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A Further Study Of Utah Asilidae, D. Elmer Johnson

Theses and Dissertations

This study is based on a similar study made by Claudeous J. D. Brown in 1928, and published in 1929. The species he used have been rechecked, and additional ones have been studied. The species considered in this study represent three of the four subfamilies of North American Asilidae. These three subfamilies are Dasypogoninae, Laphriinae, and Asilinae. This study is limited to those species in the Brigham Young University Collections, and to species recorded in print. No claim is here made that all the forms inhabiting the state have been discovered, in fact the writer is well aware of the …

Nervous System Of Felis Domestica, Rachel Creighton Mcavoy

Biology Honors Papers

This 34 page thesis examines the embryology, anatomy and histology of the nervous system of Felis domestica.

The Flora Of The Tasco Lake Region, Sheridan County, Kansas, Raymond W. Darland

Master's Theses or Doctor of Nursing Practice

It has been customary in writing theses dealing with taxonomic problems to collect data from an entire county. Having had occasion to collect botanical specimens from the Tasco Lake for work in biology at the Sheridan High School, the wealth of plant life to be found here became apparent. The area ranges from xerophytic forms on the uplands to the hydrophytic forms in the lake and marshes. Many of the latter have never been reported from Western Kansas. Collections in preserving fluid were made of the water forms found and specimens of the landforms were mounted on regulation-sized sheets properly …

A Study Of Some Phases Of The Gametophyte Of Preissia Commutata Nees, Marion Steuber

Bachelors’ Theses

The beginnings of the exact knowledge of the Hepaticae dates from the work of Hofmeister, who in 1350 to 1362 published important investigations on them. He discovered the egg cell in the archegonium, traced the sperm to the surface of the egg and showed that it was fertilized by the sperm.

Spermatogenesis Of The Albino Rat (Nus Norvegicus Albus), Norman A. Frankenstein

Bachelors’ Theses

This thesis deals with the inquiry opened by the fundamental discovery that the gamete nuclei, and hence, the two parents from which they are respectively derived, con­ tribute each a haploid or single group of chromosomes to the fertilized egg. Each act of fertilization doubles the gametic number of chromosomes; yet the number of characteristic of the species remains constant from generation to generation. Somewhere in the life cycle, accordingly, the diploid or somatic number must be reduced by one-half to the haploid or gametic number. The first explanation was that reduction took place by some process of degeneration or …

Types Of Vascular Arrangement In Some Homosporous Leptosporangiate Ferns, Grace Ann Kreuz

Bachelors’ Theses

The vascular structure of Leptosporangiate and Eusporangiate ferns has been studied by a number of Botanists.

Histological Study Of The Structure Of The Testis Of Rana Pipiens, John L. Friedl

Bachelors’ Theses

All the living organisms, be they plant or animal, act as a unit which implies that the various anatomical and physiological systems are coordinated either for the benefit of the Individual itself or for the maintenance of the spe­cies. For convenience sake, the individual is divided into a digestive,. respiratory, circulatory, nervous, muscular, and skeletal systems; but there is one system which although of some value to the individual is primarily adapted for the production of other individuals, and this is the reproductive system.

Front Matter

Journal of the Minnesota Academy of Science

The 4th Annual Meeting of The Minnesota Academy of Science.

Fiftieth Annual Meeting Of The Iowa Academy Of Science And The Fifth Annual Convention Of The Junior Academy Of Science Of Iowa, April 3 And 4, 1936, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Bulletin No. 266 - Comparative Size Of Rural And Urban Utah School Children As Determined By The Weight - Height - Age Relationship, Almeda P. Brown

UAES Bulletins

The problem investigated was as to whether significant differences occur in size of rural and urban Utah school children. Through cooperation of school officials weight-height-age measurements were secured for the following groups of children from 6 to 15 years of age.

Alumni Notes

Field and Laboratory

No abstract provided.

Rhythm In Blossoming, C. O. Rosendahl, A. O. Dahl

Journal of the Minnesota Academy of Science

No abstract provided.

Back Matter

Journal of the Minnesota Academy of Science

No abstract provided.

The Growth And Development Of Gemmae Of Marchantia Polymorpha L., Theodore F. Van Aacken

Bachelors’ Theses

Marchantia was discovered and studied around the middle of the seventeenth century. It was named Marchantia in 1683 by Jean Marchant in memory of his father. Later when Linnaeus completed his great work, Das Pflanzenreich (1786), he named the plant Marchantia polymorpha.

The Anatomy Of The Oyster, M.J. Rohlinger

Bachelors’ Theses

The phylum Mollusca manifests the following characteristics: bilateral symmetry; three primary germ layers; free-living and sessile; marine and fresh-water; a shell modified to form either a bivalve or a univalve which gives an appearance of segmentation due to rings of growth or arrangement of certain parts of the shell as is seen in the class Amphineura, this is only apparent metamerism because the Mollusca are considered to be unsegmented animals; a coelom poorly developed; a foot; a mantle cavity; well developed digestive, circulatory, excretory, and reproductive systems. When one inspects a Chiton, an oyster, a snail, an octopus, or a …

Topographical Anatomy Of Ostrea Virginica, Harry J. Barnett

Bachelors’ Theses

The oyster is important for at least three reasons. First, it is important to the zoologist; second, it is a food which has developed million dollar enterprises; and third, the oyster is a domestic resource for the pearl and its allied industries. The oyster is a bivalve Mollusk, having symmetry in the larval stage but losing it in the adult stage. It has one large adductor muscle, somewhat posterior from the ligament which holds both valves together. The left valve forms a deeper pit than the right one as it is in the left valve that the oyster lies. It …

In Praise Of Parasitism, E. M. Freeman

Journal of the Minnesota Academy of Science

No abstract provided.

