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Articles 12721 - 12750 of 12955
Full-Text Articles in Entire DC Network
Professional Growth, R. W. Getchell
Professional Growth, R. W. Getchell
Science Bulletin
The first class provides bits of scientific information which can be interspersed in class discussions. Such items will add interest to the class work and may indicate new and modern uses for chemical substances and appliances. They are found in such publications as Popular Science Monthly. The second class of articles are indispensable to good teaching.
The Alumni News Letter, V13n2, April 1, 1929, Iowa State Teachers College
The Alumni News Letter, V13n2, April 1, 1929, Iowa State Teachers College
The Alumni News Letter
Contains news of the College and its alumni.
A Spectorophotometric And Spectroscopic Study Of Phi Persei, Herbert F. Schiefer
A Spectorophotometric And Spectroscopic Study Of Phi Persei, Herbert F. Schiefer
Proceedings of the Iowa Academy of Science
The great importance of intensity studies in stellar spectra has long been recognized and as such has been the subject of many investigations. Most of the early studies have been on the intensity distribution of the continuous spectrum. The more recent investigations have been confined to special regions of the continuous spectrum as well as on selected spectral lines. Various methods have been used for such intensity studies.
The Address Of The President - Contributions To The Pleistocene Geology Of Iowa, George F. Kay
The Address Of The President - Contributions To The Pleistocene Geology Of Iowa, George F. Kay
Proceedings of the Iowa Academy of Science
Although for many years much has been spoken and written about the glacial deposits of Pleistocene age in Iowa, in connection with the meetings of this Academy and many other scientific organizations, there is as much interest in these deposits today as at any previous time. Your retiring President has chosen therefore as the subject of this address, "Contributions to the Pleistocene Geology of Iowa." It is my purpose to recall to your minds some of the geologists who have made contributions to the Pleistocene geology of Iowa, and insofar as the time at our disposal will permit to point …
Roster And Records Of Secretary: 1903-1929, Iowa Academy Of Science
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.
The Alumni News Letter, V12n4, October 1, 1928, Iowa State Teachers College
The Alumni News Letter, V12n4, October 1, 1928, Iowa State Teachers College
The Alumni News Letter
Contains news of the College and its alumni.
The Alumni News Letter, V12n2, April 1, 1928, Iowa State Teachers College
The Alumni News Letter, V12n2, April 1, 1928, Iowa State Teachers College
The Alumni News Letter
Contains news of the College and its alumni.
The Alumni News Letter, V12n1, January 1, 1928, Iowa State Teachers College
The Alumni News Letter, V12n1, January 1, 1928, Iowa State Teachers College
The Alumni News Letter
Contains news of the College and its alumni.
Officers, Past Presidents, And Members, Iowa Academy Of Science
Officers, Past Presidents, And Members, Iowa Academy Of Science
Proceedings of the Iowa Academy of Science
No abstract provided.
In Memoriam: J. H. Paarmann; Bruce Fink; Melvin P. Somes; Addie Grace Wardle; Clifford H. Farr, L. H. Pammel, A. O. Thomas, Nicholas Knight, Robert B. Wylie
In Memoriam: J. H. Paarmann; Bruce Fink; Melvin P. Somes; Addie Grace Wardle; Clifford H. Farr, L. H. Pammel, A. O. Thomas, Nicholas Knight, Robert B. Wylie
Proceedings of the Iowa Academy of Science
No abstract provided.
When Cedar Falls Was Young, Roger Leavitt
When Cedar Falls Was Young, Roger Leavitt
Iowa Book Gallery
This booklet recounts historical incidents in the early history of Cedar Falls, Iowa, form 1845 to 1866.
Beauty (Summer Rain), James Hearst
Beauty (Summer Rain), James Hearst
James Hearst Documents
A poem published in the February 26, 1927 issue of The Independent, with edits by the author changing the title from Beauty to Summer rain.
The Alumni News Letter, V11n1, January 1, 1927, Iowa State Teachers College
The Alumni News Letter, V11n1, January 1, 1927, Iowa State Teachers College
The Alumni News Letter
Contains news of the College and its alumni.
