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Parasitology In The High School Curriculum, Elery R. Becker
Parasitology In The High School Curriculum, Elery R. Becker
Proceedings of the Iowa Academy of Science
In his retiring address to the American Society of Parasitologists, Dr. F. C. Bishop (1938) made the following plea: "I believe there is need for a textbook on parasitology suitable for grade and high school students, and that this society might well take the initiative in getting included in the curriculum of every high school in this country an elementary course in a subject which touches, often in a vital way, the life of every individual." Shall the schoolmen oi Iowa take his plea seriously? Residents of the temperate zone are inclined to refer matters of parasitological interest to mankind …
An Experiment In The Teaching Of Industrial Physics, M. E. Graber
An Experiment In The Teaching Of Industrial Physics, M. E. Graber
Proceedings of the Iowa Academy of Science
While we as teachers of engineering physics comparing ourselves with ourselves and grading objective tests of many types and stripes are inclined to think that our teaching and student product are satisfactory, there may be criteria which our instruction is not meeting. Impressed with this possibility I have made an analysis of my findings obtained from interviews with my own students, deans of engineering schools and engineers in the practice of their profession. The results of these studies are definite and specific.
In Memoriam: Charles L. Robbins; Percy Edgar Brown; Richard Philip Baker; Erwin Oliver Finkenbinder; Charlotte M. King, B. J. Firkins
In Memoriam: Charles L. Robbins; Percy Edgar Brown; Richard Philip Baker; Erwin Oliver Finkenbinder; Charlotte M. King, B. J. Firkins
Proceedings of the Iowa Academy of Science
No abstract provided.
Wet Thermojunctions For Measuring Relative Humidity, L. A. Richards
Wet Thermojunctions For Measuring Relative Humidity, L. A. Richards
Proceedings of the Iowa Academy of Science
Using wet and dry thermojunctions instead of wet and dry thermometers for measuring relative humidity is a rather obvious variation in experimental procedure. A. V. Hill (4) used thermopiles of fifty junctions for this kind of measurement but his sensitive elements were slow in response because of large thermal capacity and large thermal conduction between junctions. Lanning (2) and later Woodrow (3) successfully used single copper-constantan thermocouples for measuring relative humidity in restricted space. Bal des (1) and McCracken (7) have used thermocouples for measuring osmotic pressure by wetting one junction with the solution to be tested and placing the …
The Alumnus, V21n3, July 1937, Iowa State Teachers College
The Alumnus, V21n3, July 1937, Iowa State Teachers College
The Alumnus
Inside This Issue:
-- "Keep Curious," Dr. Jessup Advises Graduates
-- Campus Parade
-- Summer Scoops - On Fall Sports
-- Nearly Three Hundred Attend Reunion Dinner
-- Homecomers To See Greatly Improved Campus
-- T.C. Trackmen Tie Coe For First In Triangular
-- Panthers Win Five Straight To Close Season
-- Alumni News
-- Marriages
-- Births
-- Deaths
-- Alumni Calendar of Events
Iowa State Teachers College Program Of Recitations, Fall/Winter/Spring 1936-37, Iowa State Teachers College
Iowa State Teachers College Program Of Recitations, Fall/Winter/Spring 1936-37, 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 First Record Of The Black Widow Spider (Lactrodectus Mactans Texanus) For Iowa, Karl A. Stiles
The First Record Of The Black Widow Spider (Lactrodectus Mactans Texanus) For Iowa, Karl A. Stiles
Proceedings of the Iowa Academy of Science
There is great interest at the present time in the most poisonous of spiders, the black widow. This interest has been stimulated by the belief on the part of some biologists that its geographical range, which heretofore has been considered southern is being greatly extended. Scientific journals have been reporting the appearance of the black widow in states where it has not previously been found until on January 22, in Science, the statement was made that Minnesota and Iowa were the only states in which it had not been found. The writer believes that Iowa may be added to the …
Grasshoppers In Iowa In 1936, Carl J. Drake, George C. Decker
Grasshoppers In Iowa In 1936, Carl J. Drake, George C. Decker
Proceedings of the Iowa Academy of Science
Iowa and other mid-western states suffered tremendous grasshopper losses in 1936. Although the heaviest damage occurred in the western and southern counties, the infestation extended across the southern half of the state and up along the Mississippi River into a number of northeastern counties. In fact, more or less damage occurred in all save about 25 counties located in the northcentral part of the state. Over 21,000 farmers broadcast 200 or more pounds of poison bait on their respective farms, and a total of 4,463 tons of dry bait materials were wet and mixed at 52 county mixing stations.
