McGill University Thèses et mémoires publiés en 1958

The power absorption due to cyclotron resonance and magneto-optical absorption is calculated for pure graphite at absolute zero temperature. The spin of the electron and the electron - lattice relaxation time are neglected. The formalism adopted for calculating the momentum wave functions and the matrix elements of the electric perturbation is that of Luttinger and Kohn. It is found that the power absorption due to cyclotron resonance should not be symmetrical with respect to a change in sign of the magnetic field.  Lire la suite

An ascaroid worm is common in the stomach of various seals in the eastern North Atlantic Ocean. Its infective larva occurs in a variety of ground fish in the Gulf of St. Lawrence and the seals become infected by eating the infected fish. As the incomplete knowledge of this nematode has caused considerable confusion over its nomenclature and relationships, it is proposed to make it the type species of the new genus Phocanema.  Lire la suite

Silicon is the second most abundant element in the earth's crust. Because of the solubility of silicates of alkali metals a considerable quantity of silicon is absorbed by plants and variable amounts are ingested with plants by animals. Of the amount ingested a small proportion gains an entrance into the body and is distributed in all tissues. The question which has been entertained by many workers is whether silicon is an essential element in animal metabolism. On certain theoretical grounds silicon is considered to be classified among those possibly essential (1).  Lire la suite

The problem of phase measurement at microwave frequencies has been investigated and an automatic, recording system developed for use in microwave optics studies. The phase plotter operates at 9.3 Kmc/s and measures phase and intensity of a field continuously along chosen scanning lines. The phase measurement is essentially independent of intensity variations of up to 40 db and the follow-up response during automatic operation is over 90° per second. The accuracy is + 5° in automatic operation and + 2° when operated manually. The system's operation depends on the Homodyne technique. Automatic operation is made possible by the development of …  Lire la suite

The Sterling Area can be tentatively defined as the monetary union existing mainly between the United Kingdom and the overseas Cornrnonwealth, with the important exception of Canada. Membership has been extended from time to time, formally or only de facto, to countries outside the political framework of the Commonwealth as well. In its technical aspects this monetary union can be described as an association of the United Kingdom with certain countries whose trade is financed mainly in sterling and whose reserves are mainly held in sterling (underlined by the writer, ref (1) p. VIII ). Some basic characteristics such as …  Lire la suite

Vers 1830 paraissent en France les premières traductions des romans maritimes de Fenimore Cooper. On aime aussitôt à les lire, à se gorger de ces récite fantastiques e a vie aventureuse des pirates. Mais l'on regrette que l'auteur soit étranger et l’on cherche un romancier de la mer qui soit français. Au "pays des quatre mers", il devrait être facile d'en dénicher. Mais peines perdues: une enquête en règle ne livre as un seul véritable romancier maritime français! [...]  Lire la suite

The system of transliteration in this thesis is that used by C.A. Storey in his Persian Bibliography (item no. 7 in the Classified Bibliography), in which he retains popular spelling for the names of a few cities, such as Delhi and Lahore, but transliterates Agrah. l have accepted such inconsistencies, preferring the inconsistencies of a scholar to my own. The Persian titles of works, such as the A'in-i Akbari, are not transliterated according to this system, but have been spelled according to the title-page of the first volume, likewise with authors' names. [...]  Lire la suite

The genus Strongyloides is a common genus of nematodes parasitic in numerous animals, including man. It is unusual in its life cycle in that it is parthenogenetic in its parasitic phase and normally has a bisexual generation outside of the host, thereby increasing the number of potential infective larvae. In addition, however, the bisexual generation may be omitted when the larvae developing from the eggs of the parthenogenetic female develop directly into infective larvae instead of free living adults. The conditions causing these changes, in spite of extensive investigations by various workers are still largely unknown, and many problems still …  Lire la suite

