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The Structure Of Matter, L. Begeman Mar 1929

The Structure Of Matter, L. Begeman

Science Bulletin

At the present time, physical science recognizes the following divisions of matter: masses, molecules, atoms, electrons and protons. Matter appeals to us directly in the form of masses. We can readily sense a mass of water, a mass of air or a mass of iron; but it is quite different with the other divisions of matter. Molecules are so small that it takes about seventy billion billion of them laid side by side to extend through the length of one inch.

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Misconceptions Concerning Respiration, C. W. Lantz Mar 1929

Misconceptions Concerning Respiration, C. W. Lantz

Science Bulletin

The respiration of plants is misunderstood by a large majority of the students who enter our general botany classes in college. This misunderstanding is about as common among students who have had biological training in high school as among those who have not. I am also convinced that a very large majority of people, in general, not excluding college graduates, have the wrong conception of plant respiration. It seems that there must be something wrong with the teaching of this subject in our schools.

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A Bird Study Plan, Winifred Gilbert Mar 1929

A Bird Study Plan, Winifred Gilbert

Science Bulletin

Examination of the subject matter of the most commonly used general science texts in Iowa shows the topic of "bird life" to be meager or wholly lacking.

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Title - Masthead Mar 1929

Title - Masthead

Science Bulletin

A Service Bulletin for Teachers of High School Science.

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Science Bulletin, Vol.1 No.5, March 1929 [Complete Issue] Mar 1929

Science Bulletin, Vol.1 No.5, March 1929 [Complete Issue]

Science Bulletin

A Service Bulletin for Teachers of High School Science.

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The Molecular Kinetic Theory, L. Begeman Mar 1929

The Molecular Kinetic Theory, L. Begeman

Science Bulletin

Every teacher of elementary physics should have a thorough understanding of the molecular kinetic theory of matter since it is so indispensable in the explanation of various phenomena in physical science. One might even divide contemporary elementary physics into three divisions, viz: mass physics, molecular physics and electronic physics.

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The Open Season For Teachers: An Editorial Mar 1929

The Open Season For Teachers: An Editorial

Science Bulletin

The next three months arc anxious ones among our teachers. Some are seeking advancement; others are hoping for re-election; and many are looking for their first school. Chance will play an important part in many cases. The "influential third party" will land positions for some. But for most applicants desirable qualifications will be the largest factor.

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Improved Methods In Science Teaching, Louise Hearst Feb 1929

Improved Methods In Science Teaching, Louise Hearst

Science Bulletin

Pasteur has said that "in our century science is the soul of the prosperity of nations and the living source of all progress." Teachers of this important branch of knowledge, then, should carefully consider the methods of instruction in the science departments of our secondary schools. As these methods vary considerably, no general criticism of them will be attempted here. However there are certain fundamentals that merit attention, and in this paper we will examine three of them.

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Plant Study In General Science, C. W. Lantz Feb 1929

Plant Study In General Science, C. W. Lantz

Science Bulletin

The general science course in most high schools is conspicuous by its lack of plant study. Usually there is a brief study of micro-organisms, but the higher plant is often completely ignored. Why is this? Is it because the subject matter of plant study is of a special nature and is not of general importance? Ts it because plant study is not of interest and cannot be adapted to beginners in high school? Perchance it is because most of our general science textbooks have been written by physicists and chemists.

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Science Bulletin, Vol.1 No.4, February 1929 [Complete Issue] Feb 1929

Science Bulletin, Vol.1 No.4, February 1929 [Complete Issue]

Science Bulletin

A Service Bulletin for Teachers of High School Science.

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Laboratory Work In Poultry, H. Earl Rath Feb 1929

Laboratory Work In Poultry, H. Earl Rath

Science Bulletin

It is probable that the winter feeding, housing and management problems of poultry have been taken up in class before this time. If not, the alert agricultural instructor can develop some very practical laboratory work by conducting a survey in the community of the conditions under which poultry is kept, and then comparing the results obtained from flocks cared for under varying conditions.

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Simple Experiments To Show Atmospheric Pressure, L. Begeman Jan 1929

Simple Experiments To Show Atmospheric Pressure, L. Begeman

Science Bulletin

The teacher of general science in a small high school often lacks complete laboratory equipment, yet many experiments can be conducted, with simple, inexpensive, and readily available material. For the demonstration of atmospheric pressure, try the following experiments.

