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Articles 12901 - 12930 of 14071
Full-Text Articles in Entire DC Network
National News Of High School Science Clubs
National News Of High School Science Clubs
Science Bulletin
At the recent meeting of the American Association for the Advancement of Science in New Orleans, Dr. Otis W. Caldwell of Columbia University reported before the Academy Conference on the work of science clubs in different states.
Two Fundamental Equations Of Current Electricity, L. Begeman
Two Fundamental Equations Of Current Electricity, L. Begeman
Science Bulletin
Formulas in physics are mathematical expressions of natural laws or principals well established. The two most important for the ordinary citizen are first the one that gives expression to Ohm's law and second, the one that shows how to calculate the power of a current.
Suggestions For Biology Or Nature Clubs, Ross W. Harris
Suggestions For Biology Or Nature Clubs, Ross W. Harris
Science Bulletin
The very first requirement for a successful club of this nature is enthusiasm for and an interest in the. world of living things. The sparks for kindling enthusiasm must come from off the hearth of the sponsor. While the students must be guided they should be led to feel that it is their program that they are working out and not that of a teacher who grants credit for participation.
Remarkable Remarks: Editorial
Science Bulletin
In a recent book, "The Mysterious Universe," the author, Sir James Jeans, says that "the total number of stars in the universe is probably something like the total number of grains of sand on all the seashores of the world." In another book of his, "The Stars in Their Courses," published about the same time, he repeats the above statement and adds: "or to take another comparison, the total number of stars in the universe is probably about equal to the number of drops of rain which fall on the whole of London in a day of heavy rain."
The Purple Pen, Volume 4, Number 2, February 1932 [Download Entire Issue]
The Purple Pen, Volume 4, Number 2, February 1932 [Download Entire Issue]
Purple Pen
No abstract provided.
"Nearin' Thirty", Robert Allen Mallory
Consider The Sparrow
Science Bulletin
Most of the birds which you and I know best are fair-weather friends. That is to say, they stay with us just so long as the sun is warm and food is plentiful, but when winter comes, they forsake us. Nearly all of our common birds behave thus, which must mean, if birds are anything like humans, that it is our climate and not ourselves that they like.
A Successful Club Project In Biology
A Successful Club Project In Biology
Science Bulletin
A few years ago when the author was teaching biology in a suburban high school of Chicago, the tussock moth became a menace to the shade trees in that vicinity. The biology students took up the problem of the tussock moth and how to eradicate it. The life history and habits of the moth were studied. Collections were made to show the life history. The Commercial Club became interested and a talk on the moth was given by a club member at one of their meetings.
To The Members Of The Junior Academy, Joseph C. Gilman
To The Members Of The Junior Academy, Joseph C. Gilman
Science Bulletin
The purpose of the Iowa Academy of Science is to aid in the advancement of science throughout the state. When the American Association for the Advancement of Science suggested that the state academies sponsor a movement among high school science clubs to organize into statewide units, the Iowa Academy welcomed the opportunity offered by this situation to serve science.
The Use Of Posters In Club Work
The Use Of Posters In Club Work
Science Bulletin
Posters furnish excellent illustrative material for club programs and will add much interest to the work. There are usually members of the club who have artistic ability and can make use of their ability in this way, but it is not necessary to be an artist in order to make good posters or cartoons, as excellent results can be obtained by cutting advertisements from magazines and arranging them and pasting them on cardboard so as to illustrate various subjects. The value of the poster does not depend upon its artistic side but in the clever representation and emphasis of some …
Science Bulletin, Vol.4 No.5, January 1932 [Complete Issue]
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
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
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!
Iowa State Teachers College Program Of Recitations, Winter 1931-1932, Iowa State Teachers College
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.
Editor And Advisory Board
Science Bulletin
A Service Bulletin for Teachers of High School Science.
Officers And Past Presidents, Iowa Academy Of Science
Officers And Past Presidents, Iowa Academy Of Science
Proceedings of the Iowa Academy of Science
No abstract provided.
A Demonstration Of Dielectric Hysteresis In Rubber, W. D. Crozier
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.
