McGill University Thèses et mémoires publiés en 1952

In Economics, when the development of backward countries is being considered, the problem is usually treated with reference to some specific area. Most frequently a monograph is presented, a ease study documenting the economic possibililities and making definite policy recommendations for a given country. This method is essentially empirical and inductive; the concern is with immediate obstacles to economic progress. There is little attempt to deal with economic development more generally or to formulate a theory which might be applicable to a variety of countries and conditions.  Lire la suite

Mallory, J. R. (Supervisor)  Lire la suite

The consistent isolation and accurate classification of the pathogenic anerobic Actinomyces from clinically and histopathologically diagnosed cases of “true” Actinomyces is not always possible. This, it is felt is due primarily to the lack of known differentiating characteristics of the so-called Smooth form of the etiological agent.  Lire la suite

It has long been assumed that when a metal is placed into a solution of its ions an equilibrium is rapidly established in which a reversible interchange of atoms and ions take place. If one of the components of the system contains a radioactive isotope of the metal, it is possible to follow this exchange by observing the distribution of the active isotope among the atoms and ions persent.  Lire la suite

The presence of carotenoids in bacteria was demonstrated by Zopf in 1889, who designated this group of bacterial pigments lipochromes because of their solubility in the fat solvents. He demonstrated the presence of the carotenoids by means of the lipocyan reaction. This reaction is a color test for carotenoids and consist of adding concentrated sulfuric acid to an ethereal solution of the pigment and a positive test gives a deep indigo blue color.  Lire la suite

The particular form of epilepsy which often follows a focal lesion in the temporal lobe is characterized by various combinations of abnormal experience and unusual behaviour. The clinical significance of these subtle feelings, crude sensations and unusual actions has been known for some time. If we agree that focal lesions in the human temporal lobe may produce paroxysms characterized by subtle changes in perception, hallucinations and dreams, or unreasoning behaviour which is apparently automatic, it becomes obvious that this region must have important functional representations.  Lire la suite

The urban environment is frequently regarded as the highest expression of man’s advance within his physical environment and the ability to live together and act in concert with fellow men. To brace the development of these two factors is more than describing a panorama of bricks, steel, and asphalt against a background of dates and statistics. In any large community a heritage arises from the interplay of ethnic and religious forces with the cultural approaches to the environment. The forms that this heritage takes in early communal life are expressed in the urban environment in visual and less tangible structures …  Lire la suite

In an electromyographic (EMG) study of mirror tracing, Smith (27) found that muscle tension increased progressively during the task. He inferred that muscle tension is a function of the perceived distance from the goal, and that this relationship reflects a progressive increase in the organization of take directed processes in the central nervous system.  Lire la suite

The importance of atoms and free radicals as intermediates in many chemical reactions is now becoming increasingly apparent. The transitory nature of the intermediates, ie, their comparatively short lifetimes, and their relatively low steady state concentrations, have in the past complicated the identification and elucidation of the elementary reactions in which they are involved.  Lire la suite

This investigation was undertaken at the suggestion of Dr. Bram Rose in order to assess what happens to the histamine content of human nasal mucous membrane during allergic raction. In previous work carried out by Rose, Entin and Baxter (1951) on the histamine content of various human tissues, several high values (101 and 140 Y per gram) were obtained on antral mucous membrane from allergic individuals. The exact significance of such findings was not clear.  Lire la suite

This research was undertaken in order to obtain some knowledge of the role of biotin in mammalian metabolism. Toward this end, preliminary gross metabolism experiements were performed in which biotin-carboxyl-carbon-14 was injected into white mice and the various tissues and excreta examind for radioactivity. In the course of these experiments, an appreciable fraction of the injected activity appeared in the expired carbon dioxide.  Lire la suite

The importance of the problem of mixing cold air jets with a hot gas stream is outlined, with particular reference to gas turbine combustion chamber design. Present knowledge of the process of eddy diffusion and mechanical or bulk mixing is reviewed. An apparatus constructed for the study of the particular problem of cold air jets issuing from a flat wall in a direction approximately normal to a hot gas steam described.  Lire la suite