The word "career" has attained a striking popularity with the public personnel administrator on both sides of the Atlantic. Most frequently seen in recruitment literature, it is also found quite prominently in writings concerned with different aspects of public personnel administration. The concept of "career" has obviously been growing in importance, both with the administrator and with the ordinary staff member, and both have become increasingly concerned with it. The aims of this enquiry are to study the nature of the concept of career, both in theory and practice, as it applies to the Federal civil service of Canada; to …  Lire la suite

Studies on bilingual children have raised important questions about the effects of early bilingualism on linguistic and intellectual development. The inferiority of the bilingual, not only in the second language, but also in the first, has been suggested by severa! investigators (e.g. Smith, 1939). On the other hand, the view is commonly expressed by educationists that overlearning the first language hinders the acquisition of a second whereas the early introduction of a second language facilitates its acquisition. [...]  Lire la suite

The cross sections for the reactions Cu63(p,n)Zn63 and Cu63(p,pn)Cu62 were measured in comparison with the known cross section C12(p,pn)C 11. For the reaction Cu63(p, n)Zn63, the maximum value of the cross section was 528 millibarns at a mean proton energy of 12.3 Mev. Cross section values for the reaction Cu63(p,pn)Cu62 were determined up to proton energies of 22.5 Mev. At this energy the cross section is 775 millibarns and is still rising slowly. The excitation curves are rather smooth. The curves do not have any major peaks like in oxygen and there is no sure evidence for minor peaks.  Lire la suite

The development of science is illumined at fortunately frequent intervals by the unmistakeable emergence of men who provide their field of endeavor, if not all of science, with a formulation, a concept or a law that synthesizes the tomes of unfathomably scattered 'facts' elaborated by their predecessors. [...]  Lire la suite

In the atmosphere moist air rises and cools adiabatically, its vapeur density and temperature following a path such as A in Fig. l. If the air continues to rise and grows colder than its dew point (B), the excess water substance will condense in the form of cloud. [...]  Lire la suite

Although allergy and immunity may appear, on superficial examination, to be two unrelated phenomena, studies have revealed that the mechanisms of the reactions involved in the manifestations of the immune and allergic states have common features. A brief survey of the fundamental aspects of immunology would therefore appear to be essential prior to a discussion of the mechanisms involved in the allergic reaction. The existence of immunity can be observed in an animal which, having recovered from a bacterial infection, is found to be resistant to a second infection with the pathogenic organism. The serum obtained from such an animal …  Lire la suite

The development of conceptions of the mechanism of absorption from the intestinal tract, as well as absorption in other parts of the organism, can almost be followed by the development of terminology used to describe this process. It is of interest to note that from the start the interpretations of the principles, varied as they were, centred around physical or physicochemical causes. Explanations of various biological phenomena in physical terms came about in the first half of the nineteenth century, when efforts were directed toward solving problems that were attributed to "vital forces" bound up with the living cell protoplasm.  Lire la suite

This is an examination of various aspects of the problem of crimes aboard aircraft, which is receiving attention from individual jurists and from international organizations today.  Lire la suite

Rapid progress has been made in the understanding of the pathways of homeostatic responses. It is now known that any disturbance in the steady state of the body's internal environment, be it abrupt or tedious, exogenous or endogenous to the organism, will evoke in it rapid and complex responses, mediated through its endocrine and nervous systems and tending to counteract the effects of the disturbing stimulus.  Lire la suite

In eastern Canada, the marine fishing industry is based upon the capture, processing, and distribution of groundfish stocks. The areas fished are ideal for the reproduction of the economically important species such as the gadids and the pleuronectids. The presence of a partially enclosed body of water, such as the Gulf of St. Lawrence is also ideal for the capture of the mature fish. The ice factor encountered in a climate of such extremes forms an interesting, enforced, natural means of conserving the younger stock by limiting the duration of the fishing season. [...]  Lire la suite

This essay deals with what is commonly called the Canadian 'money market'. Money Market is not a highly refined phrase in the same sense as are 'income-elasticity of demand' or 'marginal efficiency of capital'. Rather it is part of that colourful but mystifying language that is heard in the City, on Wall Street, and on St. James and Bay Streets. [...]  Lire la suite

