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An Annual White Sweet Clover, L. H. Pammel, Charlotte M. King Jan 1918

An Annual White Sweet Clover, L. H. Pammel, Charlotte M. King

Proceedings of the Iowa Academy of Science

Sometime previous to the spring of 1916 Professor Hughes of the Farm Crops Department of the Iowa State College found in the experimental plots of the common white sweet clover (Melilotus alba (L) Lam), a form which produced an annual root and died at the close of the season.

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The Composition And Digestibility Of Sudan Grass Hay, W. G. Gaessler, A. C. Mccandlish Jan 1918

The Composition And Digestibility Of Sudan Grass Hay, W. G. Gaessler, A. C. Mccandlish

Proceedings of the Iowa Academy of Science

The introduction of Sudan grass (Andropogon sorghum var.) into the United States took place less than nine years ago, but since then this crop has become widely known and its popularity is rapidly increasing. Sudan grass, being an annual, does not make a good pasture plant, but gives excellent results as a hay or soiling crop; it might also be successfully made into silage if mixed with a legume.

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Some Improved Laboratory Methods, W. S. Hendrixson Jan 1918

Some Improved Laboratory Methods, W. S. Hendrixson

Proceedings of the Iowa Academy of Science

Three laboratory experiments for students in beginning chemistry are here submitted in the hope that they may be found useful to other teachers of chemistry as they have been helpful in the author's laboratory.

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In Memoriam: J. Howard Frazier; Glenn I. Tenney; Robert B. Dodson, L. H. Pammel, A. O. Thomas, G. W. Stewart Jan 1918

In Memoriam: J. Howard Frazier; Glenn I. Tenney; Robert B. Dodson, L. H. Pammel, A. O. Thomas, G. W. Stewart

Proceedings of the Iowa Academy of Science

No abstract provided.

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The Alumni News Letter, V2n1, January 1, 1918, Iowa State Teachers College Jan 1918

The Alumni News Letter, V2n1, January 1, 1918, Iowa State Teachers College

The Alumni News Letter

Contains news of the College and its alumni.

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The General Classification Of Higher Plants, Henry S. Conard Jan 1918

The General Classification Of Higher Plants, Henry S. Conard

Proceedings of the Iowa Academy of Science

A large part of our thinking about living things is bound up with some system of classification. This system is at once the product of the best thought, and a guide to further thinking. The function of classification as a guide is peculiarly important to beginners. It is therefore extremely desirable that classification should represent correctly the most approved conclusions of the science in question. At the present time current usage in botanical classification is not in harmony with the most approved conclusions. The following tabulation and discussion is an attempt to express recent morphological thought in its bearing on …

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The Germination Of Some Trees And Shrubs And Their Juvenile Forms, L. H. Pammel, C. M. King Jan 1918

The Germination Of Some Trees And Shrubs And Their Juvenile Forms, L. H. Pammel, C. M. King

Proceedings of the Iowa Academy of Science

In the proceedings of the Iowa Academy of Science, 1917, we published a paper on the germination and the juvenile forms of some oaks, mostly species native to Iowa. In this paper some of the literature on the subject was given. C. S. Sargent has touched on the germination of many of the species of North America, in some cases in detail. Germination of exotic species is described by Tubeuf. It seemed well, therefore, to continue observations on the germination of Iowa species, and a few not native to the state are included. Little specific seems to be known about …

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The Fern Flora Of Northeastern Iowa, T. J. Fitzpatrick Jan 1918

The Fern Flora Of Northeastern Iowa, T. J. Fitzpatrick

Proceedings of the Iowa Academy of Science

The writer spent the months of June and July, 1895, in this portion of Iowa, camping and traveling along Oneota or Upper Iowa and the Mississippi Rivers. While all available botanical specimens were collected special attention was given to the ferns and a good representation was secured. In the following year Mr. Herbert Goddard, then a resident of Decorah, Winneshiek County, sent the writer a collection he had secured in the vicinity of his home. During the years from 1899 to 1902 the writer had a valued correspondent, Mr. Ellison Orr, who resided at Waukon, Allamakee County. Mr. Orr's fine …