Effect Of Auditory And Visual Stimuli On Brain Potential Rhythms, Betty M. Martinson
Effect Of Auditory And Visual Stimuli On Brain Potential Rhythms, Betty M. Martinson
Proceedings of the Iowa Academy of Science
This study attempts to compare the blocking of the Berger rhythm caused by visual and auditory sensations. Four stimuli were used - a bright light of one hundred (100) watts, a dim light of twenty-five (25) watts, a thousand cycle tone at approximately seventy (70) decibels, and a similar tone at approximately forty (40) decibels. A series of two hundred stimuli composed of fifty of each of these arranged in random order was presented to the subject. The records were read for latency and perseveration of the blocking and the four types of stimulus were compared.
The Effect Of Training In Phonics Upon Reading Ability At The College Level, Maurine Rogers
The Effect Of Training In Phonics Upon Reading Ability At The College Level, Maurine Rogers
Proceedings of the Iowa Academy of Science
The purpose of this experiment was to ascertain the effect of phonic ability upon reading ability at the college level. The subjects were 72 poor readers from the lowest 20 per cent of reading scores of University of Iowa freshmen. Half of these readers formed an experimental group and a like half a control group. Vocabulary tests and pronunciation tests composed of the same words were given. These were accompanied by paragraph comprehension and oral reading tests. The experimental group then took a period of individual phonic training at the end of which both experimental and control groups were retested. …
In Memoriam: Ernest Otto Dieterich; Julia Trueman Colpitts; Lucy M. Cavanagh; Harry Mccormick Kelly; James Newton Pearce; Albert B. Reagan; Bohumil Shimek, K. J. Miller, Edward S. Allen, Clark D. Paris, Robert B. Wylie, L. Chas. Raiford
In Memoriam: Ernest Otto Dieterich; Julia Trueman Colpitts; Lucy M. Cavanagh; Harry Mccormick Kelly; James Newton Pearce; Albert B. Reagan; Bohumil Shimek, K. J. Miller, Edward S. Allen, Clark D. Paris, Robert B. Wylie, L. Chas. Raiford
Proceedings of the Iowa Academy of Science
No abstract provided.
Quantitative Measurement Of Some Psychological And Phonetic Factors Affecting The Incidence Of Stuttering, Spencer F. Brown
Quantitative Measurement Of Some Psychological And Phonetic Factors Affecting The Incidence Of Stuttering, Spencer F. Brown
Proceedings of the Iowa Academy of Science
A study reported in the Quarterly Journal of Speech (November, 1935) showed the existence of a phonetic factor of difficulty affecting the occurrence of stuttering spasms. Further analysis of the data on which the previous work was based has revealed a grammatical factor of difficulty. This is more consistent, but does not seem to be as important as the phonetic factor.
Iowa State Teachers College Program Of Recitations, Fall/Winter/Spring 1935-36, Iowa State Teachers College
Iowa State Teachers College Program Of Recitations, Fall/Winter/Spring 1935-36, 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 Alumnus, V20n1, January 1936, Iowa State Teachers College
The Alumnus, V20n1, January 1936, Iowa State Teachers College
The Alumnus
Inside This Issue:
-- No Fall Graduation But Here's a Story On It
-- The Campus Parade -
-- Homecomers Acclaim Report of Progress
-- Chicago Alumni Meet for Dinner, Business
-- Schools, Colleges Like Teachers College Alumni
-- Panther Stalks Afield, Eyes North Central Scalps
-- Purple Panthers Close Season in Burst of Speed
-- Alumni News
-- Marriages
-- Births
-- Deaths
-- And Again We're "Full Up" and Running Over with Good News for Alumni
1936 Old Gold, Iowa State Teachers College
1936 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.
The Liquid Structure Of The N-Paraffins, A. B. Carr
The Liquid Structure Of The N-Paraffins, A. B. Carr
Proceedings of the Iowa Academy of Science
The object of this investigation is to determine whether or not Pierce's density computations compare the more favorably with the hexagonal or the square array.
