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Electromotive Forces And Electrode Potentials In Pyride And Its Binary Mixtures With Water, Methyl Alcohol And Ethyl Alcohol, F. S. Moretimer, J. N. Pearce
Electromotive Forces And Electrode Potentials In Pyride And Its Binary Mixtures With Water, Methyl Alcohol And Ethyl Alcohol, F. S. Moretimer, J. N. Pearce
Proceedings of the Iowa Academy of Science
The systematic study of the electromotive forces in non-aqueous solvents was begun by Jones. By using cells of the type: Ag-AgNO3aq , — AgNO3non-aq. -Ag with the same concentration of the salt in each solvent, he hoped to be able to calculate the degree of dissociation in the nonaqueous solutions. It soon became apparent, however, that the solution pressure of a metal varies from solvent to solvent. Substituting the values found by Völlmer for the degree of dissociation of silver nitrate in ethyl alcohol, he calculated the ratio of the solution pressure of silver in alcohol …
An Old Roman Coin In Dakota, David H. Boot
An Old Roman Coin In Dakota, David H. Boot
Proceedings of the Iowa Academy of Science
In 1910 the writer was at work in Lincoln County, South Dakota, and had his attention called one morning to a curious piece of metal that had just been dug up by one of his neighbors. The find was apparently an old coin, but no one in that region could identify it. It was sent to the Smithsonian Institution and there identified as a coin of Septimius Severus, Emperor of Rome, A. D. 193 to 211. Some account of this Roman Emperor will be of interest in this connection.
The Pleistocene Of Capitol Hill, James H. Lees
The Pleistocene Of Capitol Hill, James H. Lees
Proceedings of the Iowa Academy of Science
The Pleistocene exposures on Capitol Hill at Des Moines have become classic through the studies made by McGee and Call which demonstrated the presence of glacial drift overlying loess. The results of these studies were published in the American Journal of Science, Volume 24, 1882, pp. 202-223.
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.
The Lithogenesis Of The Sediments, Francis M. Van Tuyl
The Lithogenesis Of The Sediments, Francis M. Van Tuyl
Proceedings of the Iowa Academy of Science
There are few lines of investigation in geology which promise more fruitful returns than the lithogenesis of the sediments. The sedimentary rocks have from the first been sadly neglected although the igneous and metamorphic groups have been systematically and more or less intensively studied both in the field and in the laboratory. Even the megascopic characters of the sediments have for the most part been indefinitely and vaguely described and petrographic examinations have until recently rarely been made. Descriptive terms have been indiscriminately used and such important features as mud cracks and many others equally as significant have in many …
A Seed Key To Some Common Weeds And Plants, E. L. Palmer
A Seed Key To Some Common Weeds And Plants, E. L. Palmer
Proceedings of the Iowa Academy of Science
The aim of this thesis is three-fold. Primarily, it is written to furnish a method of determining accurately the names of various seeds and seed-like fruits with the express purpose of detecting adulterants in commercial seeds. The key should also aid in determining plants in the fruiting condition when the flower parts are too far advanced for identification by the ordinary method. Further, it should serve as a check to determinations from a study of the flowers.
A Forest Census In Lyon County, Iowa, David H. Boot
A Forest Census In Lyon County, Iowa, David H. Boot
Proceedings of the Iowa Academy of Science
The northwest corner of Iowa has comparatively few native trees because of the xerophytic conditions which prevail there. The rainfall of this part of the state is the least in Iowa, at times going as low as eighteen inches for the year, and in exposed regions, the forest trees have been unable to obtain a footing. The native trees are nearly all found along the streams or in protected valleys. A good illustration of this is in Centennial Township in the southwestern corner of Lyon County, where the Big Sioux River flows in a westerly direction for several miles at …
1916 Courant, Iowa State Teachers College High School
1916 Courant, Iowa State Teachers College High School
Malcolm Price Laboratory School Yearbooks
The student yearbook of the Teachers College High School (later the Northern University High School, part of the Malcolm Price Laboratory School of the University of Northern Iowa).
