Digital Commons Network^™

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 …

Anthrax Or Charbon: Points Of Popular Interest, Harry Morris

LSU Agricultural Experiment Station Reports

No abstract provided.

Initiation Of Development In Nereis, E. E. Just

Faculty Reprints

No abstract provided.

Guide To The Experiments In Cropping Now Running At The State Farms Of Narrogin, Merredin, Chapman, Geo L. Sutton

Grain and other field crops published reports

The publication of this Guide to experiments conducted at the State Farms is deemed desirable, in order that farmers may be made acquainted with the nature of the work and the progressive results obtained, The purpose of the alteration of practice initiated at the State Farms during the past three years is to carry on an original and definite plan for the improvement of agricultural methods, and to this end a series of experiments have been undertaken which would entail too much expense on the individual farmer, or involve a departure from his routine practice before the value of the …

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 …

New North American Bees Of The Genus Andrena, T. D. A. Cockerell, Henry L. Viereck

Co

No abstract provided.

Problem Des Hummelstaates, Ludwig Armbruster

An

Die Honigbienen, dieses Paradigma der Biologie, geben trotz aller "Apistik" uns noch manche Rätsel auf. So wichtige Aufschlüsse wir für eine richtige Bewertung der Bienenbiologie aus einem eingehenderen Studium der Hummeln erwarten dürfen, so lückenhaft ist - freilich relativ gesprochen - andererseits das, was wir genaueres von deren Leben und Treiben wissen.

Citrus Talks-The Future Of The Orange Industry, Charles C. Chapman

Charles C. Chapman Citrus Speeches

This is a speech read before the State Horticultural Convention in Los Angeles. Mr. Chapman offered the following observations about the future of the orange industry--that cost saving methods must be employed in the labor of handling and marketing of the fruit in order to compete with foreign markets. He also predicted that scientific methods may not only assist in finer and more uniform crops, but also in finding ways to make use of the byproducts of the orange. Increasing the export market for the orange will increase revenues and the opeing of the Panama Canal should assist with exporting …

Nachtrage Und Berichtigungen Zu Burgeff H., Kommentar Zum Katalogus Lepidopterorum (Gattung Zygaena) Im Laufenden Jahrgang Der Mitt. Der Munch. Ent. Ges. P.35-70, Max Bachmann

An

Z. Erebus Stdgr. Die Fig. 18 ist, wie sich bei einem nochmaligen Vergleich mit dem Original herausstellt, durch die bei dem Stück allein vorgenommene Retouche der roten Flügelteile diesem so unähnlich geworden, daß es am besten ist, sie als nicht vor-handen zu betrachten. Als Type für die ab. interrupta hat dann die Figur Romanoff's in Rom. Mem. Lep. 1. (1884) pi. IV, f. 4 zu gelten.

Nachtrage Und Berichtigungen Zu Burgeff H., Kommentar Zum Katalogus Lepidopterorum (Gattung Zygaena) Im Laufenden Jahrgang Der Mitt. Der Munch. Ent. Ges. P.35-70, Max Bachmann

An

Z. Erebus Stdgr. Die Fig. 18 ist, wie sich bei einem nochmaligen Vergleich mit dem Original herausstellt, durch die bei dem Stück allein vorgenommene Retouche der roten Flügelteile diesem so unähnlich geworden, daß es am besten ist, sie als nicht vor-handen zu betrachten. Als Type für die ab. interrupta hat dann die Figur Romanoff's in Rom. Mem. Lep. 1. (1884) pi. IV, f. 4 zu gelten.

Breeding Habits Of The Heteronereis Form Of Platynereis Megalops At Woods Hole, Mass., E. E. Just

Department of Biology Faculty Publications

No abstract provided.

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 …

Breeding Habits Of The Heteronereis Form Of Platynereis Megalops At Woods Hole, Mass., E. E. Just

Faculty Reprints

No abstract provided.

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) …

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 …

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 …

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 …

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 …

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 …

Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard

Journal of the Minnesota Academy of Science

No abstract provided.

Bulletin No. 135 - A Study In Annual Egg Production: Based On The Records Of A Flock Of Seven-Year-Old Hens And Their Progeny, E. D. Ball, Geo. Turpin, Byron Alder

UAES Bulletins

Experimental work in breeding for egg production was started with this flock of Single Comb White Leghorns in 1907. The flock of 1907 was hatched from eggs from a small flock that had been introduced into the plant two or three years before.

After two years' records of these flocks had been completed and studied it was found that nearly three-fourths of the first flock had made better records the second year than they did the first and that there was a great variation in the two years' records of individual hens. This raised the question of whether the first …

Newton Horace Winchell, 1839-1914, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.

Tributes From Early Associates

Journal of the Minnesota Academy of Science

No abstract provided.

Words Of Appreciation, O. W. Oestlund

Journal of the Minnesota Academy of Science

No abstract provided.

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 …

Some Species Of The Bee Genus Coelioxys, J. C. Crawford

Co

This paper discusses only species occurring in America north of Mexico and no table to separate the males has been included since Prof. T. D. A. Cockerell published a table for this sex in the Canadian Entomologist for June, 1912, pp. 167-170. The key to the females includes all the species for the region under consideration in which the female sex has been described. In the table here presented the characters used for separating rufitarsis Sm. from comstockii Cress. and lucrosa Cress. from moesta Cress. are the characters used by Prof. Cockerell in a table to separate the types of …