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Proceedings Of The Fiftieth Annual Meeting Of The Iowa Academy Of Science, Held At Iowa City, April 3 And 4, 1936: Minutes Of The 1936 Meeting; Staff & Committee Reports Jan 1936

Proceedings Of The Fiftieth Annual Meeting Of The Iowa Academy Of Science, Held At Iowa City, April 3 And 4, 1936: Minutes Of The 1936 Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.

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Research Vs. Conservation, W. W. Aitken Jan 1936

Research Vs. Conservation, W. W. Aitken

Proceedings of the Iowa Academy of Science

Conservation defined, means to supervise and protect. The supervising and protecting of wild life requires a knowledge of life history, habits, and daily activity of the particular objects under observation. This information is only gained after study and research into all factors effecting the life of plant and animal.

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Records Of A Dodder Gall-Weevil In Iowa, Henry Lee Dean Jan 1936

Records Of A Dodder Gall-Weevil In Iowa, Henry Lee Dean

Proceedings of the Iowa Academy of Science

Beguinot (1) early described the morphology and anatomy of galls induced on Cuscuta by species of Smicronyx, the genus containing the dodder gall-weevils. Yuncker (4) referred to swellings on stems and flower pedicels of dried herbarium material of Cuscuta and suggested that these galls were caused by an insect, then unidentified because of the condition of the specimens. Weiss and West (3) described galls from Monmouth Junction, New Jersey, on Cuscuta cephalanthi Englm. caused by the dodder gall-weevil, Smicronyx sculpticollis Casey. Gertz (2) reported galls from Sweden on the stems and flower pedicels of Cuscuta europaea L. caused by another …

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The Life Cycle Of Cryptococcus Hominis, Ramona L. Todd Jan 1936

The Life Cycle Of Cryptococcus Hominis, Ramona L. Todd

Proceedings of the Iowa Academy of Science

Two groups of fungi which include organisms pathogenic for humans have received some attention from medical men in recent years. These groups, the true yeasts and the false yeasts, have been studied only superficially from a standpoint of morphology and taxonomic relationships; hence, the classification and nomenclature, particularly of the false yeasts, has been in a state of confusion. The true yeasts, those which produce ascospores and form no mycelium, are placed in the family Saccharomycetaceae, order Endomycetales, class Ascomycetes. The yeast-like organisms for which no perfect stage has been demonstrated are grouped in one form family (given various names …

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Progress In The Regeneration Of The Prairie At The Iowa Lakeside Laboratory, W. A. Anderson Jan 1936

Progress In The Regeneration Of The Prairie At The Iowa Lakeside Laboratory, W. A. Anderson

Proceedings of the Iowa Academy of Science

The prairie tract owned by the Iowa Lakeside Laboratory lies northwest of Miller's Bay, West Okoboji Lake, in Section 23, T. 99 N., R. XXXVII W., Dickson County, Iowa. It covers approximately sixty acres of irregular surface, which drains toward the southeast into the bay. There are several more or less prominent morainic knobs in the tract. Three springy places support hanging bogs, each with its little stream draining into the lake; another tiny bog has no outlet. A shallow pond on the extreme western edge of the tract has been drained by highway ditches and is practically extinct. The …

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Introduction Of Aquatic Plants Into The Artificial Lakes Of Iowa, W. W. Aitken Jan 1936

Introduction Of Aquatic Plants Into The Artificial Lakes Of Iowa, W. W. Aitken

Proceedings of the Iowa Academy of Science

From a study of the reservoirs in southern Iowa, created by damming streams, it is apparent that aquatic vegetation should be introduced into the new artificial lakes to accelerate natural succession. As the areas are created for fishing lakes, a demand is made by the public to open them to fishing as soon as the fish have reached a takable population.