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Contributions To The Geology Of Southwestern Iowa, George L. Smith Jan 1918

Contributions To The Geology Of Southwestern Iowa, George L. Smith

Proceedings of the Iowa Academy of Science

During the past summer (1917) Geologic work has been engaged in as opportunity offered in Montgomery, Page, and Fremont Counties. The fault line north of Thurman has been definitely located, on East Nishnabotna river much information of importance has been obtained by observation and study of the different outcrops from Essex north to Stennett, and on Nodaway river at Clarinda, Shambaugh, and Braddyville outcrops were visited and fossil collections made.

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1918 Old Gold, Iowa State Teachers College Jan 1918

1918 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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Temperature-Time Relations In Canned Foods During Sterilization, George E. Thompson Jan 1918

Temperature-Time Relations In Canned Foods During Sterilization, George E. Thompson

Proceedings of the Iowa Academy of Science

Bacteriologists have found that the death rate of the bacteria which cause spoilage in canned goods depends upon the temperature to which the bacteria are subjected. In order, therefore, to establish the bacteriology of canning on a firm scientific basis it is necessary to know the time at which certain critical temperatures are attained by the foods which are subjected to the sterilization process. This paper shows the result of an attempt to work out by a combination of mathematical theory and experiment the temperature-time curves for certain foods in containers of any size and for any practical temperature range.

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Food Conservation And Economic Entomology, R. L. Webster Jan 1918

Food Conservation And Economic Entomology, R. L. Webster

Proceedings of the Iowa Academy of Science

Damage by insects to crops is generally recognized to be of great importance. Not infrequently we see estimates of losses, but even these fail to impress most of us until some widespread insect depredation occurs, such as an outbreak of armyworms, or of white grubs. Several years ago; at the request of President Raymond A. Pearson, the writer made the following estimate of the annual losses caused by insects in Iowa.

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Plants Of Southeastern Alaska, J. P. Anderson Jan 1918

Plants Of Southeastern Alaska, J. P. Anderson

Proceedings of the Iowa Academy of Science

The following list of species is based on collection and observations by the writer except in the case of a few grasses and sedges from Sitka of which specimens are in the herbarium of the U. S. Agricultural Experiment Station at that place.

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Further Work In Acid Potassium Phthalate As A Standard In Volumetric Analysis, W. S. Hendrixson Jan 1918

Further Work In Acid Potassium Phthalate As A Standard In Volumetric Analysis, W. S. Hendrixson

Proceedings of the Iowa Academy of Science

Nearly three years ago the writer showed that acid potassium and acid sodium phthalates may be used with advantage as standards in volumetric analysis. They can be easily prepared in a state of great purity, they have large molecular weights, and the acid potassium salt has the distinct advantage of absence of water of crystallization. So little work on these salts has been done and so limited is the knowledge of them that it was thought desirable to make further study of the properties and value as a standard of at any rate the potassium salt.

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Park Sites Along Des Moines Valley, James H. Lees Jan 1918

Park Sites Along Des Moines Valley, James H. Lees

Proceedings of the Iowa Academy of Science

At a time when the establishment of State parks is a prominent subject of discussion among lovers of nature and those who are interested in the conservation and improvement of our resources, both tangible and intangible, it is natural that attention be directed toward the central and chief watercourse of the state in the search for suitable sites for recreation centers. So the question arises as to the possibilities for locating parks, state, district or county, along the valley of Des Moines river. A number of years ago the writer enjoyed the opportunity of making a study of the physical …

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Note On The Tungsten X-Ray Spectrum (L-Series), O. B. Overn Jan 1918

Note On The Tungsten X-Ray Spectrum (L-Series), O. B. Overn

Proceedings of the Iowa Academy of Science

A rather incomplete report of the work of Dershem on the X-ray spectrum of tungsten has appeared in the proceedings of the Iowa Academy of Science, A complete report is to be found in the Physical Review of June, 1918, where he finds this spectrum to contain 19 lines in the L region. Further experiments have been carried on using the same apparatus and method as used by Dershem, but increasing the time of exposure, with the result that six new lines have been discovered.

