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Arid Plateau-Plains As Features Of Eolic Erosion, Charles Keyes Jan 1912

Arid Plateau-Plains As Features Of Eolic Erosion, Charles Keyes

Proceedings of the Iowa Academy of Science

Of all geographic features peculiar to arid areas plateau-plains have long remained explicable. They stand out prominently among the many geologic phenomena of deserts which have been either greatly misinterpreted or not interpreted at all. For such conspicuous and common objects of landscape they strangely enough have attracted small critical notice from travelers. Hill is almost alone in giving them especial mention and a name.

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The First Reported Petrified American Lepidostrobus Is From Warren County, Iowa, John L. Tilton Jan 1912

The First Reported Petrified American Lepidostrobus Is From Warren County, Iowa, John L. Tilton

Proceedings of the Iowa Academy of Science

One day in the summer of 1904 a broken Lepidostrobus petrified nicely by iron pyrites was sent to me by Mr. Samuel Spear, then residing four miles south of Indianola. Each year the specimen was exhibited to the class in Geology when Carboniferous plants were illustrated and the explanation given that it was a remarkably rare and choice specimen of a cone, the like of which I had never seen in any museum; but the real value of the specimen was not fully appreciated till I handed the specimen to Professor Stuart Weller at The University of Chicago in December, …

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The Origin Of The Geodes Of The Keokuk Beds, Francis M. Van Tuyl Jan 1912

The Origin Of The Geodes Of The Keokuk Beds, Francis M. Van Tuyl

Proceedings of the Iowa Academy of Science

The presence of great numbers of geodes of varying size and degree of development in the Keokuk beds of the Central Mississippi Valley has long been known to geologists, but their origin has been, from the earliest times, a disputed question, and, although there has been considerable speculation upon the subject, no theory of their formation has been, as yet, widely held.

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A Study Of The Cherst Of The Osage Series Of The Mississippian System, Francis M. Van Tuyl Jan 1912

A Study Of The Cherst Of The Osage Series Of The Mississippian System, Francis M. Van Tuyl

Proceedings of the Iowa Academy of Science

The presence of a considerable amount of chert in the Burlington and Keokuk limestone members of the Osage series has been the cause of frequent comment, but no critical study of the material has ever been made. The chert attains its maximum development in the upper division of the Burlington limestone known as the Montrose chert. But nodules and inconstant seams of the same material appear, also, in the lower levels of the Burlington and frequently characterize the Keokuk limestone. In the latter formation, however, the chert is found at no definite level and is entirely wanting at some localities. …

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A New Apparatus For Measuring Small Intervals Of Time Independent Of Clock Or Chronograph, F. C. Brown Jan 1912

A New Apparatus For Measuring Small Intervals Of Time Independent Of Clock Or Chronograph, F. C. Brown

Proceedings of the Iowa Academy of Science

In the Physical Review for June, 1912, the author discusses the theory of an electrical method for measuring small intervals of time. Time is measured in terms of the throw of a ballistic galvanometer, which is in the circuit of a Wheatstone's bridge during the interval.

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A Method Of Determining Whether The Restoring Torque Is Proportional To The Torsional Strain During The Vibration Of A Torsion Pendulum, L. P. Sieg Jan 1912

A Method Of Determining Whether The Restoring Torque Is Proportional To The Torsional Strain During The Vibration Of A Torsion Pendulum, L. P. Sieg

Proceedings of the Iowa Academy of Science

During some experiments on the elasticity of a certain type of wires the question arose as to whether the restoring torque, during the actual vibration of the system was at all times proportional to the torsional strain measured from the zero position. It is easy to determine the answer to this question in the case of a static twist of the wire, but there seemed at first to be an unsurmountable experimental difficulty in determining the answer for the case where the wire is actually vibrating.