The Effect Of Carbon Dioxide On Nitrate Accumulation In Carrington Loam, F. B. Smith, P. E. Brown, H. C. Millar
The Effect Of Carbon Dioxide On Nitrate Accumulation In Carrington Loam, F. B. Smith, P. E. Brown, H. C. Millar
Proceedings of the Iowa Academy of Science
Most microorganisms obtain carbon as well as energy from the oxidation of organic compounds but the nitrifying bacteria assimilate carbon dioxide from the air as a source of carbon. The sulfur bacteria and the hydrogen oxidizing bacteria also assimilate carbon dioxide from the air. Other bacteria that cannot assimilate carbon dioxide from the air are greatly stimulated by its presence. Increasing the concentration of carbon dioxide in the air about cultures of Lactobacillus acidophilus produces higher plate counts and larger colonies than cultures in carbon dioxide-free air. An increased concentration of carbon dioxide in the soil air stimulates the growth …
The Rossi-Cholodny Technic As An Aid In The Study Of The Decomposition Of Lignin, H. H. Mollenhoff, F. B. Smith, P. E. Brown
The Rossi-Cholodny Technic As An Aid In The Study Of The Decomposition Of Lignin, H. H. Mollenhoff, F. B. Smith, P. E. Brown
Proceedings of the Iowa Academy of Science
The study of the soil microflora by direct microscopic examination offers the possibility of observing the activities of the microorganisms in their natural surroundings and the attention of soil microbiologists has been directed along this line from time to time. Rossi (4) and Cholodny (1) working independently proposed similar methods which yield results of a qualitative nature and their methods have come to be known as the Rossi-Cholodny technic. Recently, Conn (2 and 3), Winogradsky (6), and Ziemiecka (7) have contributed to the further development of the method, adapting it to laboratory conditions.
In Memoriam: Charles Sherman Cobb; Elbert William Rockwood; Franklin Scott Wilkins; Alonzo A. Miller; James H. Lees, T. C. Stephens, J. N. Pearce, H. D. Hughes, W. A. Hauber, E. J. Cable
In Memoriam: Charles Sherman Cobb; Elbert William Rockwood; Franklin Scott Wilkins; Alonzo A. Miller; James H. Lees, T. C. Stephens, J. N. Pearce, H. D. Hughes, W. A. Hauber, E. J. Cable
Proceedings of the Iowa Academy of Science
No abstract provided.
A Method For Determining The Exchange Capacity Of Organic Matter In The Presence Of Nitrogen And Calcium, H. C. Millar, F. B. Smith, P. E. Brown
A Method For Determining The Exchange Capacity Of Organic Matter In The Presence Of Nitrogen And Calcium, H. C. Millar, F. B. Smith, P. E. Brown
Proceedings of the Iowa Academy of Science
Many methods have been used for determining the base exchange capacity of soils and certain advantages have been claimed by each investigator for his particular method. Fewer studies on the base exchange reactions of organic matter have been made and the nature of the material makes many of the methods used for soils impracticable and inaccurate when applied to organic matter. According to McGeorge (1) the monovalent lignin salts are soluble in alcohol and the use of alcohol in base exchange studies on organic matter is of questionable value. The removal of excess soluble salt from the base exchange …
A Fusarium Following Frost-Injury Of Robinia, J. C. Gilman, B. B. Sproat
A Fusarium Following Frost-Injury Of Robinia, J. C. Gilman, B. B. Sproat
Proceedings of the Iowa Academy of Science
In the fall of 1935 a number of specimens of seedlings of Robinia pseudo-acacia L. were submitted to the Department of Botany of Iowa State College for the investigation of a canker which was girdling the sterns of these plants at or about the ground line. On a majority of the specimens examined, the injury consisted of a sunken area approximately two centimeters in length completely surrounding the stem. The wood under these cankers was materially browned and the cambium was dead. Many of these cankers were covered with orange sporodochia of a fungus which microscopic examination proved to be …
An Opportunistic Laboratory, John A. Eldridge
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.