Specific Infectious Pyelonephritis Of Cows, C. D. Rice
Specific Infectious Pyelonephritis Of Cows, C. D. Rice
Proceedings of the Iowa Academy of Science
In the last three years, five cases of pyelonephritis in the cow have been attended by the clinic staff. Several cases were reported from Humboldt County. This disease is reported as being quite common in European countries. The writer has had the opportunity to make bacteriological examination in two of the above mentioned cases and one case in the pig.
A Spectrophotometric Method Of Studying Hemoglobin And Other Colored Substances In Solution, George E. Davis
A Spectrophotometric Method Of Studying Hemoglobin And Other Colored Substances In Solution, George E. Davis
Proceedings of the Iowa Academy of Science
An investigation was carried out to determine the possibilities of applying spectrophotometric methods to the problem of estimating the concentration of hemoglobin in blood. The concentration of a substance in solution can easily be determined from its transmission of some particular wave length, providing the absorption ratio for that wave length is known. A late model direct reading spectrophotometer was used. The method was found to be fairly accurate and simple and should prove valuable in other physical investigations involving the study of spectral transmission curves of various colored substances. Some interesting irregularities in the shape of the spectral transmission …
The Use Of Sodium Taurocholate And Crystal Violet In The Isolation Of Bact. Tumefaciens Sm. & Town., M. K. Patel
The Use Of Sodium Taurocholate And Crystal Violet In The Isolation Of Bact. Tumefaciens Sm. & Town., M. K. Patel
Proceedings of the Iowa Academy of Science
In the isolation of Bacterium tumefaciens from overgrowths on apple, one of the greatest sources of contamination is that of soil organisms. These are lodged in the soil within the crevices of the convoluted gall surface. In addition the crown gall organisms frequently occur in only small numbers, making it necessary to use large amounts of tissue for isolation purposes.
Molecular Space Array In X-Ray Diffractioin Halos In A Liquid: The Case Of Liquid Normal Primary Alcohols: The Cybotatic State, G. W. Stewart, Roger M. Morrow
Molecular Space Array In X-Ray Diffractioin Halos In A Liquid: The Case Of Liquid Normal Primary Alcohols: The Cybotatic State, G. W. Stewart, Roger M. Morrow
Proceedings of the Iowa Academy of Science
For more than a decade (Debye and Scherrer, Nachr. Gesell. Göttingen (1916), p. 6) the X-ray circular diffraction halo in liquids has been known. Doubtless numerous times the suggestion has been made (vide Hewlett, Phys. Rev. 20 (1922), p. 688, and others) that there is in the liquid a spacial arrangement of molecules, probably as fragmentary crystals. But definite evidence of such a structure has been lacking.
Notes On The Occurrence Of Oolitic Limestone In The Otis Beds Of The Devonian, Kenwood, Iowa, Glenn S. Dille
Notes On The Occurrence Of Oolitic Limestone In The Otis Beds Of The Devonian, Kenwood, Iowa, Glenn S. Dille
Proceedings of the Iowa Academy of Science
A very prominent outcrop of the Otis limestone occurs along the valley of Indian creek at a point known as Horse Thief Cave, about one-half mile south of the town of Kenwood, Iowa. At this place the exposed beds contain the characteristic Spirifer subumbonus Hall.
Officers, Past Presidents, And Members, Iowa Academy Of Science
Officers, Past Presidents, And Members, Iowa Academy Of Science
Proceedings of the Iowa Academy of Science
No abstract provided.
Proceedings Of The Forty-First Annual Meeting Of The Iowa Academy Of Science, Held At Iowa City, May 6 And 7, 1927: Minutes Of The Meeting; Staff & Committee Reports
Proceedings of the Iowa Academy of Science
No abstract provided.
The History And Distribution Of Yellow Nelumbo, Water Chinquapin, Or American Lotus, Mrs. H. J. Taylor
The History And Distribution Of Yellow Nelumbo, Water Chinquapin, Or American Lotus, Mrs. H. J. Taylor
Proceedings of the Iowa Academy of Science
Much interest has been manifested in recent years in the American lotus, not only because of the economic value but its value for ornamental purpose and its beauty in its native habitat.
