temperature on their electrical properties. An investigation of Tellurium was undertaken primarily to settle the question of its change of resistance with light, or its light sensitiveness. It occurs in the periodic table in the same column with Selenium, and in the same row with antimony, which elements show an effect on light sensitiveness. Adamsin 1876 made some experiments on Tellurium cells and reported ''a distinct though very slight influence of light on their conductivity". Siemens, Knox, and Saunders report that there is no effect of light …

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A Resonance Method For Measuring The Phase Difference Of Condensers, H. L. Dodge Jan 1915

A Resonance Method For Measuring The Phase Difference Of Condensers, H. L. Dodge

Proceedings of the Iowa Academy of Science

It is a well-known fact that when an alternating electromotive force is impressed upon a condenser the resulting current does not lead the electromotive force by the theoretical ninety degrees. This is particularly noticeable in the case of paper condensers of the telephone type so often used in laboratories for the study of the alternating current circuit. When an attempt is made to interpret such experiments by graphic methods it is sometimes found that the power factor of the condensers is so great that it must be taken into account. The power factor angle or the angle by which the …

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The Paleontology And Stratigraphy Of The Upper Carboniferous Of Iowa, Geo. L. Smith Jan 1915

The Paleontology And Stratigraphy Of The Upper Carboniferous Of Iowa, Geo. L. Smith

Proceedings of the Iowa Academy of Science

The object of this paper is to give the results of field observation and paleontologic study of the Upper Carboniferous of southwestern Iowa, extending over several years, as opportunity offered. It has been necessary that portions of the adjacent states of Missouri and Nebraska be included in this investigation, to complete and confirm the results obtained by studies of the stratigraphy of Iowa. Good exposures of outcrops in Iowa are infrequent and widely scattered; correlations are therefore difficult to make without the information to be derived from the examination of outcrops in adjacent territory.

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The Crow, Fred Berninghausen Jan 1915

The Crow, Fred Berninghausen

Proceedings of the Iowa Academy of Science

The crow is the most harmful bird. He feeds on carrion and also carries hog cholera by feeding on the dead hogs. He commences feeding at the ear arid there takes his fill, then flies from one farm to another and so carries the disease. Loss from hog cholera three years ago was ninety-nine thousand and nine hundred and ninety hogs; two years ago it amounted to one hundred forty-seven thousand six hundred and seventy. The crow will carry the foot and mouth disease in the same way and also destroys the newborn sheep in the pasture by picking out …

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Is The Appetite Of Swine A Reliable Indication Of Physiological Needs?, John M. Evvard Jan 1915

Is The Appetite Of Swine A Reliable Indication Of Physiological Needs?, John M. Evvard

Proceedings of the Iowa Academy of Science

The pig is farrowed with a fairly definite set of specifications for development all wrapped up in their mystery in a two to three pound bundle of throbbing, active "stuff." And yet before the pig sought the outer life apart from the womb of his dam, these specifications were enclosed in the minutest bit of protoplasm, the impregnate ovum resulting from the union of two germ cells, one from the male and the other from the female.

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Illustrated Review Showing Development Of The State Of Iowa, Earl J. Robinson & Co. Jan 1915

Illustrated Review Showing Development Of The State Of Iowa, Earl J. Robinson & Co.

Iowa Book Gallery

Descriptive text covering counties, cities and villages based on the latest official sources, with special articles by well known state authorities. Newly engraved charts showing principal automobile roads, including the Lincoln highway and its feeders, detailed railroad maps of every state with complete index, also maps of foreign countries.

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Table Of Contents Jan 1915

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

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Proceedings Of The Twenty-Ninth Annual Session Of The Iowa Academy Of Science: Staff & Committee Reports; Program Jan 1915

Proceedings Of The Twenty-Ninth Annual Session Of The Iowa Academy Of Science: Staff & Committee Reports; Program

Proceedings of the Iowa Academy of Science

No abstract provided.

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In Memoriam: Charles Edwin Bessey; David Macmillan Houghtelin, L. H. Pammel, John L. Tilton Jan 1915

In Memoriam: Charles Edwin Bessey; David Macmillan Houghtelin, L. H. Pammel, John L. Tilton

Proceedings of the Iowa Academy of Science

No abstract provided.

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The Inheritance Of Syndactylism, Henry Albert Jan 1915

The Inheritance Of Syndactylism, Henry Albert

Proceedings of the Iowa Academy of Science

An instance of thirteen cases of syndactylism (or fused or webbed fingers or toes), traced through four generations was reported. The element of heredity is obviously apparent. In view of the recent report of a family with cases of syndactylism in which the inheritance of the abnormal union of the digits apparently conformed to Mendel's law, as a dominant character, an effort was made to determine if the Mendelian law also applied to the cases in question. It was determined that although the disease was due to a factor which was apparently dominant rather than recessive it did not conform …

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