The diffraction of an acoustic wave by an aperture in an infinite plane screen is investigated experimentally and theoretically. Measurements are restricted to circular and square apertures illuminated by an acoustic wave of wavelength of about 3 cm. The diffracted field is examined over a considerable range of distances relative to the plane of the aperture.  Lire la suite

This is a study of the personality of rheumatoid arthritis patients specifically concerned with the characteristic ways in which these patients may deal with interpersonal relationships, influences which appear to be involved in the development of such behaviour patterns, and the relationship of the illness to the personality manifesting these characteristics. This is one of four sections of a pilot study which aimed to discover the influences, stresses, tensions and adjustments in the social field of the patient and how these are related to the precipitation, course, outcome, and possible prevention of the illness.  Lire la suite

Stream current, electro-osmotic flow, conductance, and permeability measurements were carried out on a cylindrical pads composed of different fibrous materials over a range of solid concentrations. The Z-potentials calculated from stream current and electro-osmotic measurements on the same pad were shown to be identical. Some deficiencies of the bubble flowmeter used to meaure the electro-osmotic flow were investigated and explained theoretically; a new type of flowmeter, free from these defects, was proposed.  Lire la suite

The lifting of the government imposed ban on uranium prospecting, in 1948, has resulted in a surge of activity in the Goldfields region of northern Saskatchewan. In response to the insuing demand for geological maps the Geological Survey of Canada has undertaken to systematically map the region on a 1 mile to 1 inch scale. In 1950 and 1951 the writer carried out this work east of Goldfields by mapping Forget Lake and Nevins Lake map-areas ( Blake 14, 15 ). The main interest of these areas at present is in their nearness to the scene of active prospecting and …  Lire la suite

This is one section of a pilot study conducted jointly by a team consisting of a physician, two psychiatrists, a psychologist and four social workers. The purpose of the study is to gain further information regarding the part played by multiple stresses in bringing about rheumatoid arthritis. Four social workers took part in the study. Each one interviewed twenty patients with the diagnosis of rheumatoid arthritis according to a plan structured in co-operation with the psychiatrist.  Lire la suite

Distortion of radar echo patterns by rain attenuation can be corrected by measuring the area under the rain intensity-range curves in successive steps and correcting the succeeding steps in accordance with the attenuation indicated by the preceding ones. Great accuracy in the initial calibration of the radar is necessary to avoid increase of error in the corrected rain intensities with depth into the rain shower. A radar calibration error of plus or minus 15% in rain intensity, or approximately 1 db in power level, is amplified by attenuation corrections, until at a depth into the shower equivalent to 100 mm …  Lire la suite

An experimental and theoretical investigation of the measurement of electromagnetic fields has show that, in the region close to the source of the energy or to an obstrcution, the voltage generated at the terminals of an antenna immersed in the field is not an accurate measurement of the field. It is concluded that the error is due to the directive properties of the probe, and this error can be calculated by inserting a weighting function into the integral expression for the intensity.  Lire la suite

Graham Greene’s first three novels are historical adventure stories. For example, the man within, published in 1929, is the story of a young man who betrays his fellow smugglers into the hands of the law. The examination of his fear because of his knowledge that they will be avenged, constitutes the main material of the book. The novels of Greene which appeared in the period 1932-1938, however, have a contemporary setting.  Lire la suite

Younge, Eva R. (Supervisor)  Lire la suite

The reaction of nitrogen atoms with propane has been found to produce hydrogen cyanide, ethane, ethylene, methane and hydrogen in the temperature range 75c. – 292c. The rate of hydrogen cyanide formation at a constant nitrogen atom flow rate increased with increasing propane flow rate; no corresponding increase was observed for the rates of formation of the other hydrocarbons. Second order specific rate constants were calculated from the rates of disappearance of propane.  Lire la suite

The early observation that chlorination was an effective delignification agent of wood eventually led to the commercial Pomilio pulping process and to the alkaline hypochlorite bleaching of wood pulps. The study of the lignin products from these and other chlorination processes suffered from the presence of the carbohydrate fraction and from the pressure of the industrial point of view. Moreover, the conditions employed in industry were not necessarily the most advantageous for fundamental lignin studies, so that many lignin products were often highly chlorinated and badly degraded. This circumstance led to the abandonment of chlorination as a means of studying …  Lire la suite