The Physiographic Ecology Of A Wisconsin Drift Lake, Lois A. Catlin, Ada Hayden
The Physiographic Ecology Of A Wisconsin Drift Lake, Lois A. Catlin, Ada Hayden
Proceedings of the Iowa Academy of Science
In Iowa, practically all of the swamp land and many of the smaller lakes with which the early pioneers were familiar have been drained and there agricultural crops are grown. Whether the greatest economic benefit may be derived from appropriating for agricultural purposes such a small proportion of the land as lake beds represent, or by conserving and developing their natural resources is a subject for consideration. With one exception (that of Wall Lake in Wright County), Little Wall Lake is the only lake of any size within an area with radius of at least fifty miles, and in view …
Manganese In Iowa City Waters, Edward Bartow, W. T. Bailey
Manganese In Iowa City Waters, Edward Bartow, W. T. Bailey
Proceedings of the Iowa Academy of Science
More than thirty years ago Proskauer reported the presence of manganese in many ground waters. For a long time afterward little attention was paid to the subject because it had not been proved that manganese imparted any bad qualities to water. But in 1906, the sudden appearance of iron and manganese in the Breslau water supply (1) in such quantities as to cause it to be abandoned, forced the recognition of the fact that iron and manganese produce like qualities in water. The first water in this country in which manganese occurred in sufficient quantity to cause trouble was from …
The Dark Ring Nebula In Cygnus, D. W. Morehouse
The Dark Ring Nebula In Cygnus, D. W. Morehouse
Proceedings of the Iowa Academy of Science
Since my report on the Dark Ring Nebula in Cygnus,1 I have received the following communication from Dr. R. H. Curtiss, Acting Director of the Detroit Observatory of the University of Michigan: "Your article in the February Popular Astronomy on a dark ring nebula in Cygnus has led me to look up an excellent slide which we have of that region made from a photograph secured with the 6-inch Willard Lens on October 5, 1893, at Lick Observatory. The dark elliptical ring stands out very beautifully on this slide. I think anyone would notice it but would be strongly …
The Alumni News Letter, V10n4, October 1, 1926, Iowa State Teachers College
The Alumni News Letter, V10n4, October 1, 1926, Iowa State Teachers College
The Alumni News Letter
Contains news of the College and its alumni.
Officers, Past Presidents, And Members, Iowa Academy Of Science
Officers, Past Presidents, And Members, Iowa Academy Of Science
Proceedings of the Iowa Academy of Science
No abstract provided.
Anticlines Of The State Of Iowa, Glenn S. Dille
Anticlines Of The State Of Iowa, Glenn S. Dille
Proceedings of the Iowa Academy of Science
This paper was written because the author has felt the need of a report covering the anticlinal folds of the State of Iowa, together with a record of the drilling which has been done.
Removal Of A Common Source Of Trouble In Hydrogen Ion Measurements, Stephen Popoff, A. H. Kunz
Removal Of A Common Source Of Trouble In Hydrogen Ion Measurements, Stephen Popoff, A. H. Kunz
Proceedings of the Iowa Academy of Science
The best conditions for plating platinum black deposits are given. If these conditions are followed, it is rather difficult to "poison" the hydrogen electrodes in the ordinary neutralization reactions. Poisoned electrodes can be restored to give normal values if treated with concentrated nitric acid.
Some Investigation Of The Ethanol Carbontetrachloride System, S. Fred Calhoun, Thos. C. Poulter
Some Investigation Of The Ethanol Carbontetrachloride System, S. Fred Calhoun, Thos. C. Poulter
Proceedings of the Iowa Academy of Science
The Ethanol Carbontetrachloride system has been investigated with respect to the total vapor pressure, and the partial vapor pressures of the constituents at twenty-five and sixty degrees. The total pressures of different mixtures of Ethanol Carbontetrachloride were determined at twenty-five degrees by means of a bulb to which was sealed a manometer. The total pressure at sixty degrees was measured by means of an apparatus designed by the authors for the rapid and accurate determination of the vapor pressures of liquids that do not readily react with mercury. A description of this apparatus will appear in the Journal of Industrial …
Fifty Years At The Teachers College, David Sands Wright
Fifty Years At The Teachers College, David Sands Wright
Iowa Book Gallery
A history of the Iowa State Teachers College, later known as the University of Northern Iowa.