The Alumnus, V16n1, January 1932, Iowa State Teachers College
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
Variation Of Acoustic Absorption Caused By Different Surface Treatments Of Insulation Board, H. J. Plagge, Edward Richard Wittemore, L. K. Arnold
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
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 Note On Atmospheric Electricity And The Effect Of Electricity On The Growth Of Plants, L. W. Butler, C. S. Dorchester
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.
Some Observations On Spectral Color Discrimination, Le Roy D. Weld
Some Observations On Spectral Color Discrimination, Le Roy D. Weld
Proceedings of the Iowa Academy of Science
Some years ago the writer encountered a reference to a certain spectral line which was there characterized as "blue," whereas I should without hesitation have called it violet. This suggested the question as to whether the common names of pure colors had ever been defined as to their wave length boundaries, and a surprising lack of agreement on the subject was shortly disclosed. For example, there appear in the literature the following designations of spectral color boundaries, in Angstrom units, incidentally with no indication as to how they were arrived at.
A Preliminary Study Of Pitch Inflection In The Speech Of Preschool Children, Melvin S. Hattwick
A Preliminary Study Of Pitch Inflection In The Speech Of Preschool Children, Melvin S. Hattwick
Proceedings of the Iowa Academy of Science
Individual and group studies of the language development of children have largely centered about the meaningful content including vocabulary, the production of speech sounds, and growth in the use of the sentence. Practically no studies have been made of the expressive side of language development including pitch variation, vocal quality, accent and emphasis, and the temporal organization of the language units.
Proceedings Of The Forty-Sixth Annual Meeting Of The Iowa Academy Of Science, Held At Cedar Falls, April 29 And 30, 1932: Minutes Of The Meeting; Staff & Committee Reports
Proceedings of the Iowa Academy of Science
No abstract provided.
Motility In Newborn Infants, Orvis C. Irwin
Motility In Newborn Infants, Orvis C. Irwin
Proceedings of the Iowa Academy of Science
The motility of 73 newborn infants under 16 days of age has been measured by the stabilimeter-polygraph technique. Some of the more important results are: the demonstration of individual differences in motility soon after birth; the absence of sex differences; the relation of motility to nutritional status, hunger, body temperature, sleep, and various physical measurements and indices such as weight, height, body surface, etc.
Absorption Spectra Characteristic Of Vitamin A In Animal And Vegetable Oils, J. B. Philipson, Jay W. Woodrow
Absorption Spectra Characteristic Of Vitamin A In Animal And Vegetable Oils, J. B. Philipson, Jay W. Woodrow
Proceedings of the Iowa Academy of Science
A continuation of our previous work on the ultra-violet absorption spectra of substances showing vitamin A activity, tends to further substantiate the evidence that the absorption band in the regions 325-330 m.μ., which Morton and Heilbron have shown to be characteristic of vitamin A in animal fats, also characterizes vegetable compounds containing the growth promoting factor.
Motion Of K+ Ions In Mercury Vapor, Carl Frische
Motion Of K+ Ions In Mercury Vapor, Carl Frische
Proceedings of the Iowa Academy of Science
Ionization by positive ion impact was studied in A, Ne, N2 , CO, He, at voltages up to 4000 volts and the results seem to check with those of Sutton (Phys. Rev. 33, 363, 1929) and Beeck (Ann. cl. Phys. 6, 8, 1001, 1930) wherever a check was possible. When the work was extended to an element heavier than K + i.e., Hg. the results are more complicated. The evidence seems to indicate; (a) reflection of K + ions at all voltages, (b) an increase in mean free path with increase in voltage, (c) no ionization below 250 volts, …
Are You Educated?, H. Earl Rath
Are You Educated?, H. Earl Rath
Science Bulletin
A few months ago we tried to set up a sort of standard by which a per- son might judge as to whether or not he could satisfy the demands of ordinary health. It shall be the purpose of this article to set up a standard by which an individual might judge of the adequacy of his or her health knowledge. This discussion is based largely on the "Ten Commandments" by Dr. Livingstone Farr -and, given in an address before the American Public Health Association, and printed in College Text books of Hygiene by Smiley and Gould. Many will probably …