The splitting of a nucleus into roughly equal parts is termed nuclear fission. Although ternary and quaternary fission events have been reported, these would be extremely rare. Usually fission implies binary fission and this meaning will apply throughout this thesis.  Lire la suite

The geology at the southern end of Lake Mistassini was studied during the summers of 1956 and 1957. This thesis is a presentation of information gathered in the field, and deals with the problem of the Grenville front in the McOuat - Gauvin area.  Lire la suite

Strutt, in particular, made valuable contributions to the development of appropriate apparatus for the production of active nitrogen. In 1916 he published a diagram of a discharge tube apparatus in which aluminum electrodes were used, and this metal still remains the favoured electrode material for the production of active nitrogen.  Lire la suite

In the development of economic thought, and particularly since the construction of Quesnay's "Tableau Economic", concern for an understanding of the processes of the economy has exerted a major influence on economic thinking. With advances in technology, expansion of industrialization, accumulation of capital, growth of population and extension of the division of labour, agriculture and the rest of the economy have become increasingly dependent upon one another. [...]  Lire la suite

The most obvious function of the blood clotting mechanism is to prevent the loss of blood from the vascular system, by the formation of a clot. It is easy to understand why excessive blood loss may occur after injury if the clotting process is impaired since the formation of the clot may be seriously retarded or even may fail to take place. It is much more difficult to understand why when the clotting mechanism is impaired spontaneous bleeding occurs even though no physical trauma has been imposed. [...]  Lire la suite

This study seeks to analyze the development of Etherege's art, with emphasis upon characterization, as manifested in his plays, and to illustrate by means of this examination his gradually heightened awareness of the closely-knit but complex world in which he lived. I have touched upon such topics as Etherege's life, the details of presentation and publication of his plays, the detailed tracing of English and French literary influences in the works, and critical judgments of the moral values of his society, only insofar as they directly concern the purpose of this paper, which takes as its point of departure the …  Lire la suite

The field of respiratory physiology has many facets; the literature on the subject is voluminous, and much of it is conflicting. Many facts concerning the control and mechanism of respiration have been established, but much circumstantial and indirect evidence as well as speculation have been, and are, accepted as facts. For the past hundred years physiologists have been investigating the control of pulmonary ventilation and the regulation of the respiratory cycle. [...]  Lire la suite

The growing and feeding of roughages form the basis of a major part of Eastern Canadian agriculture. Thus the problems of the production of forages, their evaluation and their utilization by ruminants take on great importance. Moreover, the need for a meaningful measurement of the feeding value of forages is becoming increasingly pressing in the face of the growing volume of evidence of the inadequacy of present chemical and physical methods of evaluation.  Lire la suite

Interest was aroused in thyroid immunology and its relationship to thyroid pathology by the recent publications of two groups of investigators. Witebsky, Rose and Shullman, a team of immunologists working on organ-specificity of the thyroid gland were successful in immunizing rabbits with their own thyroid extract, and, they also demonstrated morphologic changes in the thyroid gland which resembled those seen in Hashimoto's disease. Doniach, Roit and Hudson, a group of clinical investigators demonstrated the presence of thyroid auto-antibodies in the sera of patients with Hashimoto's disease.  Lire la suite

Absolute cross-sections have been measured at energies from 15 to 32 Mev. for several proton induced reactions in heavy nuclei. [...]  Lire la suite

The career of James Burney (1750-1821) included nearly sixty years of experience in naval affairs, in voyages of exploration throughout the world, and in publication of scientific writings on travel and discovery. During the naval mutiny in 1797 he wrote a letter to Lord Spencer, then First Lord of the Admiralty, in which he set forth what he believed to be the causes of the uprising, and made recommandations whereby the naval service might be improved. [...]  Lire la suite

