Life Sciences Commons^™

Pork Production, W. P. Snyder, E. A. Burnett

University of Nebraska-Lincoln Extension: Historical Materials

This is the "Limited Edition" long version.
Contents:

Introduction

Part I. Wintering brood sows:
Experiment 30. Wintering old brood sows
Table 1.-Wintering old brood sows. Record of four winters 1910-1914
Experiment 31. Wintering young brood sows
Table 2.-Wintering young brood sows. Record of five winters 1909-1914

Part II. Cost of the 50-pound pig
Experiment 32. Pigs from old sows
Table 3.-Cost of feed for producing a 50-pound pig from old sows.
Four years' record-1910-1913
Experiment 33. Pigs from young sows
Table 4.--Cost of feed for producing a 50-pound pig from young sows. Four years' record-1910-1913
Experiment 34. Fall pigs. Costs …

Soy Beans And Cowpeas, Theodore A. Kiesselbach

University of Nebraska-Lincoln Extension: Historical Materials

In recent years considerable interest has been manifest in Nebraska concerning soy beans and cowpeas; and numerous inquiries regarding them have come to the Experiment Station. The cowpea is regarded as a profitable crop chiefly in the cotton states, but has some importance as far north as Missouri, Illinois, Indiana, and Ohio. On the other hand, the soy bean is adapted primarily to the Northern States between the regions best suited for cowpeas in the South and Canada field peas in the North. The Central States in which they are most commonly grown are Illinois, Indiana, Ohio, and Michigan, and …

A Handbook Of Nebraska Grasses : With Illustrated Keys For Their Identification, Together With A General Account Of Their Structure And Economic Importance, E. Mead Wilcox, George K. K. Link, Venus W. Pool

University of Nebraska-Lincoln Extension: Historical Materials

The true grasses belong to the one family Poaceae, often called Gramineae, and constitute a very well defined natural group of plants. This family comprises upward of 3,000 species distributed among almost 300 genera. From the economic point of view the family is of supreme importance thru the fact that here belong the cereals, which supply a large part of the food of man, and the forage grasses which are so important as feed for our domesticated animals.

The genera and species are for the most part separated by artificial characters—a fact which renders their study and identification extremely difficult …

Otacariasis In The Bighorn, Henry Baldwin Ward

Harold W. Manter Laboratory of Parasitology: Library Materials

Summary

The ear of a mountain sheep at Estes Park, Colorado, USA, was found to be heavily infested with a Sarcoptid mite which was not the common scab mite of domesticated sheep but is new in this country.

This form is similar to a mite found in the ear of goats in the Pyrenees and in the Congo. Nevertheless there is reason to consider it a new species and it is named Psoroptes cervinae.

The complaint to which it gives rise is likely to be serious if its effects are like those of the related European form. The Bighorn …

The Habits, Life History, And Structure Of A Blood-Sucking Muscid Larva (Protocalliphora Azurea), Albert Francis Coutant

Harold W. Manter Laboratory of Parasitology: Library Materials

While studying the blood parasites Halteridium and Proteosoma, and the Filaria of the common crow (Corvus americana), my attention was attracted by an external parasite of some young nestlings which were brought into the laboratory. Observations on this parasite, which proved to be the larva of Protocalliphora azurea (Fall.), form the basis of this paper. The parasite is the immature form of one of the so-called "blue-bottle" or flesh-flies, whose larvae are generally regarded as useful scavengers. More careful observations on the life-histories of many species, however, have shown that they may be, and often are, parasites …

Natural Reforestation In The Mountains Of Northern Idaho, Harry B. Humphrey, John Ernst Weaver

Papers of John E. Weaver (1884–1956)

The factors affecting the natural reforestation of a fire-denuded area may, in general, be said to be the same in Idaho and Oregon as in Maine or Minnesota. There may be and actually are differences in detail as to what species of herbaceous and shrubby plants may prepare the way for the more delicate seedlings of those trees native to the particular locality. But the principle prevails everywhere that certain plants or plant societies. are antecedent and probably essential to the appearance and permanent establishment of a forest. The first step in the reforestation of a fire-swept area is the …

A Study Of The Root-Systems Of Prairie Plants Of Southeastern Washington, John Ernest Weaver

Papers of John E. Weaver (1884–1956)

While carrying on a study of the plant formations and associations of semi-arid southeastern Washington in 1912-1914, it soon became apparent that for a proper understanding of the development and structure of these associations a knowledge of the root-systems of the more important prairie species was imperative. Consequently, during the fall, winter, and spring of 1913--1914, more than 350 root-systems of 25 of the most important ecological species were examined. This paper contains descriptions of these, together with a discussion of the conditions under which the plants grow.

