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The Fertilization-Reaction In Echinarachnius Parma. Vi. The Necessity Of The Egg Cortex For Fertilization, E. E. Just

Department of Biology Faculty Publications

No abstract provided.

Some Field Instruments And Their Applications, G. W. Goldsmith

University Studies (University of Nebraska) (1888–1984)

Physiology and ecology depend for their constructive development largely upon the applications of physico-chemical concepts to living organisms and their environment, to their life processes, reactions, and interrelations. A concept is valuable biologically in so far as it can be applied and used as a tool for better understanding of the phenomena related to life. Ecology, as the study of the relations between organisms and their environment and of the interrelations of organisms, depends primarily upon the findings of physiology (Clements, 1905). But to apply physicochemical concepts and hence make them of value to the physiologist or ecologist commonly requires …

Initiation Of Development In The Egg Of Arbacia. Ii. Fertilization Of Eggs In Various Stages Of Artificially Induced Mitosis, E. E. Just

Faculty Reprints

No abstract provided.

Initiation Of Development In The Egg Of Arbacia. I. Effect Of Hypertonic Sea-Water In Producing Membrane Separation, Cleavage, And Top-Swimming Plutei, E. E. Just

Faculty Reprints

No abstract provided.

Initiation Of Development In The Egg Of Arbacia. I. Effect Of Hypertonic Sea-Water In Producing Membrane Separation, Cleavage, And Top-Swimming Plutei, E. E. Just

Department of Biology Faculty Publications

No abstract provided.

Initiation Of Development In The Egg Of Arbacia. Ii. Fertilization Of Eggs In Various Stages Of Artificially Induced Mitosis, E. E. Just

Department of Biology Faculty Publications

No abstract provided.

The Taxonomy Of The Masarid Wasps, Including A Monograph On The North American Species, James Chester Bradley

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No abstract provided.

Renovation And Remodeling, Azalea Linfield

SDSU Extension Circulars

Next to food economy, the housewife will find her largest savings in the family clothing. The price of clothing steadily advanced throughout the war period and even now after three years the prices are still beyond the means of a great many of us. The normal conditions of the textile supply cannot be restored for years. In order to save textiles and correct all habits of wastefulness, study the possibilities of partly worn garments and do not discard them. Frequently touches of embroidery, braid, rows of buttons or other means of simply trimming can be used to cover up defect …

Iii. The Predaceous Enemies Of Ants, Joseph Bequaert

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The various means by which Nature prevents an excessive increase of the species not only forms in itself an interesting chapter of ecology, but its study is also of great importance in an understanding of the true meaning of Natural Selection. In the case of ants it has been contended that they are better defended than other insects against the attacks of predatory animals. Poulton evidently takes this for granted when he considers that ants, together with wasps, are among the favorite models for "mimicking" insects and other arthropods. These ant-like arthropods, having acquired by Natural Selection their resemblance "to …

Vegetable Storage, A. L. Ford

SDSU Extension Circulars

You have raised your garden and have done well. You have had fresh vegetables to eat all summer and now you must look forward to the winter months, in other words, you must store the root crops, the pumpkins, cabbage, etc., so you will have the supply to draw on nearly all winter. We are sending you with this month’s lesson two excellent bulletins on vegetable storage. We want you to read and study these for there is lots of information in them that you should know.

The Fertilization-Reaction In Echinarachnius Parma. V. The Existence In The Inseminated Egg Of A Period Of Special Susceptibility To Hypotonic Sea-Water, E. E. Just

Faculty Reprints

No abstract provided.

The Fertilization-Reaction In Echinarachnius Parma. V. The Existence In The Inseminated Egg Of A Period Of Special Susceptibility To Hypotonic Sea-Water, E. E. Just

Department of Biology Faculty Publications

No abstract provided.

Bulletin No. 182 - The Net Duty Of Water In Sevier Valley, Orson W. Israelsen, Luther M. Winsor

UAES Bulletins

The Sevier River is one of the most important sources of irrigation water in Utah. It rises in two main branches. The south fork rises in Kane County and flows almost due north to Junction in Piute County, where it joins the east fork, which rises partly in Garfield County and partly in Sevier County. The Garfield County branch of the east fork flows north, and the Sevier County Branch flows south to Coyote where the two tributaries join and flow westward into Junction. From Junction, the river flows northward past Marysvale, Sevier, Richfield, Salina, Gunnison, and Mills, where it …

Garden Pests And Diseases, A. L. Ford

SDSU Extension Circulars

There are hundreds of species of insects and hundreds of different plant diseases that attack our garden crops here in South Dakota. They are always in danger from these. This being the case there is but one thing for each garden club member to do and that is to learn the best way to get rid of the pest before the pest comes. If you’ll do that you will always be ready and the boy or girl who is ready in a case like this is going to win out.