Proceedings Of The Thirty-First Annual Session (Of The Iowa Academy Of Science), Held In Des Moines, April 28 And 29, 1916: Minutes Of The Meeting; Staff & Committee Reports
Proceedings of the Iowa Academy of Science
No abstract provided.
An Improved Method Of Determining Solubility, W. S. Hendrixson
An Improved Method Of Determining Solubility, W. S. Hendrixson
Proceedings of the Iowa Academy of Science
In the continuation of work on acid sodium and acid potassium phthalates as standards in acidimetry and alkalimetry, it seemed desirable to study among other properties, the solubility of these salts.
Some Auxoamylases, Elbert W. Rockwood
Some Auxoamylases, Elbert W. Rockwood
Proceedings of the Iowa Academy of Science
The amylases, or starch splitting enzymes, are aided, or have their activity increased, by certain nitrogenous compounds particularly those which contain the NH2 group. These amylolytic stimulating substances I have called auxoamylases. All amino compounds are not auxo substances, however. The experiments described here have been made to ascertain what compounds do activate the amylases and the conditions which affect their action.
A Note Regarding The Present Status Of The Iowan Drift Problem, George F. Kay
A Note Regarding The Present Status Of The Iowan Drift Problem, George F. Kay
Proceedings of the Iowa Academy of Science
Among the many persons who, by their publications, have made known to the world the Pleistocene history of Iowa, no one has had a greater part than Doctor Calvin, who spent his life endeavoring to interpret the geological phenomena of the slate. For many years, but chiefly from about 1895 until his death in 1911, important papers were written by him in the reports of the Iowa Geological Survey, of which he was Director, and in other channels of publication. None of these publications are of greater interest than those which describe the characteristics, relationships, and age of the Iowan …
Contributions To The Geology Of Southwestern Iowa, Geo. L. Smith
Contributions To The Geology Of Southwestern Iowa, Geo. L. Smith
Proceedings of the Iowa Academy of Science
During the last year work on the geology of southwestern Iowa has been continued. The different outcrops in the vicinity of Stennett in Montgomery County have been visited, and important information obtained of the stratigraphy and paleonology of the Stennett limestones and the Braddyville and Platte shales. In Fremont County the exposures at Hamburg, McKissicks Grove, Mill Creek, as well as those from Opossum Creek north to Thurman have again been examined, in hopes to definitely locate the break that takes place in the strata between Thurman and the Wilson section.
Controlling Fault Systems In Iowa, Charles Keyes
Controlling Fault Systems In Iowa, Charles Keyes
Proceedings of the Iowa Academy of Science
With its even plains surface, the infrequency of bed-rock exposures, and the universal presence of thick till or loess mantles, detailed geologic mapping of the prairie states is attended by many inherent difficulties not met with in more broken country. In consequence of the existence of these unusual conditions the consideration of possible noteworthy geotectonic features in the region is largely neglected. Anything beyond a few of the most obvious local characters completely fail of record. Over a very large part of the Mississippi basin the tectonics are commonly treated as if there were none at all. It seems to …
An Outlier Of The So-Called Clinton Formation In Dubuque County, Iowa, Jesse V. Howell
An Outlier Of The So-Called Clinton Formation In Dubuque County, Iowa, Jesse V. Howell
Proceedings of the Iowa Academy of Science
During the summer of 1914 a considerable amount of grading was done at the forks of the road on the west side of Lora Hill, seven miles west of Dubuque. As a result of this work there was exposed along the road a band of peculiar reddish clay from one to two feet in thickness, underlain by the characteristic gray-green, plastic clay-shales of the Upper Maquoketa formation. The red clay is much less plastic than the underlying green shales, but is remarkable chiefly for the fact that it is composed largely of iron oxide and contains great numbers of small, …
A Correlation Of The Peneplains Of The Driftless Area, Urban B. Hughes
A Correlation Of The Peneplains Of The Driftless Area, Urban B. Hughes
Proceedings of the Iowa Academy of Science
The conclusions reached in this paper in regard to the erosional history of the Driftless Area are the results of evidence secured from three sources: (1) Field work during the summer of 1915, carried on by the writer in the Baraboo district and the Richland Center quadrangle, Wisconsin, has furnished direct evidence for the northern portion of the area under consideration. (2) The literature on the subject has been used freely, the Lancaster-Mineral Point folio by Grant and Burchard having proven especially valuable. (3) The details of the Elizabeth and Galena quadrangles were furnished by Prof. A. C. Trowbridge under …
Superimposition Of Kansan Drift On Subaftonian Drift In Eastern Iowa, Morris M. Leighton
Superimposition Of Kansan Drift On Subaftonian Drift In Eastern Iowa, Morris M. Leighton
Proceedings of the Iowa Academy of Science
Many new exposures have been made by the Chicago, Milwaukee and St. Paul Railway in the reconstruction of their line across Iowa, Various ones of these have proved to be of especial interest to Pleistocene geologists, and among them are several cuts in the northern part of Clinton County, showing superimposition of the two oldest drifts, the Kansan drift on the Sub- Aftonian drift. This paper is devoted to a description of these and their interpretation.