The prairies of southeastern Washington, and their eastward extension into adjacent Idaho, …

Researches In The Genus Taraxacum, Paul B. Sears

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

These researches were undertaken with a view to working out certain little known phases of the life history of our local species of dandelion, and particularly with a view to confirming or disproving the following widely accepted conjecture of Raunkjiaer;

"Species Danicae Taraxaci castratione agamice propagari demonstratum est; species onmes Taraxaci semper parthenogenetice propagari verisimile est."

The problem has been found to involve difficulties and obscurities which will require considerable time to effectually disentangle, but results have already been secured which we believe ourselves justified in setting forth.

During the work we have been much in debt to the late …

The Insect Galls Of Cedar Point And Vicinity, Paul B. Sears

Papers in Ecology

The following list is based on rather careful collections made during the summer of 1914. Since the list contains many forms common throughout Ohio, I have aimed to make the synonymy fairly complete to date, as an aid to students, while the bibliography has been limited to original description (where possible) and some more recent notice which should be helpful.

In the course of this work I have become deeply indebted to Mr. W. J. Kostir, of Ohio State University, while Prof. Herbert Osborn, Prof. B. W. Wells, Prof. Myron Swenk, Miss Edith Patch, Mr. Nathan Banks and others have …

A Revision Of The Cestode Family Proteocephalidae, George Roger La Rue

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Introduction

Several years ago while studying under Professor Henry B. Ward .at the University of Nebraska the writer began an investigation of a cestode parasitic in Amblystoma tigrinum (Green). That investigation resulted in a paper (La Rue 1909) in which a number of points in the anatomy of Proteocephalids were cleared up and certain problems were -outlined for investigation at an early date. In the meantime the writer became interested in the large number of Proteocephalids which Professor Ward had secured by work in the field and by exchange. The writer had also made some collections. A preliminary study of …

Dramatic Elements In American Indian Ceremonials, Virginia Shropshire Heath

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

"Poetry in general," says Aristotle, "seems to have sprung from two causes, each of them lying deep in our nature-first, the instinct of imitation ..., next, ... the instinct for 'harmony' and 'rhythm.'" Many of the lyric-legend-dance complexes of certain North American Indian religious ceremonials would seem to bear out this judgment. Indeed, in not a few of the unmistakably poetic expressions, there may be found well-defined dramatic elements suggesting the possibility of a developed, independent dramatic literature, had these savage peoples been left alone to initiate a civilization and culture of their own. The South American Indians were capable …

Summary Of Two Years' Study Of Insects In Relation To Pellagra, Allan H. Jennings

Harold W. Manter Laboratory of Parasitology: Library Materials

Excerpt:

With the growing interest in pellagra, following the authoritative recognition of its presence in the United States in 1907, the study of its etiology was taken up by various investigators and the several theories of causation were subjected to close scrutiny.

Prominent among these theories was that of insect transmission, first advanced by Sambon, who limited this function to the species of blood-sucking gnats comprising the genus Simulium.

The importance of the disease and the possibility of such a factor in its causation, led the Bureau of Entomology, late in 1911, to undertake an investigation of the subject …

Experimental Ingestion By Man Of Cysticerci Of Carnivore Tapeworms, Maurice C. Hall

Harold W. Manter Laboratory of Parasitology: Library Materials

Excerpt:

Having experimentally eaten the larvae of dog tapeworms on two occasions, I undertook to look up the literature on this subject in connection with the ingestion of Cysticercus pisiformis to check the frequently quoted record of T. pisiformis from man. I find that there are more cases of the sort than I had supposed, so I have collected these cases in connection with a recent similar case of my own.

Taenia pisiformis, under the name of T. serrata, has been recorded as a parasite of man by Vital ( 1874), who records, in effect, two cases. One …

The Destruction Of The Vitality Of Cysticercus Bovis By Freezing, Brayton H. Ransom

Harold W. Manter Laboratory of Parasitology: Library Materials

First two paragraphs:

The question as to the length of time Cysticercus bovis may survive after the death of its host has been quite definitely settled by the researches of Perroncito, Zschocke, Ostertag and others. Perroncito (1877) found that the cysticerci in an artificially infested calf were all dead fourteen days after the slaughter of the animal. However, Zschocke (1896) succeeded in infesting the human subject with a tapeworm by feeding five cysticerci from beef kept from fourteen to sixteen days after slaughter. No infestation followed the swallowing of five cysticerci from beef kept twenty-one days after slaughter. Ostertag (1897) …

