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Toxic Algae In Iowa Lakes, Earl T. Rose
Toxic Algae In Iowa Lakes, Earl T. Rose
Proceedings of the Iowa Academy of Science
Almost all of the natural lakes of Iowa develop at certain periods throughout the summer and fall months, heavy growths of small floating plant life commonly known as blue-green algae. These tiny, primitive organisms develop rapidly in certain lakes, and often form unsightly, paint-like scums over calm lake surfaces, and particularly along lee shores. Upon decomposition of these heavy scums, or "bloom" as they are commonly termed, terrifically foul, pig-pen odors issue therefrom, making human living conditions in the vicinity intolerable, and limiting to a large degree all aquatic recreation. In addition to these unwholesome attributes, certain species of blue-green …
A Study Of The Artifacts Of The Post-Columbian Indian Culture Of The Southeastern United States, John Stouffer
A Study Of The Artifacts Of The Post-Columbian Indian Culture Of The Southeastern United States, John Stouffer
Proceedings of the Iowa Academy of Science
This paper is an effort to study and analyze some of the culture objects of the early American Indians of the Southeastern United States. The source of these is the A. J. Powers Collection which is presently on exhibit in the Museum of Cornell College, Mt. Vernon, Iowa.
Congenital Abnormalities Associated With Vitamin E Malnutrition, Byron H. Thomas, Dorothy Wei Cheng
Congenital Abnormalities Associated With Vitamin E Malnutrition, Byron H. Thomas, Dorothy Wei Cheng
Proceedings of the Iowa Academy of Science
Congenital abnormalities are known to occur occasionally in man and farm livestock, and frequently in laboratory animals subjected to certain types of experimentation. A high percentage of the cases are fatal to the young depending on the nature and severity of the complications. In many instances death of the affected young occurs during pregnancy or parturition. Should the feti survive parturition death usually follows shortly thereafter. Extended survival occurs in a small percentage of young and these are mildly to severely handicapped in one or more of a multiplicity of ways. There are many causes of congenital abnormalities. Some are …
Notes On The Occurrence Of Birds During The Winters Of 1948-1950, In Northern Emmet County, Iowa, Henry G. Weston Jr.
Notes On The Occurrence Of Birds During The Winters Of 1948-1950, In Northern Emmet County, Iowa, Henry G. Weston Jr.
Proceedings of the Iowa Academy of Science
During the winters of 1947-1948, 1948-1949 and 1949-1950 the author gathered data on the occurrence of birds in northern Emmet County, Iowa. Although data were gathered from February through July of 1948 and January through May of 1949 and 1950, this paper, for convenience, includes only the winter periods prior to March 1. Twenty days were spent in the field in the winter period of 1948, 46 days during 1949 and 45 days during 1950.
Hydrologic Comparisons For Floods Of June 1947 In Iowa, L. C. Crawford
Hydrologic Comparisons For Floods Of June 1947 In Iowa, L. C. Crawford
Proceedings of the Iowa Academy of Science
Man has always been plagued by floods and it is reasonable to expect that he will continue to be faced with a variety of flood problems in the years to come. The great floods of June 1947 in Iowa were a tragic reminder of the continuing danger which Man faces from excess rainfall and runoff. Those floods were outstanding, not only with respect to the depths and intensities of the rainfall which produced them, but also with regard to the maximum rates and total amounts of runoff which resulted and the tremendous quantities of soil which were washed from the …
Specific Tissue Responses Of Some Weeds To 2-4 Dichlorphenoxyacetic Acid, J. E. Sass, E. P. Sylwester
Specific Tissue Responses Of Some Weeds To 2-4 Dichlorphenoxyacetic Acid, J. E. Sass, E. P. Sylwester
Proceedings of the Iowa Academy of Science
A survey of the specific responses of some common weeds to 2-4 D has revealed considerable diversity with respect to the tissues involved and the relative extent of hyperplasia and hypertrophy. The present report is confined to three weeds showing strikingly contrasting reactions.
