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The Present Tendencies In The Bacteriological Examination Of Water, Jack J. Hinman, Jr. Jan 1926

The Present Tendencies In The Bacteriological Examination Of Water, Jack J. Hinman, Jr.

Proceedings of the Iowa Academy of Science

No abstract provided.


Butler's Landing Outlier And Its Fossil Flora, John E. Adams Jan 1926

Butler's Landing Outlier And Its Fossil Flora, John E. Adams

Proceedings of the Iowa Academy of Science

The early geologists who surveyed the state reported many small, scattered patches of Pennsylvanian sandstone north and east of the principal Pennsylvanian area in Iowa, The outliers along the Iowa River north and east of Iowa City were among the first to be described. Subsequently more complete descriptions of these and other outliers in Johnson and adjacent counties have appeared in the publications of the Iowa Geological Survey and in other scientific journals. References to these articles can be found in Ia. Geol. Survey Rept. Vol. 22, 1912.


The Alumni News Letter, V9n1, January 1, 1925, Iowa State Teachers College Jan 1925

The Alumni News Letter, V9n1, January 1, 1925, 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 Jan 1925

Officers, Past Presidents, And Members, Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.


The Alumni News Letter, V8n3, July 1, 1924, Iowa State Teachers College Jul 1924

The Alumni News Letter, V8n3, July 1, 1924, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.


The Alumni News Letter, V8n1, January 1, 1924, Iowa State Teachers College Jan 1924

The Alumni News Letter, V8n1, January 1, 1924, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.


Table Of Contents Jan 1924

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.


The Address Of The President - A Century Of Botany In Iowa, L. H. Pammel Jan 1924

The Address Of The President - A Century Of Botany In Iowa, L. H. Pammel

Proceedings of the Iowa Academy of Science

A Century of Botany-It is certainly a pleasure to greet you here on this occasion, especially so, because of the nature of the honorable work performed by the scientists of the State of Iowa. It is customary for the retiring president to deliver an address of some kind. In looking over topics which have been chosen by various retiring presidents I find such titles as "Local Problems in Science," "What We Have Been Doing," "The Academy and the People," "Science of One Hundred Years Ago," "Some Problems of Heredity and Evolution," "Two Centuries of North American Lichenology," "Botany in Its …


Officers, Past Presidents, And Members, Iowa Academy Of Science Jan 1924

Officers, Past Presidents, And Members, Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.


Magnetic Properties Of Evaporated Iron Films, A. Sorenson Jan 1924

Magnetic Properties Of Evaporated Iron Films, A. Sorenson

Proceedings of the Iowa Academy of Science

A study was made of the magnetic properties of iron films deposited on tin foil in a high vacuum by the evaporation method used by J. C. Steinberg. The magnetization curves and hysteresis loops were obtained by an induction method in which the specimen, inserted in a search coil, was placed in a magnetic field of known strength and then suddenly removed from the search coil. The resulting flux was measured by means of a galvanometer which, in order to obtain the required sensitiveness, was kept on open circuit all the time except for an instant while the current passed …


Contributions To Knowledge By Gustavus Detlef Hinrichs, M.D., Ll.D. (Paper Presented At The Thirty-Eighth Annual Meeting Of The Iowa Academy Of Science), Charles Keyes Jan 1924

Contributions To Knowledge By Gustavus Detlef Hinrichs, M.D., Ll.D. (Paper Presented At The Thirty-Eighth Annual Meeting Of The Iowa Academy Of Science), Charles Keyes

Proceedings of the Iowa Academy of Science

As an original organizer and charter member of the Iowa Academy of Sciences, that society which is the parent of our present Academy, the latter holds with peculiar attachment the memory of the late Dr. Gustavus Hinrichs, who is, for more than a quarter of a century, also identified with the faculty of our State University as one of its most distinguished members. He further organizes and conducts for 15 years our State Weather Service, the first of the kind to be inaugurated in this country. A brief life-sketch of this gifted man appears in our Proceedings of last year, …


Production Of Hydrogen Sulphide By Members Of The Colon Group Of Bacteria, Frederick W. Mulsow, Frederick S. Paine Jan 1924