Nous nous proposons d'introduire cette étude sur l'autonomie fonctionnelle des différentes couches histologiques du cortex surrénal en décrivant l'évolution historique des théories admises à ce sujet. Nous relaterons ensuite les idées actuelles sur la biogénese des différents corticostéroides, ainsi que la régulation de leur sécretion sous l'influence de la corticotropine.  Lire la suite

The most complete accounts of Lepidoperon embryology are by Toyama (1902), Eastham. (1927), Johannsen (1929), Gross and Howland (1940), Rempel (1951) and Presser and Rutschky (1957). There are many other papers that either deal with the development of only one or a few structures or review knowledge of a specific subject. [...]  Lire la suite

This paper reviews the work done by early investigators, and discusses the theories proposed to explain the presence of microwave signals well beyond the horizon. The experimental work carried out to investigate the effect of meteorological phenomena on the signal received over a microwave link between Ottawa and Dorval Airport is described. Further experiments which suggested themselves as a result of this work are outlined.  Lire la suite

At the end of the proof of lemma 4 of section 4 it is shown that if (x, y) is a generic point of a connected one-dimensional algebraic subgroup G of D2, and x=1, then (x,y) satisfies an irreducible equation [...]  Lire la suite

Systematic studies on the metabolic activities of nervous tissue began with the classical studies of Warburg, Posener and Negelein. They measured oxygen consumption, aerobic and anaerobic glycolysis of several tissues of the rat in an attempt to investigate the differences between the metabolism of neoplastic and normal tissues. Among their normal tissues they included brain cortex slices and retina. [...]  Lire la suite

The purpose of this investigation is to study correlates of decisions made in personnel selection interviews. The identification of such correlates serves to demonstrate factors which may account for the unreliability of interview decisions.  Lire la suite

Ce sage conseil de Sainte-Beuve inspirera notre travail d'apprenti-critique. Considérons notre homme comme un prisme taillé par la vie, les évenements qui, au cours des années, ont façonné son esprit et sa personnalité. A travers les facettes erre la pensée secrète, le génie intime de l'individu. Notre cristal sera Voltaire ciselé par les événements d'une année de sa vie. En tournant et en retournant ces 365 jours, et en examinant de près le spectre lumineux, nous espérons trouver au bout de l'arc-en-ciel la flamme qui est l'essence de l'homme.  Lire la suite

Studies of population trends in the Western world over the past fifty years indicate that the aged, that is, those persons over 65 years, have increased, as a group, both relatively and absolutely. This, in turn, has created a shift in the balance between dependants, i.e., those under 20 and those over 65, to the bread-winners, throwing a heavier burden on the earning population. These trends have had wide ramifications in our economic and social institutions, and have made research and planning imperative in the field of geriatrics.  Lire la suite

The problem of mixing of subsonic circular jets with stationary fluid and with a stream at right angle has been studied. The present knowledge and conventional methods of approach to this problem are described. Applying Elrod's momentum diffusion theory of heat conduction to the mixing of a circular jet issued to a stationary fluid, the velocity distribution in the mixing region has been calculated and compared to Corrsin's experiment, and proved to be not quite satisfactory, especially at distance near the jet orifice. [...]  Lire la suite

Tests were conducted to investigate the change in the turbine performance characteristics of a single stage, axial flow gas turbine resulting from changes in the thermodynamic properties of the working fluid. These properties are determined by the values of Cp and y and the method of varying these values was to inject water into the turbine inlet gas stream.  Lire la suite

Radioactive cerium isotope of mass 135 was produced by proton bombardment in the McGill synchrocyclotron. The mass assignment of this isotope was made with the help of a yield curve for different bombardment energies. Gamma rays belonging to the chemically separated isotope were studied on a kicksorter. [...]  Lire la suite

The rapidly growing field of teratology has recorded an amazing variety of developmental aberrations, either "spontaneous", or with some more or less clear-cut genetic or environmental cause. This preliminary descriptive stage is certainly necessary as a guide to the further, more detailed, study of the pathogenesis of individual abnormalities. However no matter how many more abnormalities are added to the list this method will add very little to knowledge of the basic causes of developmental defects. [...]  Lire la suite