The Mechanical Aptitude Of Drivers In Relation To Performance And The Wheel, Charles Miller, A. R. Lauer
The Mechanical Aptitude Of Drivers In Relation To Performance And The Wheel, Charles Miller, A. R. Lauer
Proceedings of the Iowa Academy of Science
Incidental observation of Oriental people leads the average Occidental to conclude that they do not have a high level of mechanical aptitude. Tales of Oriental drivers by eye witnesses from the Far East would particularly support such observations of automobile drivers. At Iowa State College during the winter of 1946, thirty Chinese and Japanese students taking special agricultural extension and engineering work in the United States were enrolled in the driver training course given regularly throughout the year. Although the number was limited, it was deemed advisable to make a systematic study of the progress of these learners in order …
A Note On Axis Restoration In A Gymnosperm Tree, Robert B. Wylie
A Note On Axis Restoration In A Gymnosperm Tree, Robert B. Wylie
Proceedings of the Iowa Academy of Science
Injury to the major axis of a tree with excurrent growth often results in the development of a dwarfed or unsymmetrical crown. In the case of certain gymnosperms the lost apical shoot can be restored by bending upward one of the adjacent lateral branches and fastening it in upright position. In this way it may be induced to develop into a radical, lead shoot and dominate the further growth of the tree. While this practice is fairly well known it should occasionally be brought to the attention of the general public. The following paragraphs record another instance of the successful …
Mme. Caroline Testout: The Grand Dame Of The Roses, Clark D. Paris, T. J. Maney
Mme. Caroline Testout: The Grand Dame Of The Roses, Clark D. Paris, T. J. Maney
Proceedings of the Iowa Academy of Science
In all breeding work one finds that certain individuals are outstanding in the production of superior progeny. In animal breeding these individuals form the basis for pedigreed stock. An intensive study on the parentage of rose varieties has revealed that certain roses also have produced more named offspring than others. To obtain this information, it was necessary to make a search through the world's most important literature on the rose. This study resulted in the compilation of an index of about 5,000 rose varieties on which parentage data had been recorded.
The Pocket Mouse (Perognathus Flavescens): A New Species In Iowa, Emmett B. Polderboer
The Pocket Mouse (Perognathus Flavescens): A New Species In Iowa, Emmett B. Polderboer
Proceedings of the Iowa Academy of Science
The pocket mouse, as near as we can determine, has not been reported as occurring within the state. The purpose of this report, therefore, is to give a description of the species Perognathus ftavescens obtained in Black Hawk County, Iowa, during the summer of 1936.
The Removal Of Fluorine From Drinking Waters In The State Of Iowa, C. A. Kempf, D. A. Greenwood, V. E. Nelson
The Removal Of Fluorine From Drinking Waters In The State Of Iowa, C. A. Kempf, D. A. Greenwood, V. E. Nelson
Proceedings of the Iowa Academy of Science
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) have contributed greatly to our knowledge of the distribution of fluorine in drinking waters and the effect of such waters in the production of mottled enamel of the teeth. Smith, Lantz, and Smith (1), of the University of Arizona, were the first to show that this tooth defect is due to fluorides in the drinking water; they have analyzed the fluoride concentration of waters …
The Occurrence Of Mottled Enamel In Iowa, Carl T. Ostrem, D. A. Greenwood, H. A. Wilhelm, Victor E. Nelson
The Occurrence Of Mottled Enamel In Iowa, Carl T. Ostrem, D. A. Greenwood, H. A. Wilhelm, Victor E. Nelson
Proceedings of the Iowa Academy of Science
Mottled enamel is a peculiar condition of the teeth. The teeth become chalky white in appearance and lack the lustre and translucency observed in the enamel of normal teeth. They are generally stained in an irregular manner and the dark brown stain supposedly accumulates between the enamel rods. However, some individuals have severe mottling of the enamel with little or no stain. We do not know the nature of the substance responsible for the stain. The teeth become soft and the dentist experiences difficulty with the teeth retaining fillings. It is not known for certain if mottled teeth decay more …
Some Rearrangement Reactions Of Organosodium And Organolithium Compounds, Henry Gilman, Fritz W. Breuer
Some Rearrangement Reactions Of Organosodium And Organolithium Compounds, Henry Gilman, Fritz W. Breuer
Proceedings of the Iowa Academy of Science
In continuation of rearrangement reactions of organometallic compounds, it was desirable to ascertain whether R-Metal combinations (free of halogen or other acidic groups) would react after the manner of benzylmagnesium chloride types with compounds like formaldehyde, for example. This last reaction gives not only the normal product (beta-phenylethyl alcohol), but also o-tolyl carbinol. It has been shown that the corresponding organosodium and organolithium compounds behave in a similar manner. Incidentally, it is possible to prepare some organolithium compounds, like phenyl-lithium, very conveniently, in a short time, and in excellent yields in the customary three-necked flasks.