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Specificity Of Three Wood-Destroying Fungi For Gymnosperm And Angiosperm Woods, H. H. Lafuze Jan 1936

Specificity Of Three Wood-Destroying Fungi For Gymnosperm And Angiosperm Woods, H. H. Lafuze

Proceedings of the Iowa Academy of Science

Certain differences in nutritional characteristics of Polyporus betulinus Fr., Polystictus versicolor Fr. and Fomes pinicola (Fr.) Cooke appeared to be correlated with differences in chemical analyses of Gymnosperm and Angiosperm woods. Worthy of special mention were the water soluble extractives containing simpler carbohydrates and the pentoses in coniferous woods, the commonest hosts of F. pinicola. This organism and also the birch fungus, P. betulinus, showed high reductase activity, a phenomenon reported common in brown rot fungi on Gymnosperm, birch and alder woods. In contrast, P. versicolor, which attacks a wide variety of angiosperm woods in nature, displayed a high oxidase …

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Studies On Sporobolomyces And Bullera, H. C. Olson Jan 1936

Studies On Sporobolomyces And Bullera, H. C. Olson

Proceedings of the Iowa Academy of Science

Thirty-two cultures of spore-discharging false yeasts were isolated from the air and from other sources examined. Detailed studies identified twenty-six of the cultures as members of the genus Sporobolomyces and the remaining six as members of the genus Bullera. Twelve of the cultures of Sporobolomyces were classified as S. salmonicolor, eleven as S. roseus and the remaining three cultures apparently constitute a new species. The six cultures of Bullera were all identified as B. alba. Considerable variation was noted among the cultures of each species of Sporobolomyces and Bullera but, since marked variations in a culture could be induced by …

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The Postglacial History Of The Forest Of Northwestern Wisconsin, L. R. Wilson Jan 1936

The Postglacial History Of The Forest Of Northwestern Wisconsin, L. R. Wilson

Proceedings of the Iowa Academy of Science

The microfossil succession in ten bog deposits of northwestern Wisconsin was determined in an effort to trace the post Pleistocene floral history in that region. The deposits were selected with reference to the shorelines of Glacial Lakes Duluth, Algonquin, and Nipissing in order that stratigraphic comparison of the fossils might be accomplished. These comparative studies indicate that upon each area of land that was progressively uncovered by the waters of the glacial lakes there developed a pioneer forest of Picca and the subsequent development upon these areas appears to have been in response to the soils. The general forest succession …

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The Determination Of Potassium As Triple Nitrites, Everett F. Kelm, J. A. Wilkinson Jan 1936

The Determination Of Potassium As Triple Nitrites, Everett F. Kelm, J. A. Wilkinson

Proceedings of the Iowa Academy of Science

Cuttica,1 Bulli and Fernandes,2 have reported the use of the triple nitrite compound, K2PbCo(NO2)6 as a sensitive test for the qualitative detection of potassium. They report a sensitivity of 1 part potassium in 10,000 parts water.

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The Refractive Indices Of Alcohol-Water Mixture At 25º C, W. C. Oelke, Roger Arnold Jan 1936

The Refractive Indices Of Alcohol-Water Mixture At 25º C, W. C. Oelke, Roger Arnold

Proceedings of the Iowa Academy of Science

The purpose of this project was to obtain a basis for the development of a laboratory experiment in Physical Chemistry on Minimum Boiling Mixtures. Alcohol and water were selected as the liquids to be used. The simplest and most accurate method for the determination of alcoholic percentage in such mixtures is by the means of refractive indices.

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The Effect Of Gelatin On The Solubility Of Thallous Salts In Water, W. G. Eversole, F. S. Thomas Jan 1936

The Effect Of Gelatin On The Solubility Of Thallous Salts In Water, W. G. Eversole, F. S. Thomas

Proceedings of the Iowa Academy of Science

The solubilities of thallous salts were determined in various concentrations of solutions of iso-electric gelatin by saturating the gelatin solution with the salt at 40°C., filtering, and analyzing the solution for thallium and nitrogen content. From these analyses the concentrations of gelatin, water and salt were calculated.