Production Of Hydrogen Sulphide By Members Of The Colon Group Of Bacteria, Frederick W. Mulsow, Frederick S. Paine

Proceedings of the Iowa Academy of Science

Not a little work has been done in the past few years in investigating the sulphur metabolism of the colon group of bacteria. So far no very definite conclusions seem to have been arrived at, and the results are rather conflicting. Myers (1920) suggests that hydrogen sulphide production in the intestinal tract is due to proteolytic organisms. He attempted to use hydrogen sulphide production for water analysis, but concludes: "There is no constant relationship between the number of colon bacilli present from different animals and the amount of H2S produced." Other workers have believed the production of hydrogen …


The House Fungus, Merulius Lacrymans (Jacq.) Fr., W. H. Davis Jan 1924

The House Fungus, Merulius Lacrymans (Jacq.) Fr., W. H. Davis

Proceedings of the Iowa Academy of Science

Merulius lacrymans is one of the wood-rotting fungi which are destroyers of trees, lumber, structural timbers and other forms of wood. Under certain conditions, this fungus is especially harmful to the wood in houses and for this reason it is known as the house fungus. The presence of fungi in wood is generally shown by a white floccose growth or mushroom-like sporophore on the exterior of the infected material. The house fungus announces its presence, only too late, by a cottony mass of hyphal threads spreading over the infected surfaces or emerging through cracks between walls and floors. This circular …


The Intrinsic Intensity And Percent Of Polarization Of Light Transmitted Through Deep Slits, L. P. Sieg Jan 1924

The Intrinsic Intensity And Percent Of Polarization Of Light Transmitted Through Deep Slits, L. P. Sieg

Proceedings of the Iowa Academy of Science

It is assumed that the light incident upon the first opening of a slit between various metals is diffracted in the usual manner, and finally emerges from the far end of the slit after repeated reflections. The reflecting coefficients of the various metals considered are calculated for the proper angles of incidence from a knowledge of the index of refraction of the metal, and from its coefficient of absorption. In view of the fact that the coefficients of reflections for light possessing an electric vector perpendicular are much larger than for light with the electric vector parallel to the plane …


In Memoriam: Archelaus G. Field, Charles Keyes, L. H. Pammel Jan 1924

In Memoriam: Archelaus G. Field, Charles Keyes, L. H. Pammel

Proceedings of the Iowa Academy of Science

No abstract provided.


The Alumni News Letter, V7n4, October 1, 1923, Iowa State Teachers College Oct 1923

The Alumni News Letter, V7n4, October 1, 1923, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.


The Alumni News Letter, V7n3, July 1, 1923, Iowa State Teachers College Jul 1923

The Alumni News Letter, V7n3, July 1, 1923, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.


Some Food Reactions Of Snails, E. W. Johns Jan 1923

Some Food Reactions Of Snails, E. W. Johns

Proceedings of the Iowa Academy of Science

The following work was done at the University of Chicago Zoological Laboratory under the supervision of Dr. W. J. Crozier to investigate primarily the method of innervation of the food reflex. For the studies, various forms of common snails were experimented with, but the domestic snail known as the Singapore was used for most of this work because of its ready availability and suitableness for the work due to its large size, activity and omniverousness. The main objection to them is that they do not swim on the surface of the water as do many forms. In order to obviate …


The Alumni News Letter, V7n1, January 1, 1923, Iowa State Teachers College Jan 1923

The Alumni News Letter, V7n1, January 1, 1923, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.


In Memoriam: Gustavus Detlef Hinrichs; James Edward Todd, Charles Keyes Jan 1923

In Memoriam: Gustavus Detlef Hinrichs; James Edward Todd, Charles Keyes

Proceedings of the Iowa Academy of Science

No abstract provided.