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Perennial Mycelium Of Parasitic Fungi, L. H. Pammel Jan 1918

Perennial Mycelium Of Parasitic Fungi, L. H. Pammel

Proceedings of the Iowa Academy of Science

In an interesting and valuable article on the perennial mycelium of some of the species of Peronosporeae Dr. I. E. Melhus calls attention to the perennial mycelium of the following species: Phytophthora infestans, Phytophthora cactorum, Cystopus candidas, Plasmopara viticola, Plasmopara pygmaea, Plasmopara halstedii, Peronospora dipsaci, Peronospora schachtii, Peronospora alsinearum, Peronospora grisea, Peronospora effusa, Peronospora ficariae, Peronospora parasitica, Peronaspora viciae, Peronospora rumicis. In a review of this paper by the writer, attention was called to the perennial character of Plasmopara viticola in our Vitis vulpina.

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Iowa State Teachers College Program Of Recitations, Winter 1917-18, Iowa State Teachers College Jan 1918

Iowa State Teachers College Program Of Recitations, Winter 1917-18, 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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Table Of Contents Jan 1918

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

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Stroboscopic Velocities In The Tonoscope, H. R. Fossler, L. E. Dodd Jan 1918

Stroboscopic Velocities In The Tonoscope, H. R. Fossler, L. E. Dodd

Proceedings of the Iowa Academy of Science

The characteristic equation for stroboscopic velocity is v8 = (A-n/m B) D0 (see Proc. Iowa Acad. Sci., Vol. XXIV, 1917, p. 222), where v8 is the stroboscopic velocity, A the frequency of the stroboscopic figures, B the frequency of illumination, n/m a fraction at lowest terms, and D0 the distance of separation of the stroboscopic figures.

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A Preliminary List Of The Acarina Of Iowa, Albert Hartzell Jan 1918

A Preliminary List Of The Acarina Of Iowa, Albert Hartzell

Proceedings of the Iowa Academy of Science

In 1886, Professor Herbert Osborn and Professor L. M. Underwood published, in the "Canadian Entomologist," a preliminary list of the Acarina of North America. This list included 99 species in 28 genera. In 1907, Nathan Banks published his "Catalog of the Acarina, or Mites, of the United States," which includes about 450 species in 133 genera. This number probably represents less than one-third of our mite population.

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Provincial Unity Of Continental Interior Coal Fields, Charles Keyes Jan 1918

Provincial Unity Of Continental Interior Coal Fields, Charles Keyes

Proceedings of the Iowa Academy of Science

With their extreme simplicity of geological structure it seems almost incredible that the coal-fields of the Continental Interior should remain so long without even approximate correlation of their several parts. That the Arkansas district, the Western Interior area, the Eastern Interior field and the Michigan basin are essential parts of a single stratigraphic province there is now little reason to doubt. Recent regional planation manifestly separates a once continuous plate by removing the coal measures over the crests of broad gentle folds and preserving from the effects of erosion the deposits lying in the troughs.

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Cumulative Index, Volumes I To Xxv, 1887-1918 Jan 1918

Cumulative Index, Volumes I To Xxv, 1887-1918

Proceedings of the Iowa Academy of Science

No abstract provided.

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The White Waterlily Of Mcgregor, Iowa, Henry S. Conard Jan 1918

The White Waterlily Of Mcgregor, Iowa, Henry S. Conard

Proceedings of the Iowa Academy of Science

At the meeting of this Academy held in Grinnell one year ago I reported some observations upon the white waterlily of Clear Lake, Iowa. The present notes are made possible through the kindness of Mr. H. C. Daubenberger of McGregor, Iowa, who sent specimens to Grinnell from his home in the first week of August, 1917. The package contained four flowers, three leaves and a rhizome twenty-one inches long.

