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Science Bulletin, Vol.4 No.5, January 1932 [Complete Issue]

Science Bulletin

A Service Bulletin for Teachers of High School Science.

National Geography Meetings, Alison E. Aitchison

Science Bulletin

The Christmas vacation always brings a full quota of meetings of interest to those who are engaged in educational work. Especially does this seem true for those interested in science. Two meetings of value to geographers were held at Ypsilanti, Michigan, where the new Union building, an alumni project of the Michigan State Normal College, afforded an excellent meeting place.

The Lure Of The Turtle, Roy L. Abbott

Science Bulletin

I believe I never meet with a turtle without looking at him a second time at least, and I usually pick him up if I have an opportunity. For there is a lure about him, he attracts me powerfully though I can not tell just why. It may be partly admiration for his mighty ancestry, partly pity for his fallen estate, but some of it is just plain, everyday liking for his rather unprepossessing self. But there is plenty to see in him for all that!

Correlation Of Shape Of Fruits, Cotyledons And Seeds In Melons, Leslie M. Weetman

Proceedings of the Iowa Academy of Science

The following is a brief report of a statistical study of the relationship between shape of cotyledons, shape of fruits, and shape of seeds in melons and citrons. The ratio of width to length was used as an index of shape.

Iowa State Teachers College Program Of Recitations, Winter 1931-1932, 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.

Notes On Iowa Mosses. V., Lucy M. Cavanagh

Proceedings of the Iowa Academy of Science

Work during the past year on the collection of mosses in the Herbarium of the State University of Iowa has brought to light six species new to the state. Several other species, rare in the state, that have been found in new localities also seem worthy of note. The collections on which this report is based were made chiefly by Dr. B. Shimek, and the species here listed were collected by him unless otherwise specified.

Editor And Advisory Board

Science Bulletin

A Service Bulletin for Teachers of High School Science.

Title Page

Science Bulletin

A Service Bulletin for Teachers of High School Science.

Current Induction, L. Begeman

Science Bulletin

The modern transformer, now quite generally used in the commercial distribution of electrical power in the cities of the world, ranks next to the dynamo in importance in the electrical world. The transformer is an invention which embodies. the practical application of Faraday's first experiment in current induction, in which a closed iron ring carrying a primary coil and a secondary coil was used.

Officers And Past Presidents, Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.

The Effect Of Plant Cover On Soil Temperature, A. F. Dodge, J. M. Aikman

Proceedings of the Iowa Academy of Science

Soil temperature measurements made at Iowa State College in connection with studies in the germination of tree seeds, indicated that soil temperature at various depths under maple-linden cover was lower throughout the winter than it was under shrub cover (Meginnis). As this was at variance with measurements taken in the more mesophytic regions of eastern United States and Europe, a more careful study of the effect of different types of plant cover on soil temperature was considered advisable.

Iowa Plant Notes, V, R. I. Cratty

Proceedings of the Iowa Academy of Science

In a number of former papers the writer presented notes on new or otherwise noteworthy native and introduced plants of the Iowa flora, and he desires at this time to offer the 5th paper of the series, which concerns the following plants.

A Demonstration Of Dielectric Hysteresis In Rubber, W. D. Crozier

Proceedings of the Iowa Academy of Science

During research in connection with the development of an electrostatic loudspeaker, an effect was discovered which led to some measurements on the attractive force between plates in a flat condenser. With the dielectric between the plates consisting of a layer of rubber dam in combination with a layer of air, the curves of attractive force vs. potential difference show a striking similarity to magnetic hysteresis curves.

Birds Found Dead On Iowa Primary Roads, George O. Hendrickson

Proceedings of the Iowa Academy of Science

The author like many other auto drivers has for several years noticed dead birds on the primary roads so frequently that he began to count them and to meditate on the circumstances surrounding the accidents. From May to October, 1930, the readily recognizable birds were counted on 1,629 miles of Iowa primary roads traversed by auto at an average speed of 40 miles per hour. In a total of 58 dead birds, there were 28 red-headed woodpeckers (21 old, 7 young), 18 English sparrows, 5 pheasants, 3 flickers, l red-winged blackbird, 1 brown thrasher, 1 cedar waxwing and 1 robin.

The Alumnus, V16n1, January 1932, Iowa State Teachers College

The Alumnus

Inside This Issue:
-- Alumni Reorganization Planned
-- Alumni Pay Reverent Tribute to "First Teacher"
-- Alumni Reorganization Discussed at Dinner
-- "Be Human" Urges Speaker in Fall Term Address
-- Here's Help for Alumni Who Direct School Plays
-- Homecoming Scenes
-- News Items of the College
-- Basketball Squad Whips Pre-Holiday Foes
-- Purple Warriors Show Fight Despite Injuries
-- Alumni News
-- Marriages
-- Births
-- Deaths
-- Alumni Calendar of Events

Germination Studies Of Woody Plants, With Notes On Some Buried Seeds, C. M. King

Proceedings of the Iowa Academy of Science

Several contributions on seedlings have been presented to the Academy, by Dr. Pammel and Miss King. The present paper continues the series, with descriptions and drawings of a number of species of "woody plants." Some of the seeds used were collected by Dr. Pammel in the southwest in 1931. Some seedlings of ornamentals were furnished through courtesy of Professor Maney and Mr. Stoutemeyer. Other seeds were obtained from diverse sources.

Variation Of Acoustic Absorption Caused By Different Surface Treatments Of Insulation Board, H. J. Plagge, Edward Richard Wittemore, L. K. Arnold

Proceedings of the Iowa Academy of Science

An investigation was made of the acoustic absorption coefficient of insulation board made from cornstalk pulp. The chief interest was to investigate the change in absorption coefficient clue to progressive alteration of the surface of the board. The specimen boards were one foot square and one inch thick and the absorption was determined for plain board, beveled board, board with a few shallow grooves, with many grooves, and finally with deep grooves. These changes were made progressively on the same boards in order to eliminate variations caused by differences in structure which might otherwise occur.

