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The Occurrence Of Melanism In The Broad Winged Hawk (Buteo Latissimus), B. H. Bailey

Proceedings of the Iowa Academy of Science

During the fall of 1907 Mr. James Ward of Britt, Iowa, sent to the Coe College Museum a hawk of the Genus Buteo, that, because of its color, was difficult to identify. It was so similar to a specimen seen by the writer in the collection of mounted birds at the Smithsonian Museum in Washington, that at the suggestion of Mr. W. E. C. Todd of the Carnegie Museum at Pittsburg, it was sent to Mr. Robert Ridgway of the National Museum at Washington, where both these gentlemen affirmed that it is a Broad Winged Hawk in melanistic plumage.

A Study In Insect Parasitism, R. L. Webster

Proceedings of the Iowa Academy of Science

For a number of years the writer has been interested in insect parasitism and its relation to the control of injurious insects. Occasional notes have been made on different species of parasites and considerable interesting data has been obtained concerning the parasites of one of our common Iowa insects, the "tomato-worm," Phlegethontius sexta (Johanssen), sometimes called the "tobacco worm" or the "southern tobacco worm." It is with certain parasites of this particular insect with which this paper has to deal.

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.

College Catalog And Circular 1912-1913, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents:

Calendar for 1912-1913 ... 6
Officers of Administration ... 9
Officers of Instruction ... 9
Faculty Committees 1912-1913 ... 20
Plan of Organization ... 21
Organization of the Faculty ... 23
General Regulations ... 24
Faculty Regulations ... 27
Expenses and Fees ... 28
Literary Societies ... 31
Special Certificates ... 32
Training Department in Actual Teaching ... 34
Public Lectures and Entertainments ... 39
Boarding and Lodging ... 42
Requirements for Admission ... 44
Outline of the College Course ... 46
Distribution of Credits ... 47
Professional Course of Study for College Graduates ... 57
Special …

Greetings From Visiting Academies, L. H. Pammel, C. C. Nutting, A. E. Sheldon, Henry B. Ward

Proceedings of the Iowa Academy of Science

The St. Louis Academy of Science, the oldest academy west of the Mississippi, sends greetings to the Iowa Academy, its younger sister. We trust that the Iowa Academy of Science will in the future do as commendable work as it has in the past quarter of a century. We therefore send congratulations and hope that it may fill a large place in the science of this great commonwealth.

The Salem Limestone And Its Stratigraphic Relation In Southeastern Iowa, Francis M. Van Tuyl

Proceedings of the Iowa Academy of Science

While making a study of the Keokuk beds in southeastern Iowa during the field season of 1911, the writer was attracted by certain irregularities at the contact of those beds with the overlying strata. The Keokuk, instead of being followed always by the Warsaw, which is the normal order, was found to be succeeded above sometimes by a dense, white, fine-grained, non-fossiliferous limestone, and sometimes by a fossiliferous magnesian limestone or by an arenaceous phase into which it grades laterally.

The Effect Of Rupture By Abrasion On The Electrical Conductivity Of Selenium, F. C. Brown

Proceedings of the Iowa Academy of Science

Sometime ago while filing away the surface of the selenium in a Giltay cell in order to find out directly certain limits on the depth of penetration of selenium by light, I discovered a new effect. This effect of mechanical rupture on light-positive selenium resembles in a general way the many other well-known effects in these varieties of selenium. Rupture produces an increase in the conductivity, but this increase is not permanent. The recovery is extremely slow, often requiring more than a month for the selenium to attain the electrical condition existing before rupture. The experiments are especially interesting because …

The Harvest Mouse In Iowa, Frank C. Pellett

Proceedings of the Iowa Academy of Science

When the catalogue of the recent mammals of Iowa was compiled, (See Proc. Ia. Ac. Science, Vol. XVII, pps. 211 to 218), no record of the Western Harvest Mouse, (Reithrodontomys dychei Allen), could be found for this state, but because they were known to be common in eastern Kansas, they were included as likely to be found in Iowa. In making a study of the fauna of a limited region near Atlantic, I have found them to be abundant there, equaling the common white footed mouse. A few specimens were sent to the Biological Survey at Washington, and in …

The Source Of The Chromaffin Cells Of The Adrenals Of The Pig, Mildred Yule

Proceedings of the Iowa Academy of Science

That the adrenals of mammals consist of cortical and medullary portions is well known, but there has been considerable diversity of views as to the source of these, especially as to the source of the medullary portion or the chromaffin substance.