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Cockroaches For Laboratory Study, Roy L. Abbott Jan 1929

Cockroaches For Laboratory Study, Roy L. Abbott

Science Bulletin

Teachers of high school biology are often handicapped by a lack of living material. This is particularly true in the teaching of insects. Most texts in biology use the grasshopper as a type of insect, largely, I suppose, because of its familiarity to the average pupil.

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Laboratory Upkeep, R. W. Getchell Jan 1929

Laboratory Upkeep, R. W. Getchell

Science Bulletin

The article last month dealt with reagent bottles. Another problem is met in the proper care of iron ware - the special target of the corrosive laboratory fumes. To supply the pupil with rusty, oxide encrusted metal equipment is to encourage careless, slovenly work. An annual "paint day" is essential.

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The Copper Content Of Livers And Liver Extracts, G. N. Quam Jan 1929

The Copper Content Of Livers And Liver Extracts, G. N. Quam

Proceedings of the Iowa Academy of Science

Stated in mg. per kg. beef liver has been found to contain 16 to 30 mg. for the adult and for calf liver McHargue has reported 161.3 mg. while Robscheit-Robbins and others reported 145 mg. Adult hog liver yielded an average of 50 mg. per kg. A human fetal liver yielded 69.36 mg. per kg.; that of a still-born child 28 mg.; while an adult liver (cirhosis) 20 mg. Van Hallie and Van Eck reported 26.1 mg. per kg. for a still-born liver and White reported 19.1 mg. for an adult liver (sepsis).

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Science Bulletin, Vol.1 No.3, January 1929 [Complete Issue] Jan 1929

Science Bulletin, Vol.1 No.3, January 1929 [Complete Issue]

Science Bulletin

A Service Bulletin for Teachers of High School Science.

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Officers, Past Presidents, And Members, Iowa Academy Of Science Jan 1929

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

Proceedings of the Iowa Academy of Science

No abstract provided.

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Professor J. H. Paarmann, L. H. Pammel Jan 1929

Professor J. H. Paarmann, L. H. Pammel

Iowa Book Gallery

A brief biography of J.H. Paarmann, curator of the Davenport Academy.

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Abnormalities Found In A Two Headed Calf, Horace Essex, Marshall Huston Jan 1929

Abnormalities Found In A Two Headed Calf, Horace Essex, Marshall Huston

Proceedings of the Iowa Academy of Science

Whether nature had outdone herself or had attempted a bovine monstrosity was the subject of much discussion in our laboratory two weeks ago when a calf with two fully developed heads was brought to us. It was a Hereford calf born of a cow that had previously delivered four normal calves. Mr. F. L. Hultquist, the owner, who lives near Swedesburg asserts that the calf was alive in the early part of delivery, but was in an abnormal position in the uterus. The use of a block and tackle during delivery was probably the cause of its death.

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Development Of Imagination, Elizabeth G. Andrews Jan 1929

Development Of Imagination, Elizabeth G. Andrews

Proceedings of the Iowa Academy of Science

(The following paper is the report of a study in which an observational and a tachistoscopic method have been developed for the measurement of imagination in the preschool child. Since the research is still in progress the results are incomplete and the conclusions tentative.) For the purpose of this investigation we have chosen to define imagination as the synthetic process by which ideas are combined to form new products. It is by means of imagination that new thought is brought into existence. This new thought need not be new to the race, but it is new to the individual. It …

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On The Inheritance Of Resistance To Fowl Typhoid In Chickens, W. V. Lambert, C. W. Knox Jan 1929

On The Inheritance Of Resistance To Fowl Typhoid In Chickens, W. V. Lambert, C. W. Knox

Proceedings of the Iowa Academy of Science

Studies at the Iowa Experiment Station during 1927 and 1928 indicate very clearly that selection is effective in increasing resistance to this disease.

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The Synthesis Of 4-Hydroxy And 2-Hydroxy-Diphenyl Ketimines, Paul Vittum, Richard Anderson, J. B. Culbertson Jan 1929

The Synthesis Of 4-Hydroxy And 2-Hydroxy-Diphenyl Ketimines, Paul Vittum, Richard Anderson, J. B. Culbertson

Proceedings of the Iowa Academy of Science

These syntheses were carried out through the action of the corresponding hydroxy-nitrile upon magnesium phenyl bromide in an anhydrous ether medium. Over two equivalents of the Grignard reagent were employed, one to react with the phenol group and the other with the nitrile. The addition compound was decomposed with water and ammonium chloride at about -15 degrees C. The ketimine extracted with ether was precipitated as the hydrochloride by the addition of dry hydrogen chloride. The hydroxynitriles were prepared from the corresponding hydroxy-aldehydes by the action of acetic anhydride on their oximes. Some modifications were worked out in the preparation …

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Iowa State Teachers College Program Of Recitations, Winter 1928-29, Iowa State Teachers College Jan 1929

Iowa State Teachers College Program Of Recitations, Winter 1928-29, 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.