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Binary Systems With Acetamide, Robert Butikofer, Ben H. Peterson Jan 1936

Binary Systems With Acetamide, Robert Butikofer, Ben H. Peterson

Proceedings of the Iowa Academy of Science

The system acetamide - propionamide was investigated by the freezing point method. The solubility curve obtained showed a eutectic at approximately 0.5 mol. fraction. The experimentally determined solubility curve corresponds well with the ideal solubility calculated from the ideal equation.

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The Preparation And Analysis Of Monobromoamine, Dibromoamine, Monochloroamine, And Nitrosylchloride, George H. Coleman, Gilbert E. Goheen Jan 1936

The Preparation And Analysis Of Monobromoamine, Dibromoamine, Monochloroamine, And Nitrosylchloride, George H. Coleman, Gilbert E. Goheen

Proceedings of the Iowa Academy of Science

Monobromoamine and dibromoamine were prepared in ether solution by the reaction of bromine with ammonia in ether solution at the temperature attainable with a mixture of dry ice and acetone. An ethereal solution of monochloroamine in concentration of one mole per liter was prepared by the action of sodium hypochlorite on ammonia. Pure liquid nitrosyl chloride was prepared by the action of dry hydrogen chloride with nitrosyl sulfuric acid. Apparatus and methods for the preparation, purification, and analysis of these substances were illustrated and described.

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Studies On The Removal Of Fluorine From Drinking Waters In The State Of Iowa, C. A. Kempf, W. E. Galligan, D. A. Greenwood, V. E. Nelson Jan 1936

Studies On The Removal Of Fluorine From Drinking Waters In The State Of Iowa, C. A. Kempf, W. E. Galligan, D. A. Greenwood, V. E. Nelson

Proceedings of the Iowa Academy of Science

Our knowledge concerning the distribution of fluorine in drinking waters and the effect of such waters on the structure of the teeth has been appreciably expanded by the recent researches of Smith, Lantz, and Smith (1), Churchill (2), McKay (3), Kehr (4), Ostrem, Nelson, Greenwood, and Wilhelm (5), Boissevain (6), Dean (7), Sebrell, Dean, Elvove, and Breaux (8) and Boruff and Abbott (9). Smith, Lantz, and Smith (1), of the University of Arizona, were the first to show that mottled enamel is clue to fluorides in the drinking water; in fact, their analyses of waters from endemic areas show that …

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The Effects Of Fluorides On The Teeth, C. A. Kempf, V. E. Nelson Jan 1936

The Effects Of Fluorides On The Teeth, C. A. Kempf, V. E. Nelson

Proceedings of the Iowa Academy of Science

Mention was made, in the previous paper, of the fact that mottled enamel of the teeth results from the presence of fluorine in the water supply. The water of the city of Ankeny and surrounding territory may have a fluorine concentration to exceed eight or ten parts per million of water; mottled enamel is very prevalent in that area. Work by Smith (1) of the University of Arizona indicates that mottled enamel may result when the concentration of fluorine is as low as 0.8 to 0.9 part per million of water. The work of Schulz and Lamb (2) and McCollum, …

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The Reaction Of Dialkylmagnesium With Monochloroamine, George H. Coleman, Richard F. Blomquist Jan 1936

The Reaction Of Dialkylmagnesium With Monochloroamine, George H. Coleman, Richard F. Blomquist

Proceedings of the Iowa Academy of Science

The yields of primary amines from monochloroamine and Grignard reagents prepared from alkyl halides vary greatly with the halogen present in the reagent. For example the yields from n-butyl reagents decrease from an average of 60 per cent with the chloride to about 15 per cent or less with the iodide. The percentage of dialkylmagnesium present in the three n-butyl reagents is about the same being above 65 per cent in each. With di-nbutylmagnesium however prepared from each of the three n-butyl Grignard reagents by the dioxane method the yields of n-butylamine are above 80 per cent.

