Life Sciences Commons^™

A Study Of A Heron Nesting Colony, Linden J. Leatham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Herons are well known because of their gregarious nesting habits. Like many others of the lower orders of birds they nest together in pure or mixed colonies of many different combinations and under diverse living conditions. The population of different colonies may vary from a few pairs to many thousands of pairs depending upon the nature and extent of the breeding area, the food supply available and the protection afforded either by natural or artificial means.

In Utah and adjacent areas of bordering states, many types of heron associations have been studied and reported by ornithological workers. Breeding colonies of …

Ec1507 Revised 1947 New Insecticides For The Control Of Grasshoppers, Ephriam Hixson

University of Nebraska-Lincoln Extension: Historical Materials

Extension circular 1507 Revised 1947 discusses new insecticides for the control of grasshoppers.

Mammals Of Utah County, James W. Bee

Student Works

Based on the premises that an accurate determination and description of the mammals of Utah County is a prerequisite for subsequent research in ecology, geographic distribution and evolutionary taxonomy, this thesis is submitted. While it is essentially taxonomic, there are included related subjects to permit a more thorough interpretation of the subject as a whole.

Summarizing, the objectives are:

• a. To list and key the known mammals of Utah County with descriptions and measurements.
• b. To ascertain their geographic range within the county.
• c. To present significant ecological and geological data for the proper appreciation of the problems of evolutionary …

An Adaptation Of The Feulgen Reaction For The Staining Of The Salivary Gland Chromosomes Of Drosophila, Herman C. Inlow

Bachelors’ Theses

The discovering of the genetic value of Drosophila salivary gland chromosomes by Painter, Heitz, and Bauer in 1934 posed a problem of technique to the microtomist that is still being improved upon and widened. The staining of these chromosomes fer better study and to determine their properties, both chemical and physical, has been the object of intense research. This paper is the result of my work in connection with this subject.

Membership Relations Of The Utah Poultry And Farmers' Cooperative, Glen T. Nelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Commercial egg production in Utah has developed gradually since 1920. Production of eggs increased from 142 million in 1924 to 433 million eggs in 1946. The percentage of total farm income of the state derived from the poultry industry increased from 5.3 percent in 1924 to 23.1 percent in 1946 and at the present time constitutes the largest income of any farm enterprise in this area. Factors influencing this development are: 1. High prices resulting from the war period of 1917 to 1920 followed by the depression period when prices were low. 2. The organization of cooperative egg-marketing associations. 3. …

A Taxonomic Study Of The Scolytidae (Coleoptera) Of The Logan Canyon Area Of Utah, Stephen L. Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In spite of the great economic importance of north American Scolytidae, many taxonomic descriptions remain inadequate for the identification of species, and existing keys have been made obsolete by the recent description of new species. To bring these keys up to date and make them useful to students and practical foresters, detailed studies of the morphological structure of the various species are necessary. The purpose of the present investigation has been to clarify and revise existing keys and to describe briefly the species of Scolytidae occurring in the Logan Canyon area of Utah. The following keys and descriptions will be …

A Taxonomic Study Of The Adult Mosquitoes Of Utah County With Notes On The Biology And Distribution Of The More Common Species 1946-1947, Cluff E. Hopla

Theses and Dissertations

In Utah County, information has been lacking concerning the taxonomy and distribution of mosquitoes. With the knowledge of this condition, it is felt that information can be presented which will be of value both to the scienoe of Entomology and the area concerned.

The Cost Of Producing Eggs And The Egg Feed Ratio In Utah 1929-'46, Emer E. Broadbent

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Commercial egg production in Utah has developed largely since 1920. Prior to that time most farms had some chickens but the eggs were either used at home or consumed on the local markets. What few commercial poultry farms there were also supplied local markets. It has been estimated that the total egg production in the stat was just about equal to the consumption within the state. Soon after1920 however, egg production on a commercial basis began and thereafter expanded rapidly for a time.

The Measurement Of Agricultural Production In The Utah From 1920 To 1946, Owen L. Brough Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As agricultural leaders become increasingly aware of the economics involved in the production and marketing of agricultural products, there develops an increased need for more accurate and more complete methods of measuring agricultural production. This need is not only for the satisfactory measurement of the physical production of a given crop, but is also for a unit of measurement that will make possible a comparison of the production of individual enterprises and groups of enterprises for a given year and from year to year. Because the production of many crops, and livestock and livestock products are customarily measured according to …

Variable Factors In The Determination Of Fat And Moisture In Cheddar Cheese, William C. Winder

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The rapid growth of the dairy industry which began in the latter half of the nineteenth century necessitated the development of chemical tests for determining the composition of dairy products. Chemists devoted much study and labor in devising methods which would be both accurate and rapid. As a result of these researches a large number of tests were developed. Many of the methods possessed considerable merit and a few were so satisfactory that the rest did not come into general use. The basic principles of all the tests now in use were discovered between 1880 and 1890.