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Roster And Records Of Secretary: 1903-1929, Iowa Academy Of Science Jan 1929

Roster And Records Of Secretary: 1903-1929, Iowa Academy Of Science

Iowa Academy of Science Documents

Meeting minutes, conference programs, and more from the Iowa Academy of Science during the years 1903-1929.

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The Effect Of Manganese On The Growth Of Rats, V. E. Nelson, J. M. Evvard, W. E. Sewell Jan 1929

The Effect Of Manganese On The Growth Of Rats, V. E. Nelson, J. M. Evvard, W. E. Sewell

Proceedings of the Iowa Academy of Science

From the laboratories of Physiological Chemistry and Animal Husbandry, Iowa State College, Ames. Manganese in small amounts stimulated the growth of rats. The basal diet employed consisted of casein 18, years 12, cod liver oil 5, salts 185, 3.7, and dextrin 61.3. Manganese sulphate was fed at two levels, 100 and 600 parts per million of ration. In 56 days the control gained 1.78 grams daily and consumed 434 grams of feed per 100 of grain. On the smaller manganese allowance the gain was 2.06 grams, and the feed requirement was 391.4 grams for 100 gain. On the larger manganese …

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Snake Notes, J. E. Guthrie Jan 1929

Snake Notes, J. E. Guthrie

Proceedings of the Iowa Academy of Science

During the past six years there has been a rather unusual opportunity at the Department of Zoology and Entomology of Iowa State College for the study of snakes in captivity. By capture, donation, exchange and purchase, many specimens of more than fifty species have at different times been occupants of our cages. Of these, twenty species were natives of this state and included all but a few rare species of our snake fauna.

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The Sex Ratio In Guinea Pigs, R. G. Schott Jan 1929

The Sex Ratio In Guinea Pigs, R. G. Schott

Proceedings of the Iowa Academy of Science

The relative proportions of the sexes appearing in a total of 2,014 guinea pigs in the colony of the Department of Genetics, Iowa State College, over a six-year period have been studied. The ratio of males for the 2,014 animals was 49.4%. This is a close approach to the expected 50:50 relationship of the sexes as postulated by the sex-chromosome mechanism. Considerable seasonal fluctuation in the ratios were observed, but these are not consistent throughout the period. Age of parents, litter size, and litter sequence have no marked effect on the sex ratio.

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The Inheritance Of Leg-Feathering In The Chicken, W. V. Lambert, C. W. Knox Jan 1929

The Inheritance Of Leg-Feathering In The Chicken, W. V. Lambert, C. W. Knox

Proceedings of the Iowa Academy of Science

The inheritance of leg-feathering in crosses of the Black Langshan (feathered) with the White Plymouth Rock and Buff Orpington breeds (non-feathered) has been found to be dependent upon two dominant duplicate factors (S1 and S2). This relationship has been verified from data secured from F2 and backcross generations. Of five F1 males used in these studies three proved to be heterozygous for both factors S1 and S2 and two for but one of these factors, while six F1 females proved to be heterozygous for both factors and ten for but one factor. …

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What Are We Teaching In Biology?, C. W. Lantz Dec 1928

What Are We Teaching In Biology?, C. W. Lantz

Science Bulletin

This subject in order to be of real value must be an actual study of plants and animals. I have observed in my teaching that pupils, when given recognition characters of trees, may be able to pass a satisfactory examination on these characters, but fail to recognize the trees they describe when they see them in the field. They have simply memorized words that mean nothing to them.

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Highway Signs In Science Teaching, Winifred Gilbert Dec 1928

Highway Signs In Science Teaching, Winifred Gilbert

Science Bulletin

Let me assume that the General Science teachers of the state have been well prepared for their work and that at the present time they are more or less efficient teachers. Still there is the ever present task of keeping up with the curricular and learning studies that are going on in the field of General Science. New texts are appearing, yearly, new studies on content and methods seem to be on the increase and it takes rather nimble stepping on the part of the teacher to keep pace.

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