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A Variation In The Black Walnut, L. H. Pammel, Charlotte M. King Jan 1918

A Variation In The Black Walnut, L. H. Pammel, Charlotte M. King

Proceedings of the Iowa Academy of Science

Several years ago Professor A. B. Noble of the English Department of Iowa State College called my attention to a peculiar walnut which he thought might be hybrid between the butternut (Juglans cinerea) and the black walnut (Juglans nigra). He again called my attention to the same tree last fall, in October, 1917.

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Some Phenological Records Of Spring Flowering Plants Of Henry County, H. E. Jaques Jan 1918

Some Phenological Records Of Spring Flowering Plants Of Henry County, H. E. Jaques

Proceedings of the Iowa Academy of Science

For four years, a record has been kept of the date of the first flower to be found growing in open ground out of doors, of our native and introduced plants of Henry County. In practice nearly all of the specimens have come from in and around Mount Pleasant. Much of the collecting has been done by students in the college classes, the number employed each year ranging from fifteen to forty.

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A Study Of The Pollen And Pistils Of Apples In Relation To The Germination Of The Pollen, J. N. Martin, L. E. Yocum Jan 1918

A Study Of The Pollen And Pistils Of Apples In Relation To The Germination Of The Pollen, J. N. Martin, L. E. Yocum

Proceedings of the Iowa Academy of Science

The failure of a fruit tree to develop a normal amount of fruit may be due to a number of causes as stated by Kraus in volume VI of the Journal of Heredity. However, unless a plant develops fruit parthenocarpically, the development of fruit depends primarily upon how the pollen and pistil function relative to each other. As Kraus points out, fertilization by no means insures the development of a fruit, for very commonly the fruit does not develop despite the fact that normal fertilization occurred, but, on the other hand, in the absence of fertilization, fruit seldom develops among …

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Some Problems Of Water Supply For Troops, Jack J. Hinman Jr. Jan 1918

Some Problems Of Water Supply For Troops, Jack J. Hinman Jr.

Proceedings of the Iowa Academy of Science

The problems of water supply under field conditions are very different from those of the average city or town, even though the same fundamental principles apply to both. The city or town will in all probability make an extensive and careful survey of all water supply prospects and then choose that source which seems likely to offer the cheapest means of getting enough water that will be safe to use for drinking and other domestic purposes. Once the source is decided upon, expensive pumping and purification plants are erected and a complex distribution system is installed. A high degree of …

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The Occurrence And Possible Toxicity Of Molds In Corn Silage, Alvin R. Lamb Jan 1918

The Occurrence And Possible Toxicity Of Molds In Corn Silage, Alvin R. Lamb

Proceedings of the Iowa Academy of Science

Frequent cases of suspected forage poisoning in this state which apparently were traced to moldy silage, led to this study. The silage in a silo below the surface layer is almost always free from mold, at least when properly packed and containing a sufficient amount of moisture. Occasionally, however, clumps of mold are found far below the surface and in the interior of the mass where the amount of oxygen is almost negligible. In order.to secure a considerable number of samples of such moldy silage, notices were sent out to the newspapers of the state through the press bulletin, "Better …

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Milk As The Sole Diet Of Ruminants, A. C. Mccandlish Jan 1918

Milk As The Sole Diet Of Ruminants, A. C. Mccandlish

Proceedings of the Iowa Academy of Science

From time immemorial milk has been regarded as the food best adapted to the nourishing of mammalia. It is the sole diet of all mammals during the earlier part of their postnatal development and is also recognized as an excellent staple in the diet of the adult human, especially in the case of invalids. On the farm it is used extensively in the feeding of young animals and in the case of the hog it is fed in large quantities to more mature individuals.

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