Corn Investigations, T. A. Kiesselbach

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The purpose of the investigations reported in this bulletin has been primarily to determine some of the underlying principles involved in corn improvement. The work comprises a study of some of the physiological characteristics of the crop together with a comparison of various selection, breeding, and cultural practices in their relation to grain yield.

Variations In Cytolgoy And Gross Morphology Of Taraxacum, I. Cytology Of Taraxacum Laevigatum, Paul B. Sears

Papers in Ecology

These investigations are the outgrowth of a study, begun in 1914 at the instance of the late Professor C. E. Bessey, of parthenogenesis in Taraxacum vulgare (Lam.) Schrk. and T. laevigatum ( Willd.) DC. These two species are the common ones in central United States, being respectively designated as Leontodon taraxacum L. and L. erythrospermum (Andrz.) by Britton and Brown (3). In 1917 the existence of ameiotic parthenogenesis in both species was confirmed (23) and certain pollen abnormalities briefly described. These abnormalities have invited more critical analysis as a means of throwing light upon certain phases of variation …

Grasshoppers, Cutworms And Army Worms And Their Control By Poisoned Bran Mash, A. L. Ford

SDSU Extension Circulars

Were it possible to accurately estimate in dollars and cents the average annual loss caused by grasshoppers, cutworms, and army worms to the growing crops of South Dakota, the figure arrived at would be a staggering one. These three pests cause a greater average annual damage than any other three insect pests in the state. Natural conditions here are such that we may expect outbreaks from any of these three in any part of the state for many years to come. Being situated in this manner, it behooves every farmer in South Dakota to be prepared to fight these pests …

Kimono Dress, Azalea Linfield

SDSU Extension Circulars

This circular, created by the Agricultural Extension Service at South Dakota State College, provides information in regards to the extension of clothing techniques in the Home Economics Department during 1922.

Blouse, Azalea Linfield

SDSU Extension Circulars

This circular, created by the Agricultural Extension Service at South Dakota State College, addresses the clothing article of the blouse and how one can create this article of clothing. This is taught through the Home Economics department during the year 1922.

Life-History Of Melittobia Acasta, L. Balfour Browne

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No abstract provided.

Genetic Interrelations Of Two Andromonoecious Types Of Maize, Dwarf And Anther Ear, R. A. Emerson, Sterling H. Emerson

Department of Agronomy and Horticulture: Faculty Publications

Attention was called by Montgomery (1906)to the occasional appearance

of perfect flowers in the staminate inflorescence of maize and similar

cases were reported by Kempton (1913). Montgomery (1911) described

with illustrations a true-breeding type of semi-dwarf dent maize, the ears

of which were perfect-flowered. Perfect-flowered maize was described

and illustrated also by Blaringhem (1908, pp. 180-183). East and

Hayes (1911, pp. 13, 14) noted and illustrated a perfect-flowered sweet

corn. Weatherwax (1916, 1917) showed that typically pistillate

flowers of maize exhibit in microscopic sections the rudiments of stamens

and that staminate flowers show rudiments of pistils.

The Physiology Of The Respiration Of Fishes In Relation To The Hydrogen Ion Concentration Of The Medium, Edwin B. Powers

Papers in Systematics and Biological Diversity

Within recent years much has been added to the knowledge concerning the mechanism of the respiratory function of the blood. Haldane and Priestley (1905) have shown that, at least in the higher animals, the respiratory movements are affected by the carbon dioxide tension of the arterial blood. It has been shown definitely (Hasselbalch, 1912 and citations) that the exciting agent is the hydrogen ion concentration of the blood bathing the respiratory center.