Ferns And Liverworts Of Grinnell And Vicinity, Henry S. Conard

Proceedings of the Iowa Academy of Science

The flora of the high prairie is peculiarly devoid of mosses and ferns. Excessive insolation and evaporation are prime causes of this. Though the necessary protection for mosses might be afforded by the tall grasses, the ground is too closely occupied, and moisture throughout much of the year is too scant.

Evidence Favoring The Radioactive Disintegration Of Sodium As An Element, F. C. Brown

Proceedings of the Iowa Academy of Science

By the usual test for radioactivity, i.e., the continued ionization of a gas independent of other physical conditions, sodium as an element does not display any activity that is definitely greater than that found in all matter. And the ionizing activity of ordinary matter is so slight that it cannot be stated with definiteness whether or not the matter is of itself radioactive. But radioactivity implies a more fundamental change than that of emitting matter and energy continuously. It implies an atomis disintegration. If α particles are emitted the atoms go by leaps and bounds to new atoms of other …

Title Page - Letter Of Transmittal, L. S. Ross

Proceedings of the Iowa Academy of Science

No abstract provided.

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

Proceedings of the Iowa Academy of Science

No abstract provided.

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

Proceedings Of The Twenty-Sixth Annual Session Of The Iowa Academy Of Science: Staff & Committee Reports; Constitution Of The Iowa Academy Of Science As Amended To 1912; Program, L. S. Ross, G. F. Kay

Proceedings of the Iowa Academy of Science

No abstract provided.

Anniversary Address Iowa Academy Of Science, Herbert Osborn

Proceedings of the Iowa Academy of Science

There is an old and familiar phrase which reads: To all to whom these presents may come, greeting. I remember how in youthful days this phrase struck me as of peculiar mold and how, without perhaps realizing its antiquity or history. I puzzled as to its full significance and the condition which in some distant era must have given it birth. We need not now attempt to trace its lineage or discover how ancient ambassadors or messengers may have used it in their visits to friend or foe, but I like to fancy for the moment that I am commissioned …

Charter Members Of The Iowa Academy Of Science, L. H. Parmmel

Proceedings of the Iowa Academy of Science

Two charter members of the Academy, Dr. Samuel Calvin and Professor J. E. Todd, were primarily geologists, both, however, had such good training in the old natural history courses given in our colleges forty and fifty years ago, that they became all-round naturalists. In the early days of teaching science in Iowa, when they did their pioneer work, they had the whole range of scientific instruction along the lines of natural history and natural science. In late years Dr. Calvin was primarily a geologist, never, however, losing interest in natural history. Several biographical sketches of the late Dr. Calvin have …

Twenty-Five Years Of Botany In Iowa, Thomas H. Macbride

Proceedings of the Iowa Academy of Science

To tell of Botany in Iowa for twenty-five years, even as presented in the work of members of this Academy, is a task far more difficult than would at first appear. Shall I present a list of all Iowa botany papers for a quarter of a century; such list would mean much indeed, and such list so far as attainable may be found as an appendix to the present paper. But the slightest reflection suggests that such list, long or short, is, as a matter of fact, no measure whatever of either the industry or the achievements of those who …

History Of Geology In Iowa For The Last Twenty-Five Years, Melvin F. Arey

Proceedings of the Iowa Academy of Science

This is so broad and full a subject that the necessary limitation of time and space will compel its treatment in a somewhat bald and meager manner. It is fitting that there should be given at the outset a brief statement of what had been accomplished previous to 1886-7. In 1839 Dr. D.D. Owen organized a corps of observers with whom he made a reconnaissance of portions of Iowa, Wisconsin and Illinois, the results of which were published in 1840 as a part of the senate documents. Several years later he revisited the state and the fruits of his survey …

The Progress In Physics In Iowa In The Quarter Century, Frank F. Almy

Proceedings of the Iowa Academy of Science

In attempting to outline the progress in Physics in the State of Iowa since the organization of the Iowa Academy of Sciences, it may be advisable to begin with some statement of the status of that subject in the State at that time. Note that this was six years before the writer, now selected as the patriarch of his group, entered the ranks of teachers of Physics in the State. I can hardly appropriate the term physicists, for, in the main, our work has been administrative and pedagogical.

The Progress Of Zoology In Iowa During The Last Twenty-Five Years, C. C. Nutting

Proceedings of the Iowa Academy of Science

In endeavoring to estimate the advance in a given science during a definite period of time and in a definite region, it seems evident that the best results can be obtained by ascertaining the work done by the representatives of that science in the region and during the time under consideration, and also the advance made in equipment in the institutions in which that science is taught.