The Alumnus, V19n3, July 1935, Iowa State Teachers College
The Alumnus, V19n3, July 1935, Iowa State Teachers College
The Alumnus
Inside This Issue:
-- Teach From Abundance of Rich Personality
-- Class of 1910 Holds Center of Stage at Reunion
-- Superintendents, Teachers, Honored at Dinner
-- Cable to Head Combined Science Departments
-- Southern Californians Eat Turkey, Honor Author
-- Men to Have Dormitory Opposite Commons
-- Hats Off! The Flag Goes Marching By! Cadets of '96
-- Wiping Noses, Cutting Hair of Young Alaskans - All in Day's Work for Helen Taft, '24
-- Religious Life Program Gains New Impetus
-- Track Team Champions of Two Conferences
-- Reeves Wins Net Title
-- Everett Scott Pitches No-Hit Contest …
Preliminary Investigation Of The Occurrence And Distribution Of Azotobacter On The Soils In Iowa, William P. Martin, R. H. Walker
Preliminary Investigation Of The Occurrence And Distribution Of Azotobacter On The Soils In Iowa, William P. Martin, R. H. Walker
Proceedings of the Iowa Academy of Science
Berthelot in 1888 was the first to suggest that nitrogen may be added to field soils through the activity of microorganisms. In 1901 Beijerinck isolated a non-symbiotic, aerobic, nitrogen-fixing organism which he called Azotobacter chroococcum. Since this time five other species belonging to this genus have been isolated and likewise have been found capable of fixing atmospheric nitrogen.
A Preliminary List Of The Neuroptera Of Iowa, H. E. Jaques
A Preliminary List Of The Neuroptera Of Iowa, H. E. Jaques
Proceedings of the Iowa Academy of Science
The Neuroptera or nerve-winged insects represent one of the smaller orders of the great group of six legged animals. No persistent work has been done on this group, for Iowa. The species herein listed have been gotten through general collecting. The list may doubtless be more than doubled by giving special attention to the order. The list is published as a challenge to Iowa nature lovers to find the other species that are doubtless more or less common within our state.
The Address Of The President: This Changing World, Edward Bartow
The Address Of The President: This Changing World, Edward Bartow
Proceedings of the Iowa Academy of Science
In this address it is my purpose to express some ideas concerning the Changing World of education, science and invention.
A Study Of Individualized Instruction At The College Level, Daniel D. Feder
A Study Of Individualized Instruction At The College Level, Daniel D. Feder
Proceedings of the Iowa Academy of Science
With a philosophy that makes paramount the greatest possible growth for each individual student as the background, the Department of French at the University of Iowa has conceived and put into operation a plan of individualized instruction. This plan, in effect since September, 1933, marks the latest development of a comprehensive experimental program which has had continuous growth during the past ten years.
A Bibliography On The Use Of Photoelectric Cells In Plant Investigations, F. M. Turrell, Louis Waldbauer
A Bibliography On The Use Of Photoelectric Cells In Plant Investigations, F. M. Turrell, Louis Waldbauer
Proceedings of the Iowa Academy of Science
The recent appearance of the "sperrschicht" type of photoelectric cell has made possible the improvement of several old instruments and the development of new ones. These have included colorimeters, nephelometers, titration meters, pH meters, counters, illuminometers, spectrophotometers, reflection meters and area meters. Much of the work has been published since 1931 and is distributed widely in journals in the special fields of botany, chemistry, physics, engineering, medicine, etc. The authors have compiled the following bibliography with the hope of bringing together these recent developments in a form usable to plant physiologists and others interested in colorimetric, turbidimetric and various light …
The Effect Of Sodium Nitrate And Water Applications To Apple Trees Suffering From Drouth On Some Chemical Constituents Of The Fruit, H. H. Plagge
Proceedings of the Iowa Academy of Science
Storage tests on apples indicated that orchard applications of nitrate of soda had an unfavorable influence on storage capacity. As this effect appeared to be greatly restrained by drouth in 1930, experiments were carried on in 1931 to determine specifically the effect of differential treatments of nitrate of soda and water to trees suffering from dry weather.
In Memoriam: Wesley Greene; Clyde E. Ehinger; Joseph Edward Guthrie, A. T. Erwin, Frank C. Pellett
In Memoriam: Wesley Greene; Clyde E. Ehinger; Joseph Edward Guthrie, A. T. Erwin, Frank C. Pellett
Proceedings of the Iowa Academy of Science
No abstract provided.