Krogh and Leitch (1919) undertook to study the respiratory function of the blood of fishes in view of the knowledge of the influence of temperature upon the dissociation …

Circular No. 46 - Thirty Years Of Agricultural Experiments In Utah, F. S. Harris, N. I. Butt

UAES Circulars

The Utah Agricultural Experiment Station has been established over thirty years. During this time more than a hundred experimenters have worked on the staff, each one contributing something to aid in the researches that have been conducted. During the first few years regular annual reports were published, but during recent years no such reports have been issued. The results of the work of the Station have been published in station bulletins and circulars and in various technical journals.

Since there is no publication or series of publications that records all the activities of the Station it was thought desirable at …

Freezing Injury Of Seed Corn, Theodore A. Kiesselbach, J. A. Ratcliff

University of Nebraska-Lincoln Extension: Historical Materials

Research Bulletin No. 16
The University of Nebraska Bulletin of the Agricultural Experiment Station of Nebraska

Summary • Introduction • Character of corn embryo and process of germination • Freezing injury not due to arrested development of the embryo • Moisture content of corn • Old corn • New corn • Physical effects of freezing • Ice formation in kernels • Effect of freezing on color of embryo • Effect of freezing on embryonic tissues • Chemical effects of freezing • Probable cause of death from freezing • Historical review • Crushing of plant tissues or rupturing of cell structures …

Freezing Injury Of Seed Corn, T. A. Kiesselbach, J. A. Ratcliff

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The object of the investigations in this bulletin has been to determine the conditions under which freezing injury may occur to seed corn; to indicate, if possible, the vital changes in the embryo resulting in such injury; and to point out ways by which seed corn of strong vitality and satisfactory yielding capacity may be obtained.

Bulletin No. 174 - A Variety Survey And Descriptive Key Of Small Grains In Utah, George Stewart

UAES Bulletins

Standardization of the varieties of small-grains in Utah is highly important. A mixed condition of grain causes both direct loss and inconvenience. The loss comes about in two principal ways: (1) by the decreased yields resulting from mixed grain, and (2) by the lower price paid for each bushel of mixed grain. This latter loss is especially noticeable in wheat on account of the grading system which penalizes mixed wheat by reducing the grade or by barring it from one of the six market classes and designating it as "mixed" wheat. The inconvenience arises from the fact that some varieties …

Potato Seed Certification In South Dakota, Frank E. Mccall

SDSU Extension Circulars

The introduction of dangerous potato diseases, (notably powdery scab and black wart) along with Federal grade regulations and the demands of many states that potatoes for propagating purposes be certified—as to purity and freedom from diseases—has aroused unusual interest in the standardization of potato shipments from the various northern potato growing centers. Early in 1919, the potato growers of the state felt an urgent need for definite lines of potato improvement. Accordingly, a plan for inspection and certification of potato seed stock was inaugurated. This move was entirely voluntary on the part of the·potato growers and was placed under the …

A Suggested Farm Entrance Sign For Advertising Purposes, Ralph L. Patty, Geo A. Starring

SDSU Extension Circulars

With the great increase in the number of farmers who are adopting names for their farmsteads, there is an accompanying desire for the erection of appropriate sign boards, entrance signs, or other devices of advertising value. The accompanying sketch and working plan are intended to show what may be done with ordinary building materials in erecting a sign that has good lines. Farmers who contemplate the putting up of two posts and a straight cross board may find in this suggestion something worthwhile. If the sign is worth erecting at all, why not put up one that is attractive? Many …

Bulletin No. 171 - Alfalfa Seed Growing And The Weather: With Particular Reference To Conditions In Utah, J. Cecil Alter

UAES Bulletins

The demand for alfalfa seed has far outrun domestic production. Since the labor and expense of producing the crop are light, and the profits attractive in favorable years, a desire is manifest wherever alfalfa is grown, to save a crop for seed whenever the meteorological elements favor its setting and maturing. Climate is generally acknowledged to be the limiting factor in alfalfa seed production, and the current weather the major factor affecting the yearly yields.

The Community Meat Ring, John M. Brander

SDSU Extension Circulars

"Fresh meat regularly and at reasonable prices” is what a rural community in Douglas county has adopted as its slogan. To have fresh meat whenever desired from farm butchered livestock is too often considered practically impossible on account of the rather limited amount of fresh meat that a family could use before the meat spoils. To get it regularly from a butcher shop involves added time in addition to the fact that very high prices are charged. The salting, curing, smoking, and other methods of meat preservation are practiced to a certain extent by farmers throughout the country, but supplies …