Effects Of Various Amounts Of Calcium Carbonate On The Degree Of Saturation Of Some Iowa Soils With Bases, R. H. Walker, P. E. Brown
Effects Of Various Amounts Of Calcium Carbonate On The Degree Of Saturation Of Some Iowa Soils With Bases, R. H. Walker, P. E. Brown
Proceedings of the Iowa Academy of Science
Untreated Grundy silt loam was found to contain 9.30 M.E. of exchangeable hydrogen and 14.03 M.E. of exchangeable bases per 100 grams of soil in the base-exchange complex. Six months after the same soil had been treated with chemically pure calcium carbonate at the rate of six tons per acre the exchangeable hydrogen content was only 1.15 M.E. and the exchangeable base content was 24.54 M.E. The calcium carbonate treatment, therefore, increased the degree of saturation with bases from 60.13 per cent to 95.52 per cent.
Organomagnesium Compounds Containing Solubilizing Amino Groups, Henry Gilman, Stanton A. Harris, Chuan Liu
Organomagnesium Compounds Containing Solubilizing Amino Groups, Henry Gilman, Stanton A. Harris, Chuan Liu
Proceedings of the Iowa Academy of Science
There is an uncommon demand, particularly in cancer and related studies, for organomagnesium compounds which contain amino groups to increase the solubility of products and also endow them with certain desirable physiological properties. With this in mind a series of Grignard reagents is being prepared, the members of which contain the -MgX group attached to carbon in a molecule having a basic group like -NR2 or in a substituted pyridine, quinoline, etc., grouping. Such RMgX compounds are formed from the corresponding RX compounds with somewhat less ease than from RX compounds having no basic grouping; however, they appear to …
The Fauna Of The Chemung Formation Of Southwestern New York, H. Donald Curry
The Fauna Of The Chemung Formation Of Southwestern New York, H. Donald Curry
Proceedings of the Iowa Academy of Science
The Randolph quadrangle is located just north of the Pennsylvania state line in the southern part of Cattaraugus County, in southwestern New York. During the summer of 1929, the writer spent six weeks in the field in the southern part of that quadrangle, and this paper is based upon the work done and the fossils collected at that time.
The Address Of The President - Atomicity In Physical Nature, Leroy D. Weld
The Address Of The President - Atomicity In Physical Nature, Leroy D. Weld
Proceedings of the Iowa Academy of Science
Atomicity in Physical Nature-From the earliest times men have been curious about the makeup of material things and the mechanism of visible processes. When Empedocles reasoned that all change is merely a rearrangement of permanent, unchangeable parts - an idea which the YAtomists and Anaxagoras later elaborated in greater detail - he merely gave expression to what seems to be an intuitive conviction about Nature in general. Anaxagoras recognized the existence of atoms and the fact that there are different kinds of atoms; and he furthermore introduced the grotesque idea of atoms endowed with intelligence, by way of accounting for …
In Memoriam: Susan Grace Jewell; William Paul Yancy; Rollo Harrison Moore, Fern M. Williams, U. A. Hauber, H. S. Longley
In Memoriam: Susan Grace Jewell; William Paul Yancy; Rollo Harrison Moore, Fern M. Williams, U. A. Hauber, H. S. Longley
Proceedings of the Iowa Academy of Science
No abstract provided.
The Fuana Of The State Quarry Beds, M. A. Stainbrook, H. S. Ladd
The Fuana Of The State Quarry Beds, M. A. Stainbrook, H. S. Ladd
Proceedings of the Iowa Academy of Science
The State Quarry beds of Johnson County, Iowa, comprise a very local but decidedly interesting limestone formation of Upper Devonian age. In spite of its restricted distribution the formation has been the subject of some investigation, first because of the abundant fish remains found in certain beds, and secondly because other horizons furnished large blocks suitable for building purposes.