Disease resistance in a plant is a manifestation of a complex phenomenon which involves among other things, the inherent and acquired physiologic properties of not only the host but also those of the pathogen influenced by ever-changing conditions of both the macro- and micro-environment.  Lire la suite

One of the earliest contributions to the theory of electrolytic conductance was made by Kohlrausch (1), who observed that the equivalent conductance of an electrolyte at infinite dilution is the sum of two independent factors characteristic of the anion and cation respectively. This is known as Kohlrausch's "Law of Independent Migration of Ions". The classical theory of Arrhenius (2) published in 1885 was the next significant advance. He postulated that when an electrolyte is dissolved in a solvent, it partially dissociated into charged particles (now called ions). Another postulate of his theory was that the degree of dissociation of the …  Lire la suite

The condition which is now known as lead poisoning was familiar even in ancient times. Hippocrates (370 B.C.) was probably the first to associate lead with certain symptoms, such as severe attack of colic in a man who extracted metals. The symptoms of lead poisoning were more clearly defined in the first century A.D. by Dioscorides, “the drinking of litharge (red lead) causes oppression to the stomach, belly, and intestines, by its severe pressure; it suppresses the urine, while the body swells and acquires an unsightly leaden line”. He also speaks of paralysis and delirium as consequences of the ingestion …  Lire la suite

Lewis (1) in 1900 was the first to observe the yellow afterglow resulting from the passage of an electrical discharge through nitrogen and to identify its banded spectrum as that of nitrogen. In 1911 Strutt, later Lord Rayleigh (2), published the first in a series of papers on the chemical reactions of active nitrogen and the emission spectra associated with active nitrogen and its interaction with other substances. Metallic vapours, he found, were converted to the nitrides whereas various hydrocarbons, saturated, unsaturated and even substituted, yielded hydrogen cyanide with a concurrent emission of the CN spectrum.  Lire la suite

The Centre of a city is generally thought of as the centre of community life and of business life for the city. Ideally, it is more than this. Underlying the functional relationship of the parts comprising the Centre, are the guiding principles that foster the social, economic, architectural and planning aspects of the Centre. In contrast to some other areas of the city, the Centre is seldom professionally planned from the beginning, except in the case of a new town. The development of a city Centre, therefore, is largely concerned with the redesign and extension of an existing city Centre. …  Lire la suite

Ordinary vinegar is dilute acetic acid obtained from the oxidation of alcoholic liquids, and it was probably in this form that it was known from the earliest times. Vinegar was mentioned in three books of the Old Testament and Hippocrates is reported to have prescribed it as a medicine for his patients. Livy, the Latin prose writer, reported in his book No. XXI that Hannibal overcame the difficulty offered to the passage of his army in crossing the rocks or the Alps by dissolving the rocks with vinegar so that a pathway could be made. Thus, vinegar was known for …  Lire la suite

The past decade has seen a remarkable world-wide development in the field of thoracic surgery. Following the lead of surgeons in the United States, the United Kingdom and Sweden, and the original pioneering contributions made by our own Canadian surgeons, namely Doctor Edward Archibald, Dr. William Mustard and Doctor W.G. Bigelow, rapid strides are being made not only in the scope of thoracic surgery, generally, but, more specifically, in the advancement of cardiac surgery. The measure of success achieved by efforts to correct congenital cardiac anomalies by indirect surgical procedures has served to encourage world-wide research in developing techniques by …  Lire la suite

The physiology and anatomy of the kidney are relatively well known due to the large number of investigations which have been carried out. One aspect of kidney function which has been neglected is that dealing with the excretion and reabsorption of biocolloids. In many disease conditions large quantities of a great variety of proteins may be excreted in the urine. The nature of the pathological changes involved in many of these diseases is not understood. One of the reasons for this lack of understanding is the absence of direct evidence concerning the normal processes involved.  Lire la suite