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The Anatomy Of The Crowns And Roots Of The Annual And Biennial White Sweet Clover Compared, J. N. Martin

Proceedings of the Iowa Academy of Science

In case of the annual, all structures die at the end of first season's growth. In the biennial only the aerial shoot dies at end of first season's growth. The root and the crown of the biennial prepare, during the first season, for the second season's growth which consists chiefly in the development and fruiting of the flowering shoots that are present on the crown but held in check during first season's growth.

The Effect Of Physical Factors On The Development Of Woodland And Prairie Associations In Iowa, J. M. Aikman

Proceedings of the Iowa Academy of Science

The physical factors within the transition zone between the typical prairie association of the state and the deciduous forest communities occurring along the Des Moines River have been studied. The conditions for plant growth at the source of the river in northwestern Iowa have also been compared with those near the mouth of the river in southeastern Iowa. The purpose of this paper is to report the effect of the modification of factors on the distribution and grouping of woodland species and on the general reactions of the communities to the varying habitat factors.

The Selection Of Thermometers For General Organic Chemistry, Thomas H. Liggett

Proceedings of the Iowa Academy of Science

In selecting suitable thermometers for the use of students in General Organic Chemistry, it is often found that the ordinary chemical thermometers on the market at moderate prices have a number of defects. Some of these are as follows: 1. Graduation lines too close together, making reading difficult. 2. Lack of sufficient accuracy. 3. Stems too large, causing difficulty when more than one hole must be bored through a small cork.

Progress In The Analysis Of Cosmic-Ray Observations, Leroy D. Weld

Proceedings of the Iowa Academy of Science

The report herein contained is of a preliminary character, and is intended to exhibit only the first steps of the problem in hand. At the Des Moines meeting of the American Physical Society on Dec. 31 last, the writer presented a paper in which were set forth details of a method of treating the observations of Millikan and Cameron upon the absorption of the cosmic-rays, in order to render them susceptible to adjustment by the method of least squares.

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

Proceedings of the Iowa Academy of Science

No abstract provided.

Soil Bacteriology As A Science, P. E. Brown

Proceedings of the Iowa Academy of Science

Soil Bacteriology or Soil Microbiology as it is often called is the science which treats of the microorganisms in soils, their character, life-history and functions and their relationship to the fertility or crop-producing power of the soil.

The Food Selections Of Nursery School Children, Thomas F. Vance

Proceedings of the Iowa Academy of Science

The observations herewith reported were made during the Fall and Winter quarters of the school year 1929 and 1930 at the Nursey School of the Iowa State College. Twenty-seven children served as subjects during the first quarter and twenty-four for the second. Twenty-one were on the roll for both quarters.

Title - Masthead

Science Bulletin

A Service Bulletin for Teachers of High School Science.

Proceedings Of The Forty-Fourth Annual Meeting Of The Iowa Academy Of Science, Held At Ames, May 2 And 3, 1930: Minutes Of The Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

The Status Of The Biological Sciences In The High Schools Of Iowa, C. W. Lantz

Proceedings of the Iowa Academy of Science

In the germination tests of alfalfa seed in the spring of 1930, one seed was discovered with two embryos. They were both normal in all structures, equal in size and behaved normally in germination. Multiple embryo sacs in the ovules of alfalfa are frequent, but it has been supposed that not more than one is able to mature and function. The presence of two embryos is evidence that two embryo sacs may mature and function.

Base Exchange Between Dyes And Soils, Wilbur L. Hoff, J. A. Wilkinson

Proceedings of the Iowa Academy of Science

Beaumont, Rohland and Wilkinson and Hoff have shown the effect of acidity and alkalinity of solutions on the adsorption of dyes by soils. Ashley found that during the adsorption of basic dyes by soils the dyes exchanged some of their positive ions for the metal ions of the soil thus fixing some of the dye by base-exchange. Wilkinson and Hoff found that a methylene blue solution liberates more calcium and magnesium from a soil than does distilled water alone. Sante Mattson found in the case of two soils that the methylene blue adsorbed was approximately equivalent to the monovalent and …

Catalytic Hydrogenation Of Furfural, Ralph L. Van Peursem

Proceedings of the Iowa Academy of Science

A study was made of the possibility of producing the reduction products of furfural by passing its vapor, with an excess of hydrogen, over finely divided catalyst.

Some Physical Properties Of Concentrated Aqueous Salt Solutions, J. N. Pearce, Mildred A. Hooper

Proceedings of the Iowa Academy of Science

The densities and refractive indices were determined at 25° for solutions of the halides of some of the alkali metals, over a concentration range from 0.1 molal to almost saturation. The partial molal volumes were calculated by differentiating the equations of the volume-molality curves. From the refractive index the specific refractivity of the solution and of the solute were calculated. The specific refractivity of the solute was found to be constant throughout the concentrations studied. Using an equation derived by Hückel, involving the refractive index, the dielectric constants of the solutions were calculated.

