Little is known about upland agricultural grassland soil invertebrate composition and its contribution to ecosystem functioning. Soil-dwelling organisms play a central role in soil formation, plant nutrition, and are significant food contributors for organisms in several trophic levels. Information is needed about mesofauna seasonal population and composition trends throughout the...
During the past year the rapid increase in the cost of copper and aluminum has led operating companies to investigate the feasibility of using iron and steel conductors for transmission and distribution purposes where small blocks of power are to be served. This Thesis gives the results of tests on...
Quarantine and inspection as generally applied,
both in the past and at present, has been limited to
horticultural plants and horticultural plant products
as nursery stock including trees, shrubs, vines, cuttings,
ornamentals, scions, buds, rootings, bulbs,
herbs, dried fruits, etc. This application is without
a question too narrow, as it...
On account of the abundance of the antique tussock
moth, and the ease with which material for study can be
secured in the vicinity of Corvallis, an investigation
of this insect was thought to be a fitting subject for
my graduation thesis. The work was begun in the spring
of...
The question of whether to purchase power or to
maintain an isolated plant is one which frequently
confronts the engineer, and the problem is by no means
easy of solution, as there are a number of factors
which vary with individual cases and determine the
economy and desirability of the...
Following the installation of a street car
system, or for that matter, any other electric system,
using the ground return, or the rail return which comes
in contact with the ground, there is always more or
less trouble experienced by water or gas companies,
using metal pipe, due to the...
The scope of this thesis consists primarily of
an exposition upon the merits of indirect and. semi-indirect
illumination. In deriving our conclusions, we
have considered two sources of information: firstly,
that of test data from a number of indirect and direct
installations, and. secondly, the opinion of men familiar
with...
The object of this work was to determine, as far as
possible, the germinating ability of pollen of different
varieties of fruit. The work was started with the idea
of making these determinations for both apples and pears but owing to lack of time and probably because the proper culture...
This machine Is the first series arc machine installed
In the city of Portland. It was obtained by
the Electrical Department of O.A.C., with the object
of rewinding it for a high current machine to be used
in the charging of storage batteries.
The purpose of this thesis is the determination of the load characteristics of the Steam-Hyciro-Electric Plant owned and operated by the Lebanon Electric Power and Water Co. This corporation furnishes electrical energy for power and lighting service and also the water supply to the city of Lebanon, Oregon.
"There are at present four common methods of con
verting the alternating current into direct current.
These are in order of use, the motor generator set,
the rotary converter, mercury vapor rectifier and the
Murphy rectifier. A short description of these and
connections for the last two will be given."--p.2
The most interesting study connected with the
development of the American novel is the accompanying
feature of the growth of the country itself. In a
certain way the changes seem peculiar, but in another
way they are exactly what we might be led to expect.
In tracing the development from...
"A woman inherits capabilities of becoming such an
helpmeet, but she stands sadly in need of training for
the development of these capacities and for the acquirement of skill in doing these tasks after she realizes her ability. Education does not consist of facts
stored away in the brain, there...
Much has been accomplished in the last few years
toward the conservation of natural resources, and in
this work the engineer has taken a leading part. The
prevention of unnecessary waste, the utilization of
hitherto useless by-products, and the economic production of the world's necessities are important features of this...
"In his style Hawthorne early developed that maturity
of dignified composure, free from constraint or affectation,
and that lucid expression, which are among
its most characteristic traits. With little faculties
for the harmony of verse he had a singular command over
the musical qualities of prose, enabling him to produce...