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Orientation Studies In The Dibenzofuran Series, A. L. Jacoby, D. M. Hayes, P.R. Van Ess Jan 1936

Orientation Studies In The Dibenzofuran Series, A. L. Jacoby, D. M. Hayes, P.R. Van Ess

Proceedings of the Iowa Academy of Science

2-Hydroxydibenzofuran on bromination gives 1-bromo-2-hydroxydibenzofuran (m.p., 123.5°) and 2-hydroxy-3-bromo-dibenzofuran (m. p., 143-144°). The corresponding products but in a different ratio are obtained by the bromination of 2-methoxydibenzofuran. The allyl ether of 2-hydroxydibenzofuran rearranges to 1-allyl-2-hydroxydihenzofuran (m.p., 82.5°-83°), the methyl ether of which melts at 68°. Also, 2-hydrozydibenzofuran and benzenediazonium chloride couple to give l-phenylazo-2-hyclroxydibenzofuran. The 3-hydroxydibenzofuran couples to give 2-phenylazo-3- hydroxydibenzofuran (m. p., 166°), the structure of which was established by conversion to 2-bromo-3-hydroxydibenzofuran (m.p., 166°), the structure of which was established by conversion to 2-bromo-3-hydroxydibenzofuran (m.p., 115°-116°).

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Mixed Diacyl Derivatives Of O-Aminophenol Containing An Acyl Derived From A Sulfonic Acid, L. Chas. Raiford, J. Reid Shelton Jan 1936

Mixed Diacyl Derivatives Of O-Aminophenol Containing An Acyl Derived From A Sulfonic Acid, L. Chas. Raiford, J. Reid Shelton

Proceedings of the Iowa Academy of Science

In previous work in this Laboratory it was found that, in general, only one mixed diacyl derivative can be obtained from o-aminophenol, regardless of the order of introduction of these acyls, provided both are derived from carboxylic acids. In one case a migration of acyl from nitrogen to oxygen must have occurred. When one of these acyls is derived from a sulfonic acid no rearrangement is observed.

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Pennsylvanian Section At Crescent, Iowa, L. W. Wood Jan 1936

Pennsylvanian Section At Crescent, Iowa, L. W. Wood

Proceedings of the Iowa Academy of Science

The town of Crescent is located in Pottawattamie County, about eight miles north of Council Bluffs. Rock exposures at the foot of the bluffs bordering the valley of Missouri River southwest of Crescent have long been known to geologists, and are mentioned and described in detail by Udden.

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Iowa Devonian Ammonoids, A. K. Miller Jan 1936

Iowa Devonian Ammonoids, A. K. Miller

Proceedings of the Iowa Academy of Science

Goniatites are rare in the Devonian strata of Iowa, but a few have been found in the Independence, the Cedar Valley, and the Lime Creek formations. In view of the superiority of ammonoids for purposes of detailed correlation, and because of the uncertainty that exists in regard to the exact age of some of the Devonian beds of Iowa, it seemed to me that a summary of our present knowledge of Iowa Devonian ammonoids should be compiled and made readily available. It is hoped that this summary will help, either directly or indirectly, with some of the stratigraphic problems that …

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Geology And The Science Of Teaching, John E. Smith Jan 1936

Geology And The Science Of Teaching, John E. Smith

Proceedings of the Iowa Academy of Science

We have been much more concerned about what we shall teach than about how we shall teach it. To beginners, this subject should objectively and inductively as far as possible, also with much illustrative material, field and laboratory work. The principles of the science of teaching should be carefully observed and the major relationships in the subject should be kept constantly before the learner.

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A Certain Persistence Of The Characteristics Of Structure Carried Over From Solid To Liquid With Alkali Halides, G. W. Stewart Jan 1936

A Certain Persistence Of The Characteristics Of Structure Carried Over From Solid To Liquid With Alkali Halides, G. W. Stewart

Proceedings of the Iowa Academy of Science

Through density consideration it is shown that the alkali halides go over into a liquid form which is not random close packing, and evidently differs with body centered cesium halides. There is also a suggestion of a carry-over in aqueous solutions, this taking the form of "super arrangement" of ions in the electrolyte.