The Late Blight Of Barley (Helminthosporium Teres Sacc.), A. L. Bakke

Proceedings of the Iowa Academy of Science

To the barley grower, no other disease of the barley is probably of such economic importance as the late blight (Helminthosporium teres). When active work was begun in the summer of 1909, certain barley plots of the college showed that more than 90 per cent of the plants in those plots were infected. The disease presents itself in the form of brownish, orange colored spots, which at first are oval or circular, but later become elongated. As a result of infection, the greater surface of the leaves takes on a yellowish color. In contrast to this effect is the brick …

Secotium Agaricoides, A Stalked Puffball, Henry S. Conard

Proceedings of the Iowa Academy of Science

Last autumn a considerable number of specimens of that odd fungus, Secotium agaricoides, were brought to our laboratory. It seems desirable to record the following observations:

Behavior Of Pollen Tubes In Richardia Africana., James Ellis Gow

Proceedings of the Iowa Academy of Science

During the past year the writer undertook an investigation of the morphology of Richardia africana, (the ordinary Calla Lilly, otherwise known as Calla ethiopica, or Zantedeschia africana), with a view of discovering what might be found relative to its life history, and comparing its life history with that of other Aroids. In at least one respect the results were curious and unexpected.

An Anomalous Ovary, James Ellis Gow

Proceedings of the Iowa Academy of Science

While engaged in a study of the Araceae the writer undertook to study some specimens of Stenospermation popayanense, which were kindly supplied by Mr. Fred J. Seaver, of the New York Botanical Gardens. The genus in question is described by all writers on the subject as having perfect flowers. Two species, other than the one mentioned, are described and figured by Schott in his Genera Aroidearum; but no description is there given of S. popayanense. The two species described have a unicarpellate ovary, with extremely thick wall, and four hypogenous stamens surrounding it. In one of the species, however, the …

Native Dye-Plants And Tan-Plants Of Iowa, With Notes On A Few Other Species, Harriette S. Kellogg

Proceedings of the Iowa Academy of Science

In early days, dyers depended almost entirely upon the vegetable kingdom as the source of their supply of coloring materials, the most important exceptions being sepia from a species of cuttle fish and Tyrian purple from the Murex. Feral plants were the chief reliance but the uncertainty of obtaining a sufficient amount of the raw material, as well as the inferior quality of much of that brought to the market together with the development of the science of organic chemistry led to the replacing of natural dyes with synthetic or artificial dyes.

Notes On Heteranthera Dubia, Robert B. Wylie

Proceedings of the Iowa Academy of Science

One of the common aquatic plants of our Iowa lakes is Heteranthera dubia (Jacq.) MacM. In the lakes of the Okoboji region this form is conspicuous along sheltered shores of suitable depth. While only sparingly present on the more exposed margins of the larger bodies of water it grows luxuriantly in the shallower bays and associated smaller lakes. In waters of appropriate depth considerable areas are often dominated by this form, sometimes to the exclusion of other large plants. During the summer of 1910 many acres of the "long slough" south of Center Lake were occupied almost exclusively by this …

The Effect Of Continued Grinding On Water Of Crystallization (Second Paper), Nicholas Knight

Proceedings of the Iowa Academy of Science

In the proceedings of the "Iowa Academy of Science," XVII, 131, we described a series of experiments to show the effect of long grinding on water of crystallization. Some of the results were rather surprising, and we decided to repeat the work, and also to include a larger number of hydrates in the experiments. The conditions under which the work was done were as uniform as possible. After grinding, the specimens were kept from the air in ground glass stoppered bottles of about 20 c.c. capacity. Gram portions were weighed out for all determinations. In finding the water content of …

Velocity Coefficients Of The Reaction Between Ethyl Iodide And Silver Nitrate In Ethyl And Methyl Alcohol And Mixtures Of These Solvents, J. N. Pearce, O. M. Weigle

Proceedings of the Iowa Academy of Science

The study of chemical reactions in various solvents is one that has been occupying the attention of chemists for a long time, for by this means it is thought that we may in time gain a closer insight into the mechanism of chemical reactions in general. A reaction frequently studied is that between alkyl halides and silver nitrate.

Sundry Provincial And Local Phases Of The General Geologic Section Of Iowa, Charles Keyes

Proceedings of the Iowa Academy of Science

In the consideration of the broader taxonomic aspects of the general geologic section of the rocks of our state two features in particular at once arrest attention. One of these features is the completeness and discrimination with which the glacial deposits have been differentiated so that the Iowa sequence becomes the standard Pleistocene section for this country. This is one of the distinct advancements recently made in American geology. For it credit is due mainly to workers in Iowa and especially to Iowa men.