Viola Rafinesquii Greene, Hiram F. Thut

Specimens by Name

No abstract provided.

The Future Of Utah's Agriculture, W. Preston Thomas

Faculty Honor Lectures

Since the settlement of the state Utah's agriculture has been based primarily on irrigated farming. The major part of farm income and the livelihood of farmers and farm families comes from this type of farming. Also, Utah's hopes for agricultural expansion and development, the adding of new wealth, and the providing of employment for Utah rural people, lie in a further development of irrigation and irrigated farming. Range livestock and dry farming, when measured by income and employment of labor have been, and are likely to remain, minor enterprises when compared to irrigated farming. In this discussion of Utah's agriculture …

The Fifty-Ninth Session Of The Iowa Academy Of Science And The Fourteenth Convention Of The Junior Academy Of Science Of Iowa, April 18 And 19, 1947, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

Kentucky Warbler (Vol. 23, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

North And South Dakota Horticulture, April 1947, North And South Dakota State Horticultural Societies

North and South Dakota Horticulture

Volume 20, Number 4

The American Golden-eye, O.A. Stevens
Newslants, H.A. Graves
Garden Notes, W.E.H. Porter
Manitoba News Letter, W.R. Leslie
Garden Club Gleanings, Mrs. G.M. Jorgensen
Trout Fishing, An Art, H.R. Woodward
Book Reviews, Mrs. Morris Harter
Iris Notes, Rev. E.L. Jackson
Beebe's Philosophy, H.E. Beebe
Early Summer in Dakota, Dr. Geo. F. Will
Secretary's Corner, W.A. Simmons
Blizzard Belt Gardener, Florence F. Hoier
Controlling Weeds With Chemicals, Dr. S.A. McCrory

Block And Bridle Annual 1947

Block and Bridle Annual (1933–2021)

After being inactive for three years because of the War, the Nebraska chapter of Block and Bridle was reactivated on April 22, 1946.

Ec1549 External Parasites Of Chickens And Ddt, Ephriam Hixson, Martin H. Muma

University of Nebraska-Lincoln Extension: Historical Materials

Extension circular 1549 discusses external parasites of chickens and DDT.

Medical Arts & Sciences, Volume 1, Number 1, April 1947

Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists

No abstract provided.

A New Surgical Approach For Vagotomy, Diaphragmatic Herniotomy, Splenectomy, And Operations Upon The Gastro-Esophageal Area Through The Left Sub-Diaphragmatic Extraperitoneal Space, H. A. Davis

Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists

No abstract provided.

Cerebral Anoxia And Its Residuals: I. Historical Introduction, Cyril B. Courville

Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists

No abstract provided.

The Circulatory Effects Of Histamine, Fred B. Moor

Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists

No abstract provided.

Intracranial Surgery, William T. Grant

Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists

No abstract provided.

Suggestions For The Handling Of Certain Mammals, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

For experimental work, it is often desirable to handle the smaller wild mammals more freely than usual methods allow. Howell (Journal of Mammalogy (1937) 18(4): 513) suggests the feeding of pentobarbital sodium in milk or other food. While this may be satisfactory for animals accustomed to captivity, it can hardly be used for those newly captured.

Trout Foods In Gilmore Valley Creek, Winona County, Minnesota, L. George

Journal of the Minnesota Academy of Science

No abstract provided.

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

Back Matter

Journal of the Minnesota Academy of Science

No abstract provided.

A Method Of Measuring Vigor Of Range Grasses, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

After several years of intensive study of midwestern prairies, their degeneration under grazing was given careful consideration (Weaver and Fitzpatrick, '32, '34; Weaver and Hansen, '41). It was ascertained that the intelligent use or careless abuse of these grasslands had resulted in pastures and ranges which could logically be grouped into four classes. These were excellent, good, medium, and poor. The first consisted almost entirely of climax grasses and an abundance of nutritious forbs which, as is almost universally found, were of the highest grazing value (Bews, '29: 298). In good pastures many of these persisted, but there was a …

Pullorum Disease In The Coot, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Among specimens collected on March 8, 1945, at Buckeye Lake, Ohio, were a number of coots (Fulica americana). When the latter were examined for parasitic infection, it was noticed that the ovary of one specimen was deformed, and much enlarged when compared with those of other birds of this species collected on the same day. No other lesions were detected macroscopically, and the bird appeared to be in normal physical condition. The ovaries resembled those found in chickens affected with pullorum disease, and a pure culture of Salmonella pullorum was recovered.