The purpose or this investigation is to give a description of the geology, with accompanying maps, of two areas near Millertown, Newfoundland. The field work was done during the summers of 1950 and 1951 for the Buchans Mining Company as a part of its scheme of systematically mapping their large mineral concession. Although the areas are not adjoining, the geology of the two will give a picture of the rock types found in crossing the “Central Mineralized Belt of Newfoundland”· Location The northern, or Buchans Junction Area, extends south of the C.N.R. tracks from points about eight miles west and …  Lire la suite

During the months of July, August and early September of 1950 and 1951, a survey was conducted in southern Saskatchewan to determine the presence or absence of sylvatic plague (Pasteurella pestis (Lehmann and Neumann)) in native rodents, with special reference to Richardson’s ground squirrel (Oitellus richardsonii richardsonii (Sabine)) and its flea ectoparasites. The investigation was carried out in conjunction with field work done in May and June of the same years in a search for Rocky Mountain spotted fever (Dermacentroxenus rickettsi (Walbach)) and tularaeoeia (Pasteurella tularensis (McCoy and Chapin)), in the two species of ticks, Dermacentor variabilis (Say) and Dermacentor …  Lire la suite

The nutrient allowances presently recommended for growing chicks have been established using dietary protein levels of eighteen percent and a growth period of zero to eight weeks. This tends to mask the higher growth rate and possibly higher nutrient requirements of the initial four week period. Current research indicates that growth rate and efficiency of feed utilization can be improved by increasing the protein content and otherwise providing better nutritional balance of the ration. This raises the question of the adequacy of presently recommended vitamin allowances under the conditions of higher growth rate and feed efficiency now possible. The influence …  Lire la suite

Agricultural research in Canada is largely centralized on Experimental Farms and Stations and at Agricultural Schools and Colleges where the property is owned, considerable equipment is available and a highly technical staff is employed. It is not possible for government services or educational institutions to establish such units in each of the numerous localities where study is required. Various methods of solving this problem have been developed, Many methods are dependent on farmer interest for their success, in others a small allowance is made for crop loss and inconvenience caused by the presence of tests on the farm. Some local …  Lire la suite

The Klondike District of Central Yukon Territory around Dawson City is particularly advantageous for the study of the sequence of the Pleistocene epoch because it was never glaciated and therefore has never lost its fossiliferous superficial deposits. This paper presents a pollen diagram from a Sphagnum peat bed, which was the youngest deposit discovered, and pollen floras from different ages back to the Pliocene. The peat bed flora shows fairly steady climatic conditions little different from the present; the Pliocene flora shows a distinctly warmer climate; and all the others appear to show colder climates. The paper also presents a …  Lire la suite

This is a study of common human needs as presented by 97 recipients of War Veterans’ Allowance^1 who during 1949 first applied to the Montreal District Office of the Department of Veterans’ Affairs^2 for supplementation from the Assistance Fund. The study is concerned with the way in which these needs have been determined, how the Assistance Fund was set up and how it bas been administered to meet them. Considerable change in public welfare principles, in Canada, United States, Great Britain and other western democracies, bas taken place during the last two decades. This transition has been away from the …  Lire la suite

A study of the swelling of fibers in liquids has been made, using the permeability method based on the Kozeny equation. The rectified form of this equation was found to be generally applicable to liquid flow through beds of swollen fibres. The experimental limitations of the method have been analyzed and discussed. The swelling of pulp in a homologous series of alcohols has been examined. A relationship has been shown between the swelling of a pulp in water produced by beating and the development of paper strength in the beater. It was also found that extraction of this beaten pulp …  Lire la suite

The hemlock looper, Lambdina fiscellaria fiscellaria (Guenée), has been an important forest pest in Newfoundland for many years. Outbreaks have been reported from widely separated parts of the province, and in most cases, there has been a high mortality of balsam fir, Abies balsamea (L.) Mill. (Fig. l). A study of the insect was initiated in the spring of 1950, in Newfoundland, by the Division of Forest Biology, Dominion Department of Agriculture. The object of the study was to determine what factors influence the rise and fall of looper populations. Unfortunately, the outbreak had reached its peak when the study …  Lire la suite