Observations On The Eggs Of Ascaris Lumbricoides, Winthrop D. Foster

Harold W. Manter Laboratory of Parasitology: Library Materials

First paragraph:

The appearance of the ova of Ascaris lumbricoides as seen in fresh feces is so well known to physicians and zoologists that description is unnecessary. Occasionally, however, ascarid eggs are found which differ so widely from the normal egg of Ascaris lumbricoides as to cause considerable confusion on the part of observers, and may even be so misleading in appearance as to be attributed to another species. One of these atypical forms, the unfertilized egg of Ascaris lumbricoides, first reported by Miura and Nishiuchi (1902), is by no means rare, and is usually seen in the feces …

Dr. Nott's Theory Of Insect Causation Of Disease, William A. Riley

Harold W. Manter Laboratory of Parasitology: Library Materials

Excerpt:

The danger in using isolated sentences from an article as a basis for interpreting the author's theories, is generally recognized, but sometimes the most careful workers fall into the trap. Once the mistaken interpretation is published, it may be copied over and over again until it rises to the dignity of a dogma.

A striking illustration is afforded by the practical unanimity with which writers on the subject of insects and disease credit Dr. Josiah Nott with being the earliest to formulate definitely the theory of mosquito transmission of yellow fever.

Nuttall, in his classic monograph On the Role …

Variation In Oxyurias: Its Bearing On The Value Of A Nematode Formula, Stanley B. Fracker

Harold W. Manter Laboratory of Parasitology: Library Materials

Excerpt:

One of the most difficult problems in zoologic science is the classification of round worms. Authors and lecturers, after a carefully outlined and definitely arranged discussion of trematodes and cestodes, are compelled to consider nematodes in a somewhat desultory and inaccurate fashion. Two reasons for this may be given, the greater being the apparent lack of a basis for determining the phylogeny of the major groups, a condition with which we are not at present concerned. The other obstacle is the difficulty of differentiating between species and uncertainty as to the value of different kinds of taxonomic characters. The …

Rhabditin, Nathan Augustus Cobb

Harold W. Manter Laboratory of Parasitology: Library Materials

Excerpt:

Rhabditin is the term applied by the writer to an organic substance, the type form of which is found crystallized in brilliantly doubly refractive spheres arranged in a definite way in the cells of the intestine. Rhabditis monhystera Bütschli, and other nematodes, in whose metabolism it plays an important role.

Rhabditin crystallizes under the life influences of Rhabditis monhystera into spheres, about 1 to 3 microns in diameter, which are rather slowly soluble in water, rapidly so in alkalies and acids—in the latter without effervescence—and are insoluble or but very slowly soluble in alcohol, glycerin, xylol and oils. The …

The Storage And Use Of Soil Moisture. Report Of Experimental Substation, North Platte, Nebraska, W. W. Burr

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The profitable cultivation of the non-irrigable lands in west central and western Nebraska is limited by the amount and efficient use of the precipitation. There are tracts of land in the sand hills and minor tracts of badly worn heavier soils where the need of soil fertility is becoming evident. But, in the main, the great problem at present is not one of soil fertility, but of how to get enough water to make use of the fertility now present. The rainfall of this section, which varies from an actual shortage to seldom more than a meager sufficiency, makes it …

On The Sedges Of Nebraska (Family Cyperaceae), John Mallory Bates

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

The sedges (Family Cyperaceae) are grass-like plants, but easily distinguished from the true grasses (Poaceae) by the following characteristics: culms solid, pithy, cylindrical, trigonous or flattened. Grass culms by contrast are mostly hollow and cylindrical. Sheaths not open lengthwise opposite the leaf blade, tightly enclosing the culm. Spikes simple or compound, mostly subtended by leaflike bracts, which are sometimes longer than the culm. Spikelets one- to many-flowered, each flower subtended and sometimes embraced by a single short herbaceous or scarious bract or scale, the most characteristic mark of this family. Fruit an achene, trigonous, lenticular, or plano-convex; …

Iv. On A New Fossil Fungus From The Nebraska Pliocene, A. C. Whitford

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

While studying the fossil woods of Nebraska, under the direction of Dr. E. H. Barbour, it was my good fortune to find an interesting specimen. This specimen is in the collection of fossil woods in the Nebraska State Museum, and was collected by Dr. Barbour from the Pliocene, or Snake Creek beds, about 20 miles south of Agate, Nebraska, during the summer of 1911.
The specimen itself is about six inches long by four inches wide and two inches thick. It has the appearance of typical agatized wood, but has numerous limonite streaks running through it. Upon sectioning the specimen, …