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Notes Of The Food Of The Black Crowned Night Heron In Captivity, B. H. Bailey Jan 1912

Notes Of The Food Of The Black Crowned Night Heron In Captivity, B. H. Bailey

Proceedings of the Iowa Academy of Science

While studying the bird life of Eagle Lake in Hancock County, Iowa, we captured and brought alive to Cedar Rapids an adult Black Crowned Night Heron (Nycticorax Nycticorax Naevius.) It was kept at Bever Park for observation, and on account of the scarcity of frogs and fish, various kinds of food were presented to it, among which were some white rats that, being prolific, were used by the keeper as food for the caged hawks and owls. The Heron seemed to take unhesitatingly to these, and would kill and eat a rat with apparent relish.

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A Remarkable Flight Of Broad Winged Hawks, B. H. Bailey Jan 1912

A Remarkable Flight Of Broad Winged Hawks, B. H. Bailey

Proceedings of the Iowa Academy of Science

On Friday a.m., September 22, 1911, a flock of Broad Winged Hawks (Buteo latissimus Wils.), remarkable for its size and compact character, passed about two miles north of Cedar Rapids, Iowa.

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Notes On A Collection Of Mammals From Northwestern Iowa, Alexander G. Ruthven, Norman A. Wood Jan 1912

Notes On A Collection Of Mammals From Northwestern Iowa, Alexander G. Ruthven, Norman A. Wood

Proceedings of the Iowa Academy of Science

The University of Michigan Museum has acquired a considerable number of specimens of mammals from Northwestern Iowa during the past five years. Most of the material was obtained by the expedition of 1907, but a number of specimens have been received from residents. The museum ls particularly indebted to Mr. Nels Hansen, of Ruthven, Iowa, who has sent in a considerable amount of valuable material

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Contribution To The Herpetology Of Iowa, Ii, Alexander G. Ruthven Jan 1912

Contribution To The Herpetology Of Iowa, Ii, Alexander G. Ruthven

Proceedings of the Iowa Academy of Science

The herpetology of Iowa is still so little known that material from the state is greatly to be desired, particularly if it comes in the form of extensive collections from particular localities. The writer has, through the kindness of Prof. H. W. Norris of Grinnell College, been able to examine such a collection from the vicinity of Grinnell, Poweshiek County, and the results seem to be of sufficient interest to warrant publication.

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A Systematic Outline Of The Reduviidae Of North America, Stanley R. Fracker Jan 1912

A Systematic Outline Of The Reduviidae Of North America, Stanley R. Fracker

Proceedings of the Iowa Academy of Science

The following bibliography is intended to include only those works in which a new contribution is made to the study of the family. I have not had access to some, but the descriptions of all species except those of Provancher have been quoted by Champion, Uhler or Stal and are thus made available. These books and papers have been freely used, especially for verification of details and for localities, credit being given in those cases where an author is wholly or partially responsible for the characters used in keys, etc.

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Index Jan 1912

Index

Proceedings of the Iowa Academy of Science

No abstract provided.

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Spring Term Commencement [Program], June 6, 1911, Iowa State Teachers College Jun 1911

Spring Term Commencement [Program], June 6, 1911, Iowa State Teachers College

UNI Commencement Programs

The program of the commencement ceremonies, including a list of institutional leadership, a list of the departments by college, awards given at the ceremonies, and a list of undergraduate and graduate degree candidates.

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Courses Of Study And Program Of Recitations, 1911-1912, Iowa State Teachers College Jun 1911

Courses Of Study And Program Of Recitations, 1911-1912, 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.

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Summer Term, 1911, Iowa State Teachers College Mar 1911

Summer Term, 1911, 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.