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X-Ray Scattering From A Linear Charge Distribution, G. W. Stewart Jan 1936

X-Ray Scattering From A Linear Charge Distribution, G. W. Stewart

Proceedings of the Iowa Academy of Science

In n-alcohols and n-paraffins the molecules lie parallel with such a configuration and distribution of scattering centers that one desires to know the character of x-ray scattering from a linear charge wherein there is a break in the continuity. The computation shows that a certain broken line charge will give a distribution of x-ray somewhat similar to that of two charges separated, not by the distance between their centers of charge but approximately 50 per cent more than this distance.

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The Liquid Structure Of N-Aliphatic Alcohols, G. W. Stewart Jan 1936

The Liquid Structure Of N-Aliphatic Alcohols, G. W. Stewart

Proceedings of the Iowa Academy of Science

There is substantial agreement that the molecules of n-aliphatic alcohols lie generally parallel, with the alternate ends of a longitudinal series of molecules being a pair of polar ends and a pair of non-polar ends. The suggestion has been made that there is no transverse space relationship of the polar pairs. The reasons for and against this suggestion are stated and it is concluded that there is high probability that their polar groups in n-alcohols do have a three dimensional space relationship in the liquid state.

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X-Ray Extinction In Piezoelectrically Oscillating Quartz, J. R. Frederick, G. W. Fox Jan 1936

X-Ray Extinction In Piezoelectrically Oscillating Quartz, J. R. Frederick, G. W. Fox

Proceedings of the Iowa Academy of Science

Fox and Fraser1 have investigated the extinction of x-rays in piezoelectric quartz crystals by photographic methods for both the oscillating and non-oscillating cases. Apparent increased blackening of the photographic plate was observed for both the diffracted and central x-ray beams. Jauncey and Deming 2 have performed a similar experiment on extinction using an ionization chamber and electrometer and have obtained results which are in disagreement with those of Fox and Fraser in regard to the central beam. We are repeating these observations using an ionization chamber and an electrometer tube to check the results of either of the above …

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Some Observations On Teaching Bright Students, C. J. Lapp Jan 1936

Some Observations On Teaching Bright Students, C. J. Lapp

Proceedings of the Iowa Academy of Science

During the summer of 1935 bright students who were finalists in the Iowa Academic Meet in Iowa high school physics were given college physics throughout the first six weeks of the summer session. These bright boys were under intensive observation during this period. Many unusual reactions were observed.

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An Opportunistic Laboratory, John A. Eldridge Jan 1936

An Opportunistic Laboratory, John A. Eldridge

Proceedings of the Iowa Academy of Science

A laboratory has a joint function (a) to create happy attitudes and (b) to teach subject matter practically and realistically. It has sometimes been questioned whether the laboratory does act effectively either as inspiration or as a teaching device. The paper describes experiences in a laboratory where the experiments were exactly correlated with the class work, where laboratory manual was dispensed with, where the experiments were usually unconventional.

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Semantic Psychology, O. M. Norlie Jan 1936

Semantic Psychology, O. M. Norlie

Proceedings of the Iowa Academy of Science

Semantic psychology is the psychology of language. This paper will call attention to the need of a more psychological alphabet.

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A New Technique In The Treatment Of Electrodermal Response Data Resulting From Continuous Affective Stimulation, D. Ulrich Greenwald Jan 1936

A New Technique In The Treatment Of Electrodermal Response Data Resulting From Continuous Affective Stimulation, D. Ulrich Greenwald

Proceedings of the Iowa Academy of Science

I wish to discuss, first, a technique which we have evolved for classifying individual records of electrodermal response to a continuous affective stimulus situation and, second, the individual differences we found in terms of this technique.

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