Fossil Annelid Jaws From The Iowa Devonian, Walter V. Searight
Fossil Annelid Jaws From The Iowa Devonian, Walter V. Searight
Proceedings of the Iowa Academy of Science
Recently in the process of experiment on limestones from the Cedar Valley formation near Iowa City, Iowa, 0.5 n. hydrochloric acid was used to decompose the carbonates present. In the residues obtained by filtration and washing of the resulting product there were discovered some organic remains almost microscopic in size which were very similar in appearance to those of the jaws of certain groups of recent marine annelids. Further investigations revealed several complete specimens and a number of fragments which show that these remains probably are distributed quite generally through the Cedar Valley limestones. They are now known to occur …
Some Fossils From An Outcrop In Des Moines, A. O. Thomas
Some Fossils From An Outcrop In Des Moines, A. O. Thomas
Proceedings of the Iowa Academy of Science
At the time of the meeting of the Iowa Academy of Science at Drake University, Des Moines, in April, 1922, the writer accompanied by Mr. Ben Hur Wilson made a brief visit to the clay pit of the Capital City Clay Company. This pit is located along the Chicago Great Western railroad tracks south of Raccoon river in the city of Des Moines and while perhaps the most extensive, is typical of similar exposures in the city. About thirty-five to forty feet of bluish shale and a few thin beds of sandstone and sandy shale are exposed and worked for …
Status Of Certain Rhynchonellid Brachiopods From The Devonian Of Iowa, A. O. Thomas, M. A. Stainbrook
Status Of Certain Rhynchonellid Brachiopods From The Devonian Of Iowa, A. O. Thomas, M. A. Stainbrook
Proceedings of the Iowa Academy of Science
At the first Annual meeting of the Iowa Academy of Science at Iowa City, June 23, 1876, Professor Samuel Calvin read a paper on "New Species of Paleozoic Fossils." The Proceedings of the meeting do not give an abstract of the paper but in the American Naturalist, Vol. 11, pp. 57-58, a brief abstract says that "Prof. Samuel Calvin, of the State University of Iowa, described seven New Species of Paleozoic Fossils found mainly in Howard and Floyd counties, Iowa." One of these species was Rhynchonella alta which occurs in the Lime Creek shales of Floyd …
Notes On The Flora Of Yosemite And Adjacent Regions, L. H. Pammel
Notes On The Flora Of Yosemite And Adjacent Regions, L. H. Pammel
Proceedings of the Iowa Academy of Science
I shall not try to make an extensive paper on the flora of the Yosemite, but merely to record my impression of this interesting floristic region.
Bird Banding And Incidental Studies, Dayton Stoner
Bird Banding And Incidental Studies, Dayton Stoner
Proceedings of the Iowa Academy of Science
While the phenomena connected with bird migration have been studied for more than two thousand years much is yet to be learned of this most interesting and still more or less obscure characteristic of our "feathered bipeds." In attempting to throw some light upon their movements new methods have been devised and, in a degree, perfected. Until recently it has been the aim of ornithologists to study the migratory habits of species or even of larger zoological groups; but of late an effort has been made to study individuals of a species by marking the birds in some permanent manner …
Study Of A Section Of The Oregon Coast Flora, Morton E. Peck
Study Of A Section Of The Oregon Coast Flora, Morton E. Peck
Proceedings of the Iowa Academy of Science
The following paper is the result of a somewhat detailed study of the flora of a small section of the Oregon coast in Lincoln County, namely, that lying between Yaquina Head and the mouth of Yachats River. These two points are distant from each other in a straight line about twenty-five miles; by the beach, striking across the mouths of the bays, the distant is perhaps twenty-eight miles. The flora in the neighborhood of Seal Rocks, about midway between the two points, received the most attention, though the whole ground was gone over rather carefully. This section is fairly representative …
Indian Pottery Of The Oneota Or Upper Iowa River Valley In Northeastern Iowa, Ellison Orr
Indian Pottery Of The Oneota Or Upper Iowa River Valley In Northeastern Iowa, Ellison Orr
Proceedings of the Iowa Academy of Science
The Oneota, or Upper Iowa, a small river about eighty miles in length, flows through Winneshiek and Allamakee Counties in Iowa, close to their northern border, which is also the line between this state and Minnesota. It flows through a beautiful, winding valley, which has a width of half a mile, and is bounded by precipitous bluffs. The glacial terraces which extend up this valley for forty miles to Decorah have afforded very abundant evidences of a former considerable Indian population. Earth embankments, mounds, and camp sites have yielded up a treasure of implements, weapons and ornaments. Notable among these …
On The Occurence Of Precious Stones In The Drift, Garrett A. Muilenburg
On The Occurence Of Precious Stones In The Drift, Garrett A. Muilenburg
Proceedings of the Iowa Academy of Science
The subject of precious stones in the glacial drift is brought before the public from time to time by the report of gems being found accidentally either in or upon the drift. Most of the gems are diamonds and occasionally are of considerable size and value. No diamonds have been reported from the drift of Iowa. Several of good quality have been reported from Wisconsin while others have been found in Michigan, Ohio and Indiana.
On Certain Points In The Anatomy Of Siren Lacertina, H. W. Norris
On Certain Points In The Anatomy Of Siren Lacertina, H. W. Norris
Proceedings of the Iowa Academy of Science
In connection with a study of the distribution of the cranial nerves of Siren, the results of which will be published in the near future, the writer found certain features of the general anatomy that seem worth especial notice.
Delayed Germination, L. H. Pammel, Charlotte M. King
Delayed Germination, L. H. Pammel, Charlotte M. King
Proceedings of the Iowa Academy of Science
In 1901 there was begun a study of the germination of weed seeds under different conditions. It was observed that a large number of the weed seeds did not germinate freely in the fall.