Nutritional Studies Of Protozoa, Alfred M. Elliott

Journal of the Minnesota Academy of Science

No abstract provided.

A Comparative Study Of The Origin And The Cytological Development Of Some Legume Nodules, Fred W. Bieberdorf

Journal of the Minnesota Academy of Science

No abstract provided.

Drought Resistance Of Green Ash As Affected By Geographic Origin, L. J. Meuli

Journal of the Minnesota Academy of Science

No abstract provided.

Back Matter

Journal of the Minnesota Academy of Science

No abstract provided.

Whole Issue Nebraska Bird Review (January 1936) 4(1)

Nebraska Bird Review

Contents

Our Bird Neighbors. By Dr. Solon R. Towne ... 3

General Notes ... 7

Editorial Page ... 11

The 1935 Migration Season ... 18

Christmas and New Year's Day Censuses ... 19

Here and There with the N.O.U. Members ... 22

In Memoriam ... 28

Announcement ... 28

Advertisement ... 24

Palaeontologic And Geologic Consideration Of Early Man In Nebraska, Erwin Hinckley Barbour, C. Bertrand Schultz

Bulletin of the University of Nebraska State Museum (1924–2023)

There has been much discussion recently relative to the geologic age of Yuma and Folsom artifacts. The writers submit the following palaeontological and geological data which may aid in a better interpretation of the subject. This paper deals with three localities in Nebraska where Yuma and Folsom implements have been found with extinct mammals; namely, the Scottsbluff Bison Quarry, the Sand Hill blow-out sites, and the Sioux County artifact sites.

Relative Efficiency Of Roots And Tops Of Plants In Protecting . The Soil From Erosion, Joseph Kramer, J. E. Weaver

Papers of John E. Weaver (1884–1956)

An increasing realization of the importance of preventing or controlling soil erosion has resulted in numerous scientific investigations. Some of these are concerned with soil characteristics which promote or retard erosivity (Middleton, '30; Middleton et al., '34; Lutz, '34; and Bouyoucos, '35). Many have to do with engineering methods of reducing soil wastage (Bates and Zeasman, '30; Ramser, '30; Roe, '33; and Bartel, '35). But perhaps most were planned to discover the effects of plants in protecting and binding the soil, reducing runoff, and consequent loss of soil and subsoil (Sampson and Weyl, '18; Duley and Miller, '23; Lowdermilk, …

The Distribution Of Anopheles, Their Wintering Activities, And Breeding Places In Bernalillo And Valencia Counties, New Mexico, Bright Elsworth Grenier

Biology ETDs

An impetus was given to the study of the Culicinae by the discovery of Sir Ronald Ross in 1898 that some mosquitoes are the vectors of the malarial parasites. A large amount of work has been done with the species belonging to the tribe Anophelini and it has been learned that vectors of the malarial parasites of human beings belong to this tribe.

A Preliminary Study Of The Mountain Lion (Felis Cougar), Frank C. Hibben

Biology ETDs

During one year's time from October 1934 and extending over into September 1935, an investigator was placed in the field to make a special study of the mountain lion. The agency which was so interested was the Southwestern Conservation League which had received funds from private sources for the purpose of the investigation. The scientific aspects of the project were carried on under the auspices of the Biology Department of the University of New Mexico, The New Mexico Game Department and the United State Biological Survey also helped and fostered the investigation by supplying the means through their separate agencies, …

Quantitative Studies On The Relation Of Soil Texture, Moisture Content, Hydrogen-Ion Concentration, And Soluble Salts On Vegetation In The Albuquerque Division Of The Rio Grande Conservancy District, Marvin D. Rohovec

Biology ETDs

The middle Rio Grande Conservancy District was established in 1926, and occupies a portion of the Middle Rio Grande Valley one hundred and twenty-five miles in length and averages three and six tenths miles in width. It extends from White Rock Canyon, fifty miles north of Albuquerque, to the north of line of the Bosque del Apache Grant, fifteen miles south of Socorro. This area, which lies in Sandoval, Bernalillo, Valencia, and Socorro Counties, has an altitude ranging from 4500 feet to 5500 feet. A general arid condition exists in the area with an average precipitation of about eight inches …

Notes On The Life Habits Of The Silky Pocket Mouse (Perognathus Flavus Baird), Garth Blakely

Biology ETDs

The observations reported in this paper cover a period of six months' collection and study, lasting from November 1935 until April 1936, inclusive. While this report is not to be considered as a complete account of the life habits of Perognathus and while there are certain phases which have not yet been determined, it is hoped that the observations recorded here will constitute a useful contribution to the knowledge of the life history of this species.

The Abortion Of Essential Organs In The Imperfect Flowers Of Benzoin Aestivale, Norris M. Paulson

Electronic Theses and Dissertations

There have been a number of investigations dealing with the abortion of essential organs in the imperfect flowers. Ulvin submitted a paper on Abortive Stamens and Carpels in Lychnis alba, Simon described stamen and carpel abortion in Cucumis stativus, Schaffner was able to control sex expression in Arisamea triphyllum and secure sex reversal in Cannabis stiva, Bessey determined the relationship of sex to the age of pollen in Cannabis sativa.

Front Matter

Journal of the Minnesota Academy of Science

Proceedings of The Minnesota Academy of Science. Volume 4. 1936.