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Notes On Methods For The Study Of Amphibian Eggs And Larvae, Albert Kuntz Jan 1911

Notes On Methods For The Study Of Amphibian Eggs And Larvae, Albert Kuntz

Proceedings of the Iowa Academy of Science

In the preparation of amphibian eggs and larvae for histological study, the technique employed is a factor of primary importance. The amphibian egg represents the final attempt on the part of nature to produce a large yolk-laden egg in which cleavage involves the entire ovum. As a result of this method of cleavage all the embryonic tissues, during the early stages of development, contain more or less yolk. Furthermore, the ventral region of the young embryo contains a large, compact yolk-mass which is not readily penetrated by the fixing and the clearing agent, and the embryonic tissues show a greater …

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Notes On Iowa Saprophytes, Thomas H. Macbride Jan 1911

Notes On Iowa Saprophytes, Thomas H. Macbride

Proceedings of the Iowa Academy of Science

The saprophytic fungi of Iowa have been very slightly studied. Owing to their high economic importance parasitic forms have claimed almost exclusively the attention of mycologists. Pure science, however, must not be neglected. Without it applied science is impossible and no study of natural objects is more praiseworthy than that which seeks to know these for themselves alone.

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Notes On Some Iowa Reptiles, M. P. Somes Jan 1911

Notes On Some Iowa Reptiles, M. P. Somes

Proceedings of the Iowa Academy of Science

The reptiles, while scarce in number of individuals and relatively scarce in number of species in the Iowa fauna, still constitute a group of considerable importance from an economic standpoint as well as zoologically. The group is very generally neglected, this possibly in part because of the almost universal prejudice and in part because of the somewhat scattered and technical nature of the literature. But little has appeared concerning the Reptilia of Iowa since the Osborn Catalogue of the Animals of Iowa and since, from a study of the material in the museum of Iowa University and from notes and …

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Studies In Variation Of Red Clover, Edna C. Pammel, Clarissa Clark Jan 1911

Studies In Variation Of Red Clover, Edna C. Pammel, Clarissa Clark

Proceedings of the Iowa Academy of Science

Variation in Trifolium pratense presents many interesting problems, some of which have been under consideration during the past two seasons by the contributors to this paper. General relationships between number of flowers in the head, and number of seeds produced, the influence of soils, and seasons, comparative dimensions of the flowers, and of pollen grains, were the particular features studied.

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1911 Old Gold, Iowa State Teachers College Jan 1911

1911 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.

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Vaccination Against Typhoid Fever, Henry Albert Jan 1911

Vaccination Against Typhoid Fever, Henry Albert

Proceedings of the Iowa Academy of Science

The term vaccination was originally used to designate the introduction of material from pustules of cows affected with cowpox into the human being to protect against smallpox. Such produced a mild form of the disease and conferred immunity to the more severe type as represented by smallpox proper. The vaccine represents, then, a weakened or attenuated form of the virus. The term, as now used, applies to the virus of any infectious disease, —the virulence of which virus has been diminished.

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Volcanic Phenomena Of Coon Butte Region, Arizona, Charles R. Keyes Jan 1911

Volcanic Phenomena Of Coon Butte Region, Arizona, Charles R. Keyes

Proceedings of the Iowa Academy of Science

It will be recalled that Coon Butte is a low eminence, with a shallow depression in the summit about half a mile across that has become widely known on account of the supposition that this crater-like basin was formed by a huge meteor striking the earth at this point and throwing up the low wall all around. Contrary to the recently expressed views regarding the origin of this remarkable crater the most critical evidences seem to indicate that this feature of the local landscape is only one of the many manifestations of the explosive type of vulcanism so prevalent throughout …

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The Development Of Lymph Channels In Turtles By The Fusion Of Mesenchymal Spaces, Frank A. Stromsten Jan 1911

The Development Of Lymph Channels In Turtles By The Fusion Of Mesenchymal Spaces, Frank A. Stromsten

Proceedings of the Iowa Academy of Science

The theory that the lymphatic system is budded off from the venous system is a direct product of a special method of investigation, i.e., the injection method.