1932 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.

A New Species Of Actinomyces Pathogenic In Man, C. H. Werkman, Roger Patrick

Proceedings of the Iowa Academy of Science

The organism which proved fatal to a boy of 14 was isolated under the direction of Dr. John Gammel of the Lakeside Hospital, Cleveland, Ohio, from a lesion measuring approximately 9 by 13 cm. located on the back. This large granulomatous process persisted for months; the central portion was ulcerated and freely exuded a tenacious, mucopurulent, sometimes blood streaked discharge. In the periphery there were several open and closed sinuses. Two biopsies revealed no actinomycotic granules although the organism was observed in sections of the granulomatous tissue. No granules were present in the morning discharge after washing with saline solution. …

Variations In The Viscosity Of Solution Cultures Of Rhizobium, D. A. Anderson, R. H. Walker

Proceedings of the Iowa Academy of Science

In the course of a study of the gum produced by the root nodule bacteria of legumes a close correlation was found to exist between the gum content of solution cultures of some species of Rhizobium and their viscosities as measured by means of an Ostwald viscosimeter. Certain cultures produced relatively viscid solutions while others showed practically no increased viscosity.

A Convenient Method For The Laboratoy Preparation Of Absolute Ethyl Alcohol, Thomas H. Liggett, Kenneth Dykstra

Proceedings of the Iowa Academy of Science

The rates of dehydration of ethyl alcohol of 95 per cent strength by calcium oxide were determined at 15°, 45°, and 78°. By two successive treatments for two months each with lime at room temperature, the alcohol was found to be dehydrated in a satisfactory manner. The same result was found to be accomplished at 45° by two treatments of one week each. In neither case is refluxing necessary.

Comparative Dissimilation Of Xylose And Glucose By Escherichia Coli And Citrobacter Anindolicum, O. L. Osburn, C. H. Werkman

Proceedings of the Iowa Academy of Science

The dissimilative action of Escherichia coli, Citrobacter anindolicum and various organisms of the intermediate groups on xylose and on dextrose was studied under comparable conditions with the aim of postulating a mechanism of the breakdown of the xylose molecule.

It was found in many cases that there were significant differences in the ratios of the end products obtained from the two sugars. The products found were H₂, CO₂, formic, acetic, lactic, and succinic acids, and ethyl alcohol. Acetaldehyde could be isolated by means of sodium bisulphite during the fermentative process.

The Reaction Of Chloroamines With Zinc Alkyls, George H. Coleman, Hans P. Andersen

Proceedings of the Iowa Academy of Science

The reaction of zinc ethyl has been studied with two monochloroamines and six dichloroamines in diethyl ether solution and in petroleum ether solution. The following yields illustrate the results obtained with dichloroamines in the two solvents. With i-amyldichloroamine in ether solution a 16 percent yield of i-amylethylamine was formed while in petroleum ether a 42 percent yield of this compound was obtained. There was no evidence of the formation of tertiary amines with any of the dichloroamines used. With the monochloroamines of the type R₂NCl the yields of tertiary amines were very small.

Limestone Boulders, Arthur Goshorn

Proceedings of the Iowa Academy of Science

An extensive layer of limestone boulders was exposed by the steam shovels in getting out crushed rock for Winterset streets and paving on U. S. Highway No. 169. The quarry is the old "Lime Kiln" quarry and is in Buffalo Hollow on No. 169 within the city limits.

A Note On Atmospheric Electricity And The Effect Of Electricity On The Growth Of Plants, L. W. Butler, C. S. Dorchester

Proceedings of the Iowa Academy of Science

Observations on the directions of current from earth to air have shown that up to July 1 there was little or no loss of negative charge. The weather from July 1 to September 15 was generally fair and during most of this period there was a very small loss of negative charge. At no time between September 15 and March 28 has there been any indication that the earth was losing negative charge, although there have been many days which would be classed as fair weather.

The Role Of Eye Movement Habits In Determining Reading Efficiency, Francis P. Robinson

Proceedings of the Iowa Academy of Science

Since there is a correlation of about.60 between reading comprehension and eye movements, it is of importance psychologically to understand the nature of this relationship. Three possible causal relationships may exist. First, comprehension may determine the action of the eyes in reading; second, certain functions of eye movement may determine reading efficiency; or third, some undescribed factor may affect each of these and account for the relationship.

Progress Report Of A Survey Of Iowa Insects, H. E. Jaques

Proceedings of the Iowa Academy of Science

At its meeting a year ago the Academy authorized a small research grant to help with what we have chosen to call an Iowa Insect Survey. Because of the co-partnership the Academy has had in the work and with the hope that the paper may possess considerable scientific interest and value, it has been chosen to report on the progress of the survey.

Index

Proceedings of the Iowa Academy of Science

No abstract provided.

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

Condensation Of Vanillin Substitution Products With Acetophenone, Glen V. Gundy, L. Chas. Raiford

Proceedings of the Iowa Academy of Science

It has been found that the bromine and chlorine substitution products of vanillin condense with acetophenone in the presence of sodium hydroxide to give mono- and diacetophenone derivatives. Of the vanillalacetophenones, the three monobromo-, the 2,6- and the 5,6-dibromo compounds are yellow; while the 2,5-dibromo and the 2,5,6-tribromo products are practically colorless. The chlorine compounds studied show similar differences. None of the diacetophenone compounds are colored. These products were prepared in order to obtain starting material with which to study further the rearrangement of hydrazones to pyrazolines.