I. On The Distribution And Composition Of The Humus Of The Loess Soils Of The Transition Region, Morris Blish

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

The main object of this investigation has been to determine the distribution of the humus, to a depth of six feet, throughout the soils in representative virgin prairies of the so-called “transition region" of Nebraska. This region is the large area which extends westward from the Missouri River for a distance of over three hundred miles and which is covered, for the most part, with loess soil. This is, agriculturally, the most important soil in the state of Nebraska, and covers more than half the area of the state. The term "transition region" is employed to convey the idea of …

V. Mammalian Fossils From Devil’S Gulch, Erwin Barbour

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

The fauna of the beds at Devil's Gulch and vicinity is rich and varied, and promises to fill certain gaps in the Pliocene and early Pleistocene, where investigation seems especially desirable. The object of this paper is to make a partial faunal list and to describe two new proboscideans and a new equine.

The Inheritance Of A Recurring Somatic Variation In Variegated Ears Of Maize, R. A. Emerson

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The inheritance of variegation has special interest and importance in genetics. In this paper I shall present data from maize and attempt to show how they can be interpreted in strictly Mendelian terms.

Revisions Of Some Plant Phyla, Charles E. Bessey

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

In the time that has elapsed since the publication of my "Synopsis of Plant Phyla" (University Studies, Vol. VII, NO. 4) it has been possible to make many changes in the arrangement of the orders and families of several of the phyla. On account of their considerable number it is desirable to present these changes in one paper so as to accomplish the revision of the original paper with as little confusion as possible.

The Plant World is here regarded as readily separable into fourteen Phyla (often called "Branches" or "Divisions"). These are subdivided into Classes, and these again into …

Synopsis Of The Conjugate Algae-Zygophyceae, Charles E. Bessey

School of Biological Sciences: Faculty Publications

A dozen or more years ago the writer prepared a series of papers on these plants, which were published in volumes 21, 22 and 23 of these Transactions, and now it seems that time enough has elapsed to warrant another paper dealing with the same group, and including such revisions as are now made necessary because of our better knowledge of their structure, and the structure of the nearly related plants.

Studies Of North American Bees, Myron Harmon Swenk

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

The present paper is the second of the series proposed in a previous contribution on the family Nomadidae (antea, XII, pp. 1- 113 ) , and aims to tabulate and list the bees of the family Stelididae occurring in Nebraska, together with annotations concerning their distribution, comparative abundance and season of flight. As in the previous study, records and descriptions of specimens from outside Nebraska before the writer are included where these seem to add anything to our knowledge of the species concerned.

A Notable Botanical Career, Charles E. Bessey

School of Biological Sciences: Faculty Publications

I have before me the " Report of the Botanist" to the Regents of the University of the State of New York, bearing date of January 1, 1868, covering less than two pages, and signed by Charles H. Peck. There is internal evidence that his services began July 1, 1867, the writer reporting what he had accomplished in the half year since that date. A year later the " Report of the Botanist " covered about 80 pages and included a short general statement followed by (A) List of Species of Which Specimens Have Been Mounted; (B) Plants Collected; (C) …

Rocky Mountain Flowers, Frederic E. Clements, Edith Schwartz Clements

School of Biological Sciences: Faculty Publications

AN ILLUSTRATED GUIDE FOR PLANT-LOVERS AND PLANT-USERS WITH TWENTY-FIVE PLATES IN COLOR AND TWENTY-TWO PLATES IN BLACK AND WHITE

The present book is an endeavor to present the materials of the Rocky Mountain flora in preliminary form from the standpoint of the experimental ecologist. The latter is concerned primarily with the relationships of "species" and their subdivisions as an organic expression or measure of habitat differences, and of the competitive relations of the various formations. Whatever the taxonomic value of the numerous segregates of the last decade or two, the fact that the binomial form conceals the relationship to the …

Contributions To A Science Of Nematology, Nathan Augustus Cobb

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Contents

I. Antarctic Marine Free-Living Nematodes of the Shackleton Expedition.

II. North American Free-Living Fresh-Water Nematodes.

III. The Asymmetry of the Nematode Bunonema inequale, n. sp.

IV. Selachinema, a New Nematode Genus with Remarkable Mandibles.

V. Notes on Nemas.

VI. The Mononchs, a Genus of Free-Living Predatory Nematodes.

VII. Filter-Bed Nemas: Nematodes of the Slow Sand Filter-Beds of American Cities.

VIII. The Orders and Classes of Nemas.

IX. One Hundred New Nemas (Type Species of 100 New Genera).

X. Howardula benigna, a Nemic Parasite Cucumber-Beetle.

XI. Marionella.

XII. Greeffiella.

XIII. An Amendation of Hoplolaimus …