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Effect Of Temperature On Resistance And Specific Resistance Of Tellurium Crystals, Arthur R. Fortsch

Proceedings of the Iowa Academy of Science

In his Master's thesis Dr. Tisdale gives some results on the effect of temperature on the resistance of tellurium crystals. He finds a decided maximum at about zero degrees Centigrade.

Iowa State Teachers College Program Of Recitations, Fall 1918, Iowa State Teachers College

UNI Schedule of Classes

A listing and schedule of the courses being taught as well as policies and procedures concerning attending classes at the Iowa State Teachers College.

The Alumni News Letter, V2n3, July 1, 1918, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.

Spring Term Commencement [Program], June 6, 1918, Iowa State Teachers College

UNI Commencement Programs

The program of the commencement ceremonies, including a list of institutional leadership, a list of the departments by college, awards given at the ceremonies, and a list of undergraduate and graduate degree candidates.

College Catalog And Circular 1918, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents:

Calendar for 1918-1919 ... 6
Officers of Administration ... 6
Officers of Instruction ... 8
Plan of Organization ... 35
General Regulations ... 35
Faculty Regulations ... 38
Order and Deportment ... 38
Credits and Scheduling ... 38
Schedules, Credits, and Absences ... 39
Dismissals, Re-enrollments, and Unsatisfactory Work ... 39
Extension Service ... 39
Exchange of Students ... 40
Expenses and Fees ... 40
College Organizations ... 42
Training in Actual Teaching ... 43
Boarding and Lodging ... 44
Employment of Students ... 46
Admission Requirements ... 48
Definitions of College Terminology ... 49
Degrees, Diplomas, …

The Alumni News Letter, V2n2, April 1, 1918, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.

Iowa State Teachers College Program Of Recitations, Spring 1918, Iowa State Teachers College

UNI Schedule of Classes

A listing and schedule of the courses being taught as well as policies and procedures concerning attending classes at the Iowa State Teachers College.

In Memoriam: J. Howard Frazier; Glenn I. Tenney; Robert B. Dodson, L. H. Pammel, A. O. Thomas, G. W. Stewart

Proceedings of the Iowa Academy of Science

No abstract provided.

The Alumni News Letter, V2n1, January 1, 1918, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.

1918 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.

Temperature-Time Relations In Canned Foods During Sterilization, George E. Thompson

Proceedings of the Iowa Academy of Science

Bacteriologists have found that the death rate of the bacteria which cause spoilage in canned goods depends upon the temperature to which the bacteria are subjected. In order, therefore, to establish the bacteriology of canning on a firm scientific basis it is necessary to know the time at which certain critical temperatures are attained by the foods which are subjected to the sterilization process. This paper shows the result of an attempt to work out by a combination of mathematical theory and experiment the temperature-time curves for certain foods in containers of any size and for any practical temperature range.

Park Sites Along Des Moines Valley, James H. Lees

Proceedings of the Iowa Academy of Science

At a time when the establishment of State parks is a prominent subject of discussion among lovers of nature and those who are interested in the conservation and improvement of our resources, both tangible and intangible, it is natural that attention be directed toward the central and chief watercourse of the state in the search for suitable sites for recreation centers. So the question arises as to the possibilities for locating parks, state, district or county, along the valley of Des Moines river. A number of years ago the writer enjoyed the opportunity of making a study of the physical …

Note On The Tungsten X-Ray Spectrum (L-Series), O. B. Overn

Proceedings of the Iowa Academy of Science

A rather incomplete report of the work of Dershem on the X-ray spectrum of tungsten has appeared in the proceedings of the Iowa Academy of Science, A complete report is to be found in the Physical Review of June, 1918, where he finds this spectrum to contain 19 lines in the L region. Further experiments have been carried on using the same apparatus and method as used by Dershem, but increasing the time of exposure, with the result that six new lines have been discovered.

Iowa State Teachers College Program Of Recitations, Winter 1917-18, Iowa State Teachers College

UNI Schedule of Classes

A listing and schedule of the courses being taught as well as policies and procedures concerning attending classes at the Iowa State Teachers College.

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

Stroboscopic Velocities In The Tonoscope, H. R. Fossler, L. E. Dodd

Proceedings of the Iowa Academy of Science

The characteristic equation for stroboscopic velocity is v₈ = (A-n/m B) D₀ (see Proc. Iowa Acad. Sci., Vol. XXIV, 1917, p. 222), where v₈ is the stroboscopic velocity, A the frequency of the stroboscopic figures, B the frequency of illumination, n/m a fraction at lowest terms, and D₀ the distance of separation of the stroboscopic figures.

Provincial Unity Of Continental Interior Coal Fields, Charles Keyes

Proceedings of the Iowa Academy of Science

With their extreme simplicity of geological structure it seems almost incredible that the coal-fields of the Continental Interior should remain so long without even approximate correlation of their several parts. That the Arkansas district, the Western Interior area, the Eastern Interior field and the Michigan basin are essential parts of a single stratigraphic province there is now little reason to doubt. Recent regional planation manifestly separates a once continuous plate by removing the coal measures over the crests of broad gentle folds and preserving from the effects of erosion the deposits lying in the troughs.

Cumulative Index, Volumes I To Xxv, 1887-1918

Proceedings of the Iowa Academy of Science

No abstract provided.