The Role Of The Vagi Of Gastric Motility In Necturus Maculatus, T. L. Patterson Jan 1923

The Role Of The Vagi Of Gastric Motility In Necturus Maculatus, T. L. Patterson

Proceedings of the Iowa Academy of Science

Previous work on the movements of the empty stomach of the Necturus has indicated that the controlling influence of the vagi is largely inhibitory. This phenomenon is contrary to that which exists in the stomachs of higher animals, although it has been shown by Hopf for the frog and by Bercovitz and Rogers for the turtle that the tenth nerve contains both motor and inhibitory nerve fibres to the stomach with the motor predominating, at least in the frog.


Officers, Past Presidents, And Members, Iowa Academy Of Science Jan 1923

Officers, Past Presidents, And Members, Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.


The Progress Of Research In The Coe College Radiological Laboratory, Scott W. Smith Jr. Jan 1923

The Progress Of Research In The Coe College Radiological Laboratory, Scott W. Smith Jr.

Proceedings of the Iowa Academy of Science

Ever since the discovery of x-rays by Prof. W. K. Röntgen in 1895, the physicist has played an important part in the advancement of knowledge leading to the use of x-rays in therapy. Doctor Coolidge with his high voltage tube made it possible to produce very penetrating x-rays; while Professor Dessauer of Germany in his study of the distribution of x-rays, Professor Duane of Harvard, and many other physicists, have aided materially in the harnessing of this potent form of radiation for use in therapy. Therefore in the establishment of the Radiological Research Bureau of Coe College, the primary aim …


Citation Of Authorities For Latin Names, Henry S. Conard Jan 1923

Citation Of Authorities For Latin Names, Henry S. Conard

Proceedings of the Iowa Academy of Science

To what extent is it significant to cite the names of authorities after the latin names of plants and animals? This is an old question but one which, it seems to me, is not yet fully settled. What is the best practice for you and for me? Three methods of citation are in current use. Some cite only the originator of the combination of genus and species, as in Bailey's Standard Cyclopedia of Horticulture (Nupar luteum, Sibth. and Smith). Others cite always the originator of the specific name, followed by the author of the combination when that is by another …


The Alumni News Letter, V6n4, October 1, 1922, Iowa State Teachers College Oct 1922

The Alumni News Letter, V6n4, October 1, 1922, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.


1922 Old Gold, Iowa State Teachers College Jan 1922

1922 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.


Proceedings Of The Thirty-Sixth Annual Session Of The Iowa Academy Of Science, Drake University, Des Moines, April 28 And 29, 1922: Minutes Of The Meeting; Staff & Committee Reports Jan 1922

Proceedings Of The Thirty-Sixth Annual Session Of The Iowa Academy Of Science, Drake University, Des Moines, April 28 And 29, 1922: Minutes Of The Meeting; Staff & Committee Reports

Proceedings of the Iowa Academy of Science

No abstract provided.


Officers, Past Presidents, And Members, Iowa Academy Of Science Jan 1922

Officers, Past Presidents, And Members, Iowa Academy Of Science

Proceedings of the Iowa Academy of Science

No abstract provided.


Description And Key Of The Genus Cucurbita, Fred C. Werkenthin Jan 1922

Description And Key Of The Genus Cucurbita, Fred C. Werkenthin

Proceedings of the Iowa Academy of Science

J. H. Trumbull, in a letter quoted in Bull. Torrey Bot. Club, Vol. 6:69-70; 1876, states, "I could never discover where the doubt came in, as to the American origin of several well-known varieties of these gourds, or Millions as some call them, or Pompions as I may call them. In England, the name 'squash' was understood to be of American origin. Robert Boyle mentions his experiment with the seed of 'squash' which is an Indian kind of pompion that grows apace." "Beverley (History of Virginia, 124) describes the Macocks as 'a sort of Melopepones, or lesser sort of …


The Founders Of The Art Of Plant Breeding, Fred C. Werkenthin Jan 1922

The Founders Of The Art Of Plant Breeding, Fred C. Werkenthin

Proceedings of the Iowa Academy of Science

The paper by Prof. Werkenthin on History of Plant Breeding was one of the assigned topics in the course given at Iowa State College on the History of Botany. The subject matter is so admirably treated that it has seemed wise to publish this as a posthumous paper. It was the last paper prepared by him, finished only a few weeks before he was taken sick.