Heard, R. (Supervisor)  Lire la suite

The terminal impedance of a full-wave dipole as a function of centre spacing has been measured for dipoles with the ratio of wave length to diameter (λ/D) equal to : 188, 94.3, 75.7, 62.9, 47.2, and 23.6 for centre spacings (S/λ)of .0212, .0423, .074, and .105. All measurements were made at 1000 megacycles using a standing wave measuring method with the half dipole above an image plane. The variation of resistance and reactance of the terminal impedance with centre spacing is shown in a series of graphs. A considerable increase in anti-resonant resistance and in antenna length for anti-resonance is …  Lire la suite

This work is part of an extensive program of investigations, by various governmental agencies in Canada and the United States of America, into the cause of damage to birch in the forests of Eastern North America. Birch, once considered as little better than a weed tree, is now in great demand as the source of an increasingly popular and useful hardwood. This intensive utilization of birch wood could have revitalized the old hardwood industries of the east and might even have encouraged the establishment of new ones had not the source of raw material been drastically reduced by an insidious …  Lire la suite

Grain crops are often afflicted with a disease commonly referred to as root rot or foot rot. Because root rot diseases are very variable in their symptom expression, they are frequently overlooked as the abnormal condition is often attributed to drought, wind, frost or other causes. For these reasons it is difficult to estimate the damage caused exclusively by root rots. It is generally agreed that the fungus Helminthosporium sativum P.K. & B. is of prime importance in the root rot complex affecting barley and wheat. By plating tests of seed samples of barley and wheat grown in representative areas …  Lire la suite

The purpose of this study is to describe the nature and quality of settlement in a typical part of the Quebec country-side, and to trace the evolution of the present pattern of settlement and the cultural landscape. The Richelieu Valley was chosen because of its significance in the history of the province of Quebec and because of its geographical interest. In the southern part of the Province of Quebec are round the St. Lawrence Lowlands. This level, fertile area, along the St. Lawrence River provides a great contrast to the rough, forested lands of the rest of the province. The …  Lire la suite

Bacteriophages, regarded today as viruses parasitic on bacteria, are characterized by a number of well-defined properties, one of these being the specificity exhibited by some varieties of phages, not only for a single species of bacteria, but also for certain strains or types of that single species. A practical application of this property has been the use of bacteriophage for the identification or phage typing of certain strains of a given species. Fisk (1942) introduced a method of phage typing of staphylococci which has been successfully used for tracing sources of infection in epidemic outbreaks of staphylococcal enterotoxin food-poisoning and …  Lire la suite

Bird, J. (Supervisor)  Lire la suite

De toutes les créations - et elles sont innombrables! - qui sont nées de la plume, merveilleusement douée de Victor Hugo, celle qui reste la plus populaire, c’est son roman “Notre-Dame de Paris”. On rencontre ici, à son moment le plus sublime, le travail d’un grand talent. Grâce au don de Hugo de décrire les choses longtemps disparues de la manière la plus éclatante, grâce à son immense imagination créatrice, on se sent, dès les premières lignes du roman, dans le Paris de 1482 - dans son atmosphère, parmi ses habitants. Mais quand, après avoir lu le dernier mot, on …  Lire la suite

The protein hormone, prolactin, has been of great interest to endocrinologists ever since the demonstration of its presence in the anterior pituitary by Stricker and Grueter in 1929. The action of this hormone was shown to be exerted on the fully developed mammary gland, causing the induction and maintenance of lactation (Nelson, 1936). This role of the hormone has even been of economic interest since prolactin for a time was used in Britian to prevent the decline in the spring in milk production of cows. More recently, there have been reports that prolactin may have other effects in the body …  Lire la suite

The work to be reported in this thesis has been restricted to the study of carbohydrate absorption. Since a number of aspects of the problem have received attention, these aspects have been dealt with in different chapters. It was thought that the subject could be more easily followed if the literature concerning each aspect was reviewed in the opening paragraphs of the separate chapters. For this reason the General Introduction will be limited to a brief description of the most common methods used in the past for the study of the intestinal absorption of carbohydrates, and following this to a …  Lire la suite