A Study Of The Pollen And Pistils Of Apples In Relation To The Germination Of The Pollen, J. N. Martin, L. E. Yocum

Proceedings of the Iowa Academy of Science

The failure of a fruit tree to develop a normal amount of fruit may be due to a number of causes as stated by Kraus in volume VI of the Journal of Heredity. However, unless a plant develops fruit parthenocarpically, the development of fruit depends primarily upon how the pollen and pistil function relative to each other. As Kraus points out, fertilization by no means insures the development of a fruit, for very commonly the fruit does not develop despite the fact that normal fertilization occurred, but, on the other hand, in the absence of fertilization, fruit seldom develops among …

Some Problems Of Water Supply For Troops, Jack J. Hinman Jr.

Proceedings of the Iowa Academy of Science

The problems of water supply under field conditions are very different from those of the average city or town, even though the same fundamental principles apply to both. The city or town will in all probability make an extensive and careful survey of all water supply prospects and then choose that source which seems likely to offer the cheapest means of getting enough water that will be safe to use for drinking and other domestic purposes. Once the source is decided upon, expensive pumping and purification plants are erected and a complex distribution system is installed. A high degree of …

Legal And Political Status Of Women In Iowa, Ruth A. Gallaher

Iowa Book Gallery

The book attempts "to present a general survey of the status of women in Iowa by pointing out the distinctions between men and women which have been established by law or sanctioned by judicial rulings."

The President's Address - Does The History Of Science Have A Place In The College Curriculum?, L. S. Ross

Proceedings of the Iowa Academy of Science

In order to understand a government at any stage of its existence it is necessary to understand how it came to be, what were its antecedents and under what conditions it was developed. In short its inheritance and its environment must he known. No complete understanding of present day civilization is possible without a knowledge of the civilization of the "Men of the Old Stone Age" and of the various phases of man's attempts, failures and successes, between these two stages. In other words the master anatomist and physiologist must be an embryologist. To comprehend and understand the completed structure …

On The Coefficient Of Absorption Of Photoelectrons In Silver And Platinum, Otto Stuhlman Jr.

Proceedings of the Iowa Academy of Science

The coefficient of absorption can be defined by the constant ^α in the exponential relation N=N₀e-a^t. The precise physical interpretation of such an exponential law when applied to a beam of electrons moving through a metal plate of thickness "t" is not so simple as its mathematical expression would lead one to suppose. It may, however, lie interpreted if we assume that there exists no "scattering" or energy transformation as the beam of electrons passes through the metal. If ^α x is taken as that fraction of the number which is absorbed when the beam of …

The Life And Behavior Of The House Spider, H. E. Ewing

Proceedings of the Iowa Academy of Science

Few species of invertebrates come under our everyday observation more than the common house spider, Theridion tepidariorum K. It is a familiar object in attics and in basements, in cellars and in outhouses of all kinds, in fact it will be found in almost any of the situations where there is shelter and moisture, and where insects may be found in sufficient numbers for food. In looking up the literature relating to this spider the writer was surprised to find that no one, apparently, had worked out its life history or made systematic observations on its habits.

Notes On The Floristic Features Of A Prairie Province In Central Iowa, Ada Hayden

Proceedings of the Iowa Academy of Science

The primeval prairie of Iowa is fast vanishing. This region where grass grew tall and prairie fires yearly swept over expanses bounded by the horizon or broken here and there by zones of forest along the streams, man, one of the most important of ecological forces, has selected for his permanent habitat. The prairie of former years now lingers in small patches bounded by wire fences and known as hay fields; or where the less ambitious farmer has failed to insert an arterial system of tile, occasional sloughs and swamps furnish homes for hosts of sturdy cattails, slim reeds, plumy …

The Influence Of Floods Upon Animals, D. M. Brumfiel

Proceedings of the Iowa Academy of Science

The attention of the writer was first called directly to this problem by certain observations made along the White Water River, in southeastern Indiana, at the time of the great flood which swept that section of the country in the spring of 1913 —- generally known as the Dayton Flood. The writer was attempting to make collections of insects in the bottom lands of this small tributary of the Ohio river between the downpours of rain on Monday, March 24, 1913, at the time when that particular stream overflowed its banks. The observation that certain forms of animal life were …

Fall Term Commencement [Program], December 4, 1917, Iowa State Teachers College

UNI Commencement Programs

The program of the commencement ceremonies, including a list of institutional leadership, a list of the departments by college, awards given at the ceremonies, and a list of undergraduate and graduate degree candidates.

Iowa State Teachers College Program Of Recitations, Fall 1917, Iowa State Teachers College

UNI Schedule of Classes

A listing and schedule of the courses being taught as well as policies and procedures concerning attending classes at the Iowa State Teachers College.

The Alumni News Letter, V1n1, July 1, 1917, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.

College Catalog And Circular 1917, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents:

Calendar for 1917-1918 ... 6
Officers of Administration ... 6
Officers of Instruction ... 8
Faculty Committees ... 33
Plan of Organization ... 34
General Regulations ... 34
Faculty Regulations ... 37
Order and Deportment ... 37
Credits and Scheduling ... 37
Extension Service ... 38
Exchange of Students ... 38
Expenses and Fees ... 38
College Organizations ... 40
Training in Actual Teaching ... 41
Public Lectures and Entertainments ... 42
Boarding and Lodging ... 43
Employment of Students ... 44
Requirements for Admission ... 47
Definitions of College Terminology ... 48
Degrees, Diplomas, and Certificates …