McGill University Thèses et mémoires publiés en 1928

Johnson, F. (Supervisors)  Lire la suite

It is a well known fact that culture media, when sterilized by autoclaving, undergo certain changes which affect their original constitution. Attention is here drawn to the abundance of precipitated substances, the changes in hydrogen ion concentration, the hydrolysis of carbohydrates, and the formation of caramel in heat-sterilized culture solutions. The catalytic effect of heat in making these rapid alterations, and possibly others also which have so far evaded observation, proves to be a disadvantage in physiological studies which call for an exact knowledge of the chemical constitution of the media employed. [...]  Lire la suite

Mackay, I. (Supervisors)  Lire la suite

Du Roure, R. (Supervisors)  Lire la suite

Macmillan, C. (Supervisors)  Lire la suite

Sullivan, C. (Supervisors)  Lire la suite

Although the thickening of oils with and without the presence of air and catalysts has occupied the attention of chemists for many years owing to its recognizee industrialimportance, the sulphurization of oils has, on the other hand, been practically neglected. Since sulpbur and oxygen are very similar elements, especially as regards the compoundsthey form, it appeared that the changes taking place daring the sulphurization process would be analogous to those in the oxidation process, and quite recently (1) this was shown to be the case. [...]  Lire la suite

In the study of that branch of physical science which concerns itself with the inter-relations of atoms, and molecules to one another, as opposed to purely atomic physics, it has become customary to make a division of the forms in which substances exist into three slightly arbitrary states, the gaseous, liquid and solid states. Investigations of the gaseous state have been made possible by the conception of complete molecular chaos. The position and motion of any unit is completely in dependant of the positions and motions of any other unit. [...]  Lire la suite

A review of the work done in the investigation of lignin as recorded in the voluminous literature on the subject, must certainly convince one of the difficulties involved in this great problem, and also show most plainly that, although a vast amount of careful research has been done, the question of the constitution of lignin, and its relation to the other constituents of the plant, is still unsettled. The study of the physiology of plants tells us that, in the course of growth, certain tissues are deposited in regular order, beginning with the primary body; the process is one of …  Lire la suite

[...]It is generally accepted that the composition of the oat grain is influenced by number of factors such as variety, climate and soil.In the present study, the following factors in relation to the proportion of Hull will be considered: a) Variety (Earlil1ess-Type of Panicle-Shape of Kernel); b) Rates and Dates of Seeding; c) Rainfall Distribution; d) Weight per measured bushel; e) Yield of Grain per acre; f) Yield of Straw per acre; g) Lodging; h) LengtH of the Growing Season. [...]  Lire la suite

When Jacques Cartier the first white man to visit the island now known as Montreal came in 1535, he found the prosperous Indian village of Hochelaga with a population ot 1500. strangely enough, this population was made up ot "two different races, with different tastes, characters, and modes of living," the Senecas and the Wyandottes. Seventy years later Champ1ain visited the island which was then called "Minitik 8ten Entag 8 gibon" ("Island where there was a town") and found no traces ot the settlement. It had disappearedcompletely. Thirty-seven years later Maisonneuve, accompanied by seventeen companions founded the frontier colony of …  Lire la suite

The experimental facts of the stark-effect in hydrogen and helium are quite well known. In 1913 J. stark discovered that the spectral lines emitted by a gas were broadened, and in some cases were actually split if the gas was subjected to a high electric field. This effect, named after its discoverer, has been examined in great detail by many later workers.Stark and his collaborators used a modified canal-ray tube in which the electric field was produced between the usual perforated cathode and an auxiliary oathode placed a few millimetres away. [...]  Lire la suite

As a result of a general scheme, at present being carried out under the direction of Dr. H.H. Hibbert, for the investigation of Spruce Lignin isolated by the use of polyhydroxysolyents containin, free halogen or halogen acid, there are obtained a large number of complexes and residues. It is a matter of some importance to have analytical proceduressuitable for the identification of certain constituent groups in these residues, for it is only by such means that the course of a series of treatments or a series of extractionscan be intelligently followed. [...]  Lire la suite

Arthur Schnitzler ist am 15 Mai 1862 in Wien geboren. Sein Vater war der beruhmte Laryngologe und Universit&ts-professor Dr. Johann Schnitzler. Seine Jugendzeit verbrachte er wie alle normalen Knaben aus der hoheren Wiener Gesellschaft, bis er dann in 1879 vom Akademischen Gymnasium maturierte und sich dem Stu4ium der Medizin widmete. [...]  Lire la suite

Dawson, C. (Supervisors)  Lire la suite

Latham, G. (Supervisors)  Lire la suite

Files, H. (Supervisors)  Lire la suite

Dawson, C. (Supervisors)  Lire la suite

McBride, W. (Supervisors)  Lire la suite

A modern novelist, who is not quoted as being any authority, puts the following speech into the mouth of a professor of science, "Physical chemistyr is power, it is exactness, it is life". The first statement will be admitted in the sense that all knowledge is power, and the more accurate and extensive the knowledge, the greater the power it gives. The last statement is as clearly a fallacy unless the term "life" be given a very particular definition. While to assert that physical chemistry is mere exactness is an insult to the science. It is, however, the aim of …  Lire la suite

With the advent of the nineteenth century, a new era dawned in the progress of analytic geometry. The appearance of Poncelet's, "Traite des proprietes project ives des figures", in 1822, really initiated modern geometry. Mobius, five years later, in his "Barycentrische Caleul", introduced homogeneous co-ordinates, which greatly facilitated the discussion of descriptive geometrical properties. The outstanding contributor to analytic plane geometry in this significant period, however, was Johann Pliicker (1801-68), and we may regard him as the true founder of the modern theory of algebraic curves. [...]  Lire la suite

Stehle, R. (Supervisors)  Lire la suite

La Presse étrangère aux Etats-Unis est très répandue. Il existe des publications en 38 langues. (l) Parmi oelles-ci se trouve la presse Franco-Américaine. Les Français vinrent aux Etats-Unis pour profiter des avantages d'éducation et de richesse tout comme le firent les émigrants d'autres pays. Mais en changeant de pays i1s ne changèrent pas de patrie. Lepoète Henri de Bornier dit très heureusement "tout homme a deux pays, le sien et puis la France " il peut s'appeler Américain mais au fond i1 reste Français. [...]  Lire la suite

The property of rotating the plane of polarlzation of light, which certain crystals and liquids possess, is remarkable in that the physical theories of the phenomenon are numerous, not concordant and incomplete. Among them may be mentioned mathematical discussions by J. J. Thompson [...] in each or which expressions are found for rotatory power in terms of other characteristics of the active substance, generally of the charge and positions of the particles which make up the asymmetric molecule, but even assuming these to be known ina particular case the relations which are obtained are too oomplex to permit numerical evaluation. …  Lire la suite

Dawson, C. (Supervisors)  Lire la suite

Gillson, A. (Supervisor)  Lire la suite