College Catalogue 1929-1930, Iowa State Teachers College

UNI Programs and Courses Catalogs

Table of Contents

Calendar for 1930-31 ... 5
Officers of Administration and Instruction ... 6
Faculty ... 7
General Information ... 25
The School Plant and Location ... 25
History of the Institution ... 25
Extra-Curricular Activities ... 25
Expenses ... 28
Information of Special Interest to New Students ... 26
Expenses and Fees ... 28
Scholarships ... 30
Employment of Students ... 30
Loans ... 31
The Placement Bureau ... 31
Plan of Organization ... 32
Entrance Requirements ... 33
Advisers and Amount of Work ... 34
Absences and the Making up of Work ... 35
Grades and Scholarship …

The Air We Breathe, S. F. Hersey

Science Bulletin

In an examination of recent texts in general science one is impressed by the place given to a discussion and study of air in its various phases and applications. The expression "air minded" does not apply in this connection, but perhaps it holds true that a great amount of interest is always developed in pupils whenever we introduce the subject.

A Classified Bibliography Of References For General Agriculture, Winfield Scott

Science Bulletin

Most teachers are exceedingly busy with their regular duties in the school. This leaves but little time to look up references or for that matter to plan the work once the school year has begun. Their success is largely determined by the preparation which has been made before the school year opens. The following references have been prepared for these busy teachers who would like to enrich their courses in agriculture, but who do not have time to study or select references.

Exhibits As An Aid In Teaching, O. B. Read

Science Bulletin

Complaint is often made that science subjects are difficult to teach. Many feel they are so abstract that there is nothing tangible with which to start. Since most of our industrial products are now very closely controlled by physical principles and chemical processes, it ought not to be difficult in the study of these subjects to arouse interest by calling attention to their uses in the industrial process.

Science Bulletin, Vol.2 No.4, December 1929 [Complete Issue]

Science Bulletin

A Service Bulletin for Teachers of High School Science.

Living Material In The Laboratory, O. R. Clark

Science Bulletin

Living plants and animals serve as valuable aids in stimulating interest in the biology course and, during that part of the year when field trips are impossible, provide material for the study of habits and the relation of organisms to their environment. Laboratory conditions are of course artificial but they should be made as nearly natural as it is possible to make them.

Teaching The History Of Science

Science Bulletin

Science has contributed more to our comfort, well being, and happiness than any other branch of knowledge. The other branches of knowledge are now taking the scientific method for the solving of their problems. Is it not important that science teachers should find some place in their teaching to teach some of the history of the development of science?

Winter Bird Study

Science Bulletin

What birds are to be found in your vicinity during the winter months? We would like to have observers from different parts of Iowa report to us a list of the winter birds they find, giving us the date of observation and the locality. We will be glad to publish your reports.

Title - Masthead

Science Bulletin

A Service Bulletin for Teachers of High School Science.

Fall Term Commencement [Program], November 27, 1929, 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.

Science Bulletin, Vol.2 No.3, November 1929 [Complete Issue]

Science Bulletin

A Service Bulletin for Teachers of High School Science.

A Rare Opportunity Is Offered To All Teachers Of Science In Iowa Next Month

Science Bulletin

A rare opportunity is offered to all teachers of science in Iowa next month. The American Association for the Advancement of Science will hold its annual meeting in Des Moines from December 27 [1929] to January 2 [1930].

Title - Masthead

Science Bulletin

A Service Bulletin for Teachers of High School Science.

Heat, L. Begeman

Science Bulletin

The subject of heat as discussed in most texts in general science involves only the most elementary concepts as regards its theory. As a rule the following topics are the leading ones: - sources of heat, thermometry, methods of heat transmission, effect of heat, and a number of the common everyday practical applications of heat.

Insects And Man, Roy L. Abbott

Science Bulletin

Biologically speaking, insects may be called a highly successful group, and much of this success is due to their adaptability to the conditions of their environment. They are found everywhere, and eat almost everything. All of the large groups of insects are world-wide in their distribution, though the most widely distributed are the beetles.

The Simple Machines, L. Begeman

Science Bulletin

With reference to a pulley system, the work equation is clearly discerned in its practical operation. In presenting the pulley, the writer uses a rectangular frame about two feet high and three feet wide. A number of hooks are screwed into the top cross piece of the frame. With such a device a number of different pulley combinations can be shown at one time.

Science Minded, Harold E. Murphy

Science Bulletin

When we are trying to be "air minded " and "peace minded" why not go a little further and be 'science minded"? The aeronautic field has as its champion, Colonel Lindberg; the Peace Federation has as its champion, Ishbell McDonald; but where is the youthful champion of the field of chemical science? In this day of scientific advancement, a champion is surely needed to bring t h e achievement of chemical science to the people. Someone has said, "Science is the Creator's chest of tools. Human progress is man's learning to use these tools."