Since the beginning of the present century, many workers have been interested in various aspects of insect nutrition. The early investigators were interested in the effects of bacterial action and consequently were led to investigate the effect of sterilization of both the experimental animals and the dietary substrate. Pasteur, although he never attempted to do so himself, once declared to the Academy of Science that he hoped to see a research worker attempt to rear an animal under strictly aseptic conditions. Much of the nutritional literature is concerned with a continuation of this argument. Even today, such eminent workers as …  Lire la suite

During the month of September 1951, the writer mapped an area for the Quebec Bureau of Mines in order to complete the Three Rivers Map sheet. Dr. T.H. Clark has already mapped the greater part of the area which is underlain by paleozoic sediments. In the North-West corner, exposures of Pre-Cambrian remained unmapped.  Lire la suite

The object of this investigation was firstly to compare the three methods for the preparation of quinolinic acid (pyridine 2,3-dicarboxylic acid), namely, the oxidation of quinoline in a water solution either by potassium permanganate or hydrogen peroxide and the oxidation of 8-hydroxy quinoline with nitric acid at low temperatures. The first method seemed to be the most desirable since quinoline from coal-tar is an inexpensive material and potassium permanganate costs less than hydrogen peroxide. Previous publications dealing with this oxidation give low and inconsistent yields. Therefore, it was of interest to improve the method of oxidation of quinoline with potassium …  Lire la suite

This paper deals with the explanation of what seemed, under the circumstances, a rather surprising activity of about 30 minutes induced in crystals of potassium iodide when bombarded at 40 Mev in the McGill cyclotron. It is shown that the activity is, in reality, complex and arises from (1) C134 (32 min) formed from the K nuclei and (2) I128 127 (25 min) formed by neutron capture in I127. This is the first example of a strong activity so formed in the McGill cyclotron by capture of the numerous neutrons known to be released in all targets at high energies. …  Lire la suite

On découvre en Maeterlinck deux hommes: le poète et le naturaliste: le poète avec sa délicatesse et sa sensibilité, et le paysan flamand d`une constitution lourde et carrée. Maurice Maeterlinck naquit en 1862 dans la villa familiale d‘Oostacker, près de Gand. Le paysage belge lui fournit la scène pour Les Sept Princesses: une terre noire de marais, avec des chênes et des saules, des châteaux sombres sur des voûtes, et des canaux sinueux où flottent des cygnes. Le milieu mélancolique de Gand l’inclinait vers le fatalisme de ses premiers ouvrages. Il cherchait toujours la solitude; il aimait beaucoup le silence. …  Lire la suite

In connection with hydro-power development at Tranche, Quebec, series of hydraulic tests were performed on a model of the spillway in Hydraulics Laboratory of the Ecole Polytechnique de Montréal. The resulting discharge coefficient-versus-head curves for floodways Nos. 1, 2 and 3 were quite consistent and satisfactory except those for floodway No. 4, where repeated tests showed irregularities and deviations. All the above curves are given on page 12 of this thesis. The object of this thesis is to explain the deviations of the curves for floodway No. 4, employing detailed hydraulic tests and investigations. First part of the investigations consisted …  Lire la suite

Gill, J. (Supervisor)  Lire la suite

The area covered by this thesis is in the province of Ontario between longitudes 76° 00’ to 76° 30’ west and latitudes 44° 45’ to 45° 00’ north. It includes most of Lanark and part of Leeds counties. Within the county of Lanark there are parts of the townships of Dalhousie, Drummond, Montague, Bathurst, North Elmsley, South Sherbrooke and the entire township of North Burgess. The county of Leeds includes parts of the townships of North Crosby, South Burgess, South Elmsley, Bastard and Kitley. The largest towns in the map-area are: Perth, the county town of Lanark, which is in …  Lire la suite

Dry bovine serum albumin and bovine haemoglobin have been irradiated with 50 Mev cyclotron protons. The measured dosage rate was 6.1 ± 2.7 x 10^5 rep/second. Irradiation times varied from one to eight minutes. Fragments of gram molecular weight estimated at 1000 were round in sedimentation experiments on serum albumin irradiated with 7.3 x 10^7 rep. These fragments did not absorb at 2920 Å. It was concluded that molecules of serum albumin in which a single primary ionization occurs are broken preferentially at one point to give fragments of this size. Sedimentation experiments on haemoglobin irradiated with dosages of protons …  Lire la suite