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Illuminating Engineering - A New Profession, Arthur H. Ford Jan 1911

Illuminating Engineering - A New Profession, Arthur H. Ford

Proceedings of the Iowa Academy of Science

Since the time of the cave dwellers men have found artificial illumination a convenience if not a necessity; but only within the present century has the design of illumination system been considered for such importance as to become a special branch of engineering. In fact the first American college course bearing the name illumination was planned and taught by the writer in 1901. This was given at the University of Colorado and occupied two periods a week for a semester. The profession is so new that it is not mentioned in even the most recent dictionaries; so it is thought …

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Glaciated Rock Surfaces Near Linn And Near Quarry, Iowa, With A Table Of The Bearings Of Glacial Striae In Iowa, W. H. Norton Jan 1911

Glaciated Rock Surfaces Near Linn And Near Quarry, Iowa, With A Table Of The Bearings Of Glacial Striae In Iowa, W. H. Norton

Proceedings of the Iowa Academy of Science

Linn is a junction of the Chicago, Rock Island and Pacific Railway, situated four miles northwest of Cedar Rapids. About one mile west of this station a rock cut, formerly used by the Chicago, Milwaukee and St. Paul Railway, scarps the bluffs bordering the Cedar River. At the extreme north end of the cut, 14 feet above the trackway, and about 75 feet above the level of the river, there is exposed by the retreat of a cover of yellow till and loess a surface of less than two feet square, developed on glaciated limestone belonging to the Acervularia davidsoni …

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Index Jan 1911

Index

Proceedings of the Iowa Academy of Science

No abstract provided.

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Some Fungus Diseases Of Trees, L. H. Pammel Jan 1911

Some Fungus Diseases Of Trees, L. H. Pammel

Proceedings of the Iowa Academy of Science

The researches of Hartig, Tubeuf, Metcalf, Von Schrenk, and others have shown that quite a large number of wood destroying fungi belong to the Agaricaceac, Hypochnaceae, Polyporaceae, Hydnanceae, and Thelephoraceae.

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Some Features Of The Bering River Coal Field, Alaska, G. F. Kay Jan 1911

Some Features Of The Bering River Coal Field, Alaska, G. F. Kay

Proceedings of the Iowa Academy of Science

The Bering River coal field lies a few miles inland from the north shore of Controller Bay, an indentation of the Pacific coast about 1,200 miles from Seattle. In this field are the Cunningham claims which were given much publicity in connection with the Pinchot-Ballinger controversy. Much of the coal area is within the drainage basin of the Bering River. To the north of the field is the Martin River glacier, with the lofty, snowcapped Chugach range of mountains beyond; to the east of the field, and extending for many miles, is the Bering Pielmont glacier.

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Graphics Of Ore-Origin, Charles R. Keyes Jan 1911

Graphics Of Ore-Origin, Charles R. Keyes

Proceedings of the Iowa Academy of Science

In the main ore deposits are precipitated in aqueous solutions. Solution, transportation and deposition of ore-materials are distinctly processes operating through the medium of subterranean waters. The sources of the ore-minerals, the courses they follow through the geologic formations, and the immediate causes of their localization, are factors of prime importance in the consideration of ore-genesis. Obscure as is the migration and changes of ore-materials it is possible, as will be seen presently, to represent graphically the general courses.

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Notes In Regard To Efficiencies Of Luminous Flames, G. W. Stewart Jan 1911

Notes In Regard To Efficiencies Of Luminous Flames, G. W. Stewart

Proceedings of the Iowa Academy of Science

An investigation of the efficiency of luminous flames would be of interest. Results obtained incidentally were studied, showing that a cylindrical acetylene flame is not so efficient as a flat acetylene flame when judged by the proportion of its radiant energy that is visible. The amount of visible radiant energy that a given quantity is able to furnish should also be considered. Experiments with a flat kerosene flame show a height of flame at which the candle-power-hours-per-gram is a maximum. The problem of obtaining the most efficient flame, in the broadest sense, is complex. It is advisable to get the …

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