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A Study Of The Stem Anatomy Of Aristolochia Sipho A., Rudolph F. Dobry

Bachelors’ Theses

Plant anatomy has been studied for over 265 years. The discovery of the plant cells by Robert Hooke in 1665m stimulated studies in regard to these structures.

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 …

The Development Of The Embryo Of Iris Missouriensis Nutt, C. Eugene Larsen

Theses and Dissertations

There is but a single species of Iris native to Utah. This is Iris missouriensis Nutt. This plant was chosen for investigation because of its possible significance and because material of this species was readily available. The embryo of Iris missouriensis Nutt. shows some resemblance to the Lily type in its development of an irregular dividing suspensor. It also resembles the Orchid type in the usual development of sixteen cells before the dermatogen is cut off. In general development, however, the writer believes it to have an embryo sequence more similar to the Alisma type than to the dexcriptions given …

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 …

The Effect Of Variation In The Calcium-To-Phosphorus Ratio On The Utilization Of Nitrogen, Calcium, And Phosphorus By The Growing Chick, C. W. Ackerson, M. J. Blish, F. E. Mussehl

Nebraska Agricultural Experiment Station: Historical Research Bulletins

1. Three groups totaling 123 chicks were fed accurately known amounts of rations containing 0.9, 1.5, and 2.3 per cent of calcium with liberal provision of the antirachitic factor so that conditions for assimilation and deposition were favorable. 2. By means of the comparative slaughter test the retention of ingested nitrogen was found to be about 37 per cent, and that of phosphorus about 28 per cent in the three lots. 3. With 0.9 per cent calcium in the ration, 35 per cent of that ingested was retained; at a level of 1.5 per cent calcium, 24 per cent was …

North And South Dakota Horticulture, May 1936, North And South Dakota Horticultural Societies

North and South Dakota Horticulture

Volume 9, Number 5

Swainson's Hawk, O.A. Stevens
N.D. News Letter, A.F. Yeager
Spring Bird Flight, Dr. Ferd. Brown
President's Corner, F.X. Wallner
Forestry Views, D.D. Baldwin
Shelterbelt in S.D., A.L. Ford
Secretary's Corner, W.A. Simmons
From our Mailbag, Victor Lundeen
Plant Peonies, A.M. Brand
My Philosophy, John S. Robertson
An Interesting Nebraska Orchard

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.

Viola Sagittata Ait., H. K. Svenson

Specimens by Name

No abstract provided.

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.

The Shelterbelt Project, J. M. Aikman

Journal of the Minnesota Academy of Science

No abstract provided.

Utilization Of Some Farm Wastes, Chas A. Mann

Journal of the Minnesota Academy of Science

No abstract provided.

Science And Rubber Trees, E. C. Stakman

Journal of the Minnesota Academy of Science

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.

Kentucky Warbler (Vol. 12, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

North And South Dakota Horticulture, April 1936, North And South Dakota Horticultural Societies

North and South Dakota Horticulture

Volume 9, Number 4

The Sparrow Hawk, O.A. Stevens
N.D. News Letter, A.F. Yeager
County Parks, H.E. Beebe
President's Corner, F.X. Wallner
Oriental Poppies, etc., A.L. Truax
Forestry Views, D.D. Baldwin
Fruits in Manitoba, Dr. W.R. Leslie
Secretary's Corner, W.A. Simmons
From Our Mailbag, Victor Lundeen
Vermillion Garden Club, Mrs. M.M. Saeger
Plans for Shelterbelt, F.E. Cobb
Welcome to the Crocus, Mrs. J.M. Allen

The Impact Of Meteors, John D. Boon

Field and Laboratory

Energy changes that occur when a meteor strikes the surface of the earth or the moon, are difficult to determine. The velocity of meteors is so much greater than that of molar masses with which we are familiar, such as projectiles of high powered rifles, that there is little basis for comparison.

Transportation Adjustments To Topography In Dallas, Texas, Edwin J. Foscue

Field and Laboratory

The outstanding physiographic feature of Dallas County is the White Rock Cuesta, which marks the western edge of the Austin Chalk limestone. Immediately below the chalk lies the easily eroded Eagle Ford Shale, hence the contact between the two strata is clearly marked by this westward facing cuesta, which extends from the southwest corner of the county to the middle northern border. The Trinity River, an antecedent stream, has cut a gap through the cuesta about midway between the northern and southern boundaries of the county…. The gap through the cuesta, and the narrowing of the Trinity River flood plain, …

Whole Issue Nebraska Bird Review (April 1936) 4(2)

Nebraska Bird Review

Contents

A Study of the Distribution, Migration and Hybridism of the Rose-breasted and Rocky Mountain Black-headed Grosbeaks in the Missouri Valley Region. By Myron H. Swenk .............27

General Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 41

Editorial Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . …

Ichthyc Oil, John A. Riddick

Field and Laboratory

In the vicinity of Seefeld, in the Austrian Tyrol at an altitude of 1,000 meters lies a rock formation known geologically as Seefeld shale. It is found in veins varying in thick ness from 20 cm. to 100 cm. Enveloping this shale is the Gall enstein formation containing many fossil gastropods. The occurrence of this particular mollusk in large quantities dates the formation as Silurian. The Seefeld formation is a specific bituminous shale which yields a crude oil from which Ichtyhol is made. Centuries ago, the Tyrolian peasants would collect this shale, boil it with water in large pots, and …

A Century Of Scientific Exploration In Texas Part 1: 1820-1880, S. W. Geiser

Field and Laboratory

Science evolves and is perfected by the patient and criti cal labors of generations of investigators; and scientific progress is marked by an unending series of publications. To this fact, indeed, is due the perennial interest of the History of Science…. Texas has an almost unique place in the history of scientific exploration. This is probably owing to a number of singular coincidences.

The Araneida Of Dallas County: Preliminary Note, Sarah E. Jones

Field and Laboratory

Little is known of the. Araneida of the Southwest. The Peckhams (1909) made an excellent report on the jumping spiders of Austin, Te:x:as, and vicinity. The report on "Oklahoma Spiders" by Banks, Newport, and Bird (1932) is also helpful. This is particularly true for the northern part of Texas, for many of our species are listed in that report. Other miscellaneous publications, such as those on new species by W. J. Gertsch (1932-33) have added to our knowledge of the spider-fauna of this section. The present report is an abstract of a preliminary survey of Dallas County Araneida. The work …

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.