A Note On Fulgurites From Sparta, Wisconsin, W. D. Shipton
A Note On Fulgurites From Sparta, Wisconsin, W. D. Shipton
Proceedings of the Iowa Academy of Science
During the summer of 1915 some fulgurites were found near Sparta, Wisconsin, in a small sand knoll composed of residual quartz grains of the Potsdam formation, which is Upper Cambrian in age. The sand is fairly clean and of uniform character and is being reworked continually by the wind since there is only a scant covering of vegetation.
Bibliography Of The Loess, E. J. Cable
Bibliography Of The Loess, E. J. Cable
Proceedings of the Iowa Academy of Science
A bibliography of the loess area of Iowa.
The Western Interior Geosyncline And Its Bearing On The Origin And Distribution Of The Coal Measures, Francis M. Van Tuyl
The Western Interior Geosyncline And Its Bearing On The Origin And Distribution Of The Coal Measures, Francis M. Van Tuyl
Proceedings of the Iowa Academy of Science
Late studies of the Mississippian formations of southeastern Iowa for the Iowa Geological Survey have shown that these formations were tilted to the southwestward and partly truncated in late Mississippian time. There is convincing evidence that this tilting was related to deformation over a wide area in southern Iowa, southeastern Nebraska, eastern Kansas and north western Missouri which outlined a southwestwardly pitching geosyncline in which the Coal Measures of the Western Interior coal field were deposited. This geosyncline was shallow in early Pennsylvanian time and probably did not greatly exceed 700 feet in depth at the close of the Cherokee …
A Highly Alate Specimen Of Atrypa Reticularis (Linn.), A. O. Thomas
A Highly Alate Specimen Of Atrypa Reticularis (Linn.), A. O. Thomas
Proceedings of the Iowa Academy of Science
The most abundant fossil in the upper part of the Wapsipinicon beds at Independence and elsewhere in east central Iowa is a fine-ribbed representative of Atrypa reticularis (Linn.). This species is found in every fossiliferous horizon in the Devonian or the state. Indeed, it is worldwide in its distribution and is the "longest lived of all known organisms," ranging from early Silurian through the Devonian into the early Mississippian.
On The Variation In The Reflecting Power Of Isolated Crystals Of Selenium And Of Tellurium With A Variation In The Azimuth Of The Incident Plane Polarized Light, L. P. Sieg
Proceedings of the Iowa Academy of Science
The reflecting power of a surface is defined as the ratio of the intensity of the light reflected at perpendicular incidence to the intensity of the incident light. There are two ways of determining the reflecting power of a metallic surface. One is by a direct, or photometric (dioptric) method. The other is by an indirect (katoptric) method.
The Tungsten X-Ray Spectrum, Elmer Dershem
The Tungsten X-Ray Spectrum, Elmer Dershem
Proceedings of the Iowa Academy of Science
Some work has recently been done in this laboratory in the analysis of the molecular arrangement in certain crystals by means of the reflection of X-rays from these crystals. To carry out this work it was first necessary to determine the wave lengths of the characteristic lines of the tungsten X-ray spectrum because tungsten is the material of the anticathode of the Coolidge X-ray tube, the most satisfactory tube for this kind of work.
The Stroboscopic Effect By Direct Reflection Of Light From Vibrating Mirrors., L. E. Dodd
The Stroboscopic Effect By Direct Reflection Of Light From Vibrating Mirrors., L. E. Dodd
Proceedings of the Iowa Academy of Science
A very simple and convenient method of producing the stroboscopic effect is to reflect light directly from a vibrating mirror upon a stroboscopic screen. The mirror may be such as is afforded by a vibrating membrane which is itself reflecting or has a suitable mirror attached either directly or indirectly to it.
Why Hot Water Pipes In Household Plumbing Burst More Frequently Than Cold Water Pipes, F. C. Brown, Waldemar Noll
Why Hot Water Pipes In Household Plumbing Burst More Frequently Than Cold Water Pipes, F. C. Brown, Waldemar Noll
Proceedings of the Iowa Academy of Science
Plumbers often notice that the hot water pipes in a plumbing system that lead to the bathroom or kitchen burst more frequently than the pipes carrying cold water. It is said that the ratio is at least four to one. The "Cold Water" usually freezes so as to lessen the flow of water in the pipes, or to stop the flow altogether, but the freezing seldom bursts the pipes unless the temperature is very low.
Bibliography Of Literature Bearing On The Light-Sensitiveness Of Selenium, F. C. Brown
Bibliography Of Literature Bearing On The Light-Sensitiveness Of Selenium, F. C. Brown
Proceedings of the Iowa Academy of Science
A bibliography of literature bearing on the light-sensitiveness of selenium.
A Sheeps Brain Without A Corpus Callosum, H. A. Scullen
A Sheeps Brain Without A Corpus Callosum, H. A. Scullen
Proceedings of the Iowa Academy of Science
The brain in question was one from a shipment of dissecting material purchased from the Western Biological Supply Company of Omaha, Nebraska.
An Hermaphroditic Crayfish Of The Species Cambarus (Faxonius) Obscurus Hagen, I. L. Ressler
An Hermaphroditic Crayfish Of The Species Cambarus (Faxonius) Obscurus Hagen, I. L. Ressler
Proceedings of the Iowa Academy of Science
Recently, in the course of my work in the laboratory, an abnormally developed crayfish was brought to my attention. This animal had present both male and female characters. The length of this apparent hermaphrodite is 77mm. somewhat smaller than the average for this group.
Successful "Mink Farming" In Iowa, B. H. Bailey
Successful "Mink Farming" In Iowa, B. H. Bailey
Proceedings of the Iowa Academy of Science
Through the kindness of Prof. C. C. Nutting, Senator Lambert and his brother, Mr. C. Lambert, of Sabula, Iowa, the writer was afforded an opportunity to visit and study the "mink farm" owned by Mr. C. Lambert and J. E. Densmore, of Sabula, Iowa.
Additional Notes On The Little Spotted Skunk, Spilogale Interrupta Raf., B. H. Bailey
Additional Notes On The Little Spotted Skunk, Spilogale Interrupta Raf., B. H. Bailey
Proceedings of the Iowa Academy of Science
In volume XXII of the Proceedings of the Iowa Academy of Science, it was shown that the Little Spotted Skunk is state wide in its distribution. Since writing the last article, I have received specimens from Muscatine, Iowa, from Mr. J. Greenblatt; also from Mr. Christian Hoeg, of Decorah, Iowa, who states that they seem to be quite common in that vicinity; and also from Sabula, Iowa, at which place Mr. J. C. Day and son had received during the winter of 1915 and 1916, up to the 17th of March, 1916, twenty